Category Graph

Light OJ-1074 – Extended Traffic

Arunima Mandal Leave a comment 
#include <bits/stdc++.h>

#define ms(a,b)         memset(a,b,sizeof(a))
#define pb(a)           push_back(a)
#define db              double
#define ft              float
#define ll              long long
#define ull             unsigned long long
#define ff              first
#define ss              second
#define sz(x)           x.size()
#define qu              queue
#define pqu             priority_queue
#define vc              vector
#define vi              vector<int>
#define vll             vector<long long>
#define pii             pair<int,int>
#define pis             pair<int,string>
#define psi             pair<string,int>
#define all(x)          x.begin(),x.end()
#define CIN             ios_base::sync_with_stdio(0); cin.tie(0)
#define loop0(i,n)      for(int i=0;i<n;i++)
#define loop1(i,n)      for(int i=1;i<=n;i++)
#define stlloop(x)     for(__typeof(x.begin()) it=x.begin();it!=x.end();it++)
#define gcd(a, b)       __gcd(a, b)
#define lcm(a, b)       ((a)*((b)/gcd(a,b)))
#define case(z,x)       cout<<"Case "<<i<<": "<<x<<endl
#define case(z)         cout<<"Case "<<z<<": "
#define PI              3.14159265358979323846264338328
#define valid(tx,ty)    tx>=0 && tx<r && ty>=0 && ty<c
#define MAX             300
#define inf             10000000

/*---------------------------Graph Moves-----------------------------*/
//const int fx[]={+1,-1,+0,+0};
//const int fy[]={+0,+0,+1,-1};
//const int fx[]={+0,+0,+1,-1,-1,+1,-1,+1};   // Kings Move
//const int fy[]={-1,+1,+0,+0,+1,+1,-1,-1};  // Kings Move
//const int fx[]={-2, -2, -1, -1,  1,  1,  2,  2};  // Knights Move
//const int fy[]={-1,  1, -2,  2, -2,  2, -1,  1}; // Knights Move
/*------------------------------------------------------------------*/

using namespace std;

int dis[MAX],parent[MAX];
vector<int>gu,gv,cost;
int node,edge;
map <int, int> mp;

bool bellman_ford()
{
    loop0(i,MAX) dis[i]=inf;
    dis[1]=0;
    loop1(i,node)
    {
        bool change=0;
        loop0(j,edge)
        {
            int u=gu[j];
            int v=gv[j];
            if(dis[u]+cost[j]<dis[v])
            {
                change=1;
                dis[v]=dis[u]+cost[j];
            }
        }
        if(change==0) return 1;
    }
}

int main()
{
//    freopen("in.txt", "r", stdin);
//    freopen("out.txt", "w", stdout);
    int n_cost,t;
    cin>>t;
    loop1(z,t)
    {
        cin>>node;
        loop1(i,node)
        {
            cin>>n_cost;
            mp[i]=n_cost;
        }
        cin>>edge;
        loop0(i,edge)
        {
            int from,to,w;
            cin>>from>>to;
            gu.pb(from);
            gv.pb(to);
            w=mp[to]-mp[from];
            cost.pb(w*w*w);
        }
        int q,n;
        cin>>q;
        cout<<"Case "<<z<<":"<<endl;
        int a=bellman_ford();
        loop0(i,q)
        {
            cin>>n;
            if(dis[n]<3 || dis[n]>100000) cout<<"?"<<endl;
            else cout<<dis[n]<<endl;
        }
        gu.clear();
        gv.clear();
        cost.clear();
        mp.clear();
    }
    return 0;
}

UVa – 352 – The Seasonal War

Arunima Mandal Leave a comment 
#include <bits/stdc++.h>

#define ms(a,b)         memset(a,b,sizeof(a))
#define pb(a)           push_back(a)
#define db              double
#define ft              float
#define ll              long long
#define ull             unsigned long long
#define ff              first
#define ss              second
#define sz(x)           x.size()
#define qu              queue
#define pqu             priority_queue
#define vc              vector
#define vi              vector<int>
#define vll             vector<long long>
#define pii             pair<int,int>
#define pis             pair<int,string>
#define psi             pair<string,int>
#define all(x)          x.begin(),x.end()
#define CIN             ios_base::sync_with_stdio(0); cin.tie(0)
#define loop0(i,n)      for(int i=0;i<n;i++)
#define loop1(i,n)      for(int i=1;i<=n;i++)
#define stlloop(x)     for(__typeof(x.begin()) it=x.begin();it!=x.end();it++)
#define gcd(a, b)       __gcd(a, b)
#define lcm(a, b)       ((a)*((b)/gcd(a,b)))
#define case(z,x)       cout<<"Case "<<i<<": "<<x<<endl
#define case(z)         cout<<"Case "<<z<<": "
#define PI              3.14159265358979323846264338328
#define valid(tx,ty)    tx>=1 && tx<=row && ty>=1 && ty<=col
#define MAX             2000

using namespace std;


/*----------------------Graph Moves----------------*/
//const int fx[]={+1,-1,+0,+0};
//const int fy[]={+0,+0,+1,-1};
const int fx[]= {+0,+0,+1,-1,-1,+1,-1,+1};  // Kings Move
const int fy[]= {-1,+1,+0,+0,+1,+1,-1,-1}; // Kings Move
//const int fx[]={-2, -2, -1, -1,  1,  1,  2,  2};  // Knights Move// GHORA
//const int fx[]={-2, -2, -1, -1,  1,  1,  2,  2};  // Knights Move// GHORA
//const int fy[]={-1,  1, -2,  2, -2,  2, -1,  1}; // Knights Move
/*------------------------------------------------*/

int row,col;
bool vis[30][30];

void dfs(int sx, int sy)
{
    vis[sx][sy]=1;
    loop0(i,8)
    {
        int tx=sx+fx[i];
        int ty=sy+fy[i];
        if(valid(tx,ty) && vis[tx][ty]==0) dfs(tx,ty);
    }
}

int main()
{
    CIN;
//    freopen("in.txt","r",stdin);
//    freopen("out.txt","w",stdout);

    int t=0;
    while(cin>>row)
    {
        t++;
        col=row;
        ms(vis,0);
        string s;
        vector<pii>v;
        loop1(i,row)
        {
            cin>>s;
            loop0(j,col)
            {
                if(s[j]=='1') v.pb(pii(i,j+1));
                else vis[i][j+1]=1;
            }
        }
        int ans=0;
        loop0(i,sz(v))
        {
            if(!vis[v[i].ff][v[i].ss])
            {
                ans++;
                dfs(v[i].ff,v[i].ss);
            }
        }
        cout<<"Image number "<<t<<" contains "<<ans<<" war eagles."<<endl;
    }
    return 0;
}

UVa – 572 – Oil Deposit

Arunima Mandal Leave a comment 
#include <bits/stdc++.h>

#define ms(a,b)         memset(a,b,sizeof(a))
#define pb(a)           push_back(a)
#define db              double
#define ft              float
#define ll              long long
#define ull             unsigned long long
#define ff              first
#define ss              second
#define sz(x)           x.size()
#define qu              queue
#define pqu             priority_queue
#define vc              vector
#define vi              vector<int>
#define vll             vector<long long>
#define pii             pair<int,int>
#define pis             pair<int,string>
#define psi             pair<string,int>
#define all(x)          x.begin(),x.end()
#define CIN             ios_base::sync_with_stdio(0); cin.tie(0)
#define loop0(i,n)      for(int i=0;i<n;i++)
#define loop1(i,n)      for(int i=1;i<=n;i++)
#define stlloop(x)     for(__typeof(x.begin()) it=x.begin();it!=x.end();it++)
#define gcd(a, b)       __gcd(a, b)
#define lcm(a, b)       ((a)*((b)/gcd(a,b)))
#define case(z,x)       cout<<"Case "<<i<<": "<<x<<endl
#define case(z)         cout<<"Case "<<z<<": "
#define PI              3.14159265358979323846264338328
#define valid(tx,ty)    tx>=1 && tx<=row && ty>=1 && ty<=col
#define MAX             2000

using namespace std;


/*----------------------Graph Moves----------------*/
//const int fx[]={+1,-1,+0,+0};
//const int fy[]={+0,+0,+1,-1};
const int fx[]= {+0,+0,+1,-1,-1,+1,-1,+1};  // Kings Move
const int fy[]= {-1,+1,+0,+0,+1,+1,-1,-1}; // Kings Move
//const int fx[]={-2, -2, -1, -1,  1,  1,  2,  2};  // Knights Move// GHORA
//const int fx[]={-2, -2, -1, -1,  1,  1,  2,  2};  // Knights Move// GHORA
//const int fy[]={-1,  1, -2,  2, -2,  2, -1,  1}; // Knights Move
/*------------------------------------------------*/

int row,col;
bool vis[105][105];

void dfs(int sx, int sy)
{
    vis[sx][sy]=1;
    loop0(i,8)
    {
        int tx=sx+fx[i];
        int ty=sy+fy[i];
        if(valid(tx,ty) && vis[tx][ty]==0) dfs(tx,ty);
    }
}

int main()
{
    CIN;
//    freopen("in.txt","r",stdin);
//    freopen("out.txt","w",stdout);

    while(cin>>row>>col)
    {
        if(row==0) break;
        ms(vis,0);
        string s;
        vector<pii>v;
        loop1(i,row)
        {
            cin>>s;
            loop0(j,col)
            {
                if(s[j]=='@') v.pb(pii(i,j+1));
                else vis[i][j+1]=1;
            }
        }
        int ans=0;
        loop0(i,sz(v))
        {
            if(!vis[v[i].ff][v[i].ss])
            {
                ans++;
                dfs(v[i].ff,v[i].ss);
            }
        }
        cout<<ans<<endl;
    }
    return 0;
}

UVa – 10189 – Minesweeper

Arunima Mandal Leave a comment 
#include <bits/stdc++.h>

#define ms(a,b)         memset(a,b,sizeof(a))
#define pb(a)           push_back(a)
#define db              double
#define ft              float
#define ll              long long
#define ull             unsigned long long
#define ff              first
#define ss              second
#define sz(x)           x.size()
#define qu              queue
#define pqu             priority_queue
#define vc              vector
#define vi              vector<int>
#define vll             vector<long long>
#define pii             pair<int,int>
#define pis             pair<int,string>
#define psi             pair<string,int>
#define all(x)          x.begin(),x.end()
#define CIN             ios_base::sync_with_stdio(0); cin.tie(0)
#define loop0(i,n)      for(int i=0;i<n;i++)
#define loop1(i,n)      for(int i=1;i<=n;i++)
#define stlloop(x)     for(__typeof(x.begin()) it=x.begin();it!=x.end();it++)
#define gcd(a, b)       __gcd(a, b)
#define lcm(a, b)       ((a)*((b)/gcd(a,b)))
#define case(z,x)       cout<<"Case "<<i<<": "<<x<<endl
#define case(z)         cout<<"Case "<<z<<": "
#define PI              3.14159265358979323846264338328
#define valid(tx,ty)    tx>=0 && tx<row && ty>=0 && ty<col
#define MAX             2000

using namespace std;


/*----------------------Graph Moves----------------*/
//const int fx[]={+1,-1,+0,+0};
//const int fy[]={+0,+0,+1,-1};
const int fx[]= {+0,+0,+1,-1,-1,+1,-1,+1};  // Kings Move
const int fy[]= {-1,+1,+0,+0,+1,+1,-1,-1}; // Kings Move
//const int fx[]={-2, -2, -1, -1,  1,  1,  2,  2};  // Knights Move// GHORA
//const int fx[]={-2, -2, -1, -1,  1,  1,  2,  2};  // Knights Move// GHORA
//const int fy[]={-1,  1, -2,  2, -2,  2, -1,  1}; // Knights Move
/*------------------------------------------------*/

int row,col;
int vis[105][105];
char cell[105][105];

void dfs(int sx, int sy)
{
    vis[sx][sy]=-1;
    loop0(i,8)
    {
        int tx=sx+fx[i];
        int ty=sy+fy[i];
        if(valid(tx,ty) && cell[tx][ty]!='*') vis[tx][ty]++;
    }
}

int main()
{
    CIN;
//    freopen("in.txt","r",stdin);
//    freopen("out.txt","w",stdout);

    int t=0;
    bool c=0;
    while(cin>>row>>col)
    {
        if(row==0 && col==0) break;
        if(c) cout<<endl;
        c=1;
        t++;
        ms(vis,0);
        ms(cell,0);
        string s;
        vector<pii>v;
        loop0(i,row)
        {
            cin>>s;
            loop0(j,col)
            {
                if(s[j]=='*')
                {
                    v.pb(pii(i,j));
                    cell[i][j]='*';
                }
            }
        }
        loop0(i,sz(v)) dfs(v[i].ff,v[i].ss);
        cout<<"Field #"<<t<<":"<<endl;
        loop0(i,row)
        {
            loop0(j,col)
            {
                if(vis[i][j]!=-1) cout<<vis[i][j];
                else cout<<cell[i][j];
            }
            cout<<endl;
        }
    }
    return 0;
}

UVa – 11244 – Counting Stars

Arunima Mandal Leave a comment 
#include <bits/stdc++.h>

#define ms(a,b)         memset(a,b,sizeof(a))
#define pb(a)           push_back(a)
#define db              double
#define ft              float
#define ll              long long
#define ull             unsigned long long
#define ff              first
#define ss              second
#define sz(x)           x.size()
#define qu              queue
#define pqu             priority_queue
#define vc              vector
#define vi              vector<int>
#define vll             vector<long long>
#define pii             pair<int,int>
#define pis             pair<int,string>
#define psi             pair<string,int>
#define all(x)          x.begin(),x.end()
#define CIN             ios_base::sync_with_stdio(0); cin.tie(0)
#define loop0(i,n)      for(int i=0;i<n;i++)
#define loop1(i,n)      for(int i=1;i<=n;i++)
#define stlloop(x)     for(__typeof(x.begin()) it=x.begin();it!=x.end();it++)
#define gcd(a, b)       __gcd(a, b)
#define lcm(a, b)       ((a)*((b)/gcd(a,b)))
#define case(z,x)       cout<<"Case "<<i<<": "<<x<<endl
#define case(z)         cout<<"Case "<<z<<": "
#define PI              3.14159265358979323846264338328
#define valid(tx,ty)    tx>=0 && tx<row && ty>=0 && ty<col
#define MAX             2000

using namespace std;


/*----------------------Graph Moves----------------*/
//const int fx[]={+1,-1,+0,+0};
//const int fy[]={+0,+0,+1,-1};
const int fx[]= {+0,+0,+1,-1,-1,+1,-1,+1};  // Kings Move
const int fy[]= {-1,+1,+0,+0,+1,+1,-1,-1}; // Kings Move
//const int fx[]={-2, -2, -1, -1,  1,  1,  2,  2};  // Knights Move// GHORA
//const int fx[]={-2, -2, -1, -1,  1,  1,  2,  2};  // Knights Move// GHORA
//const int fy[]={-1,  1, -2,  2, -2,  2, -1,  1}; // Knights Move
/*------------------------------------------------*/

int row,col;
bool vis[105][105];

int dfs(int sx, int sy)
{
    vis[sx][sy]=1;
    int r=0;
    loop0(i,8)
    {
        int tx=sx+fx[i];
        int ty=sy+fy[i];
        if(valid(tx,ty) && vis[tx][ty]==0) r+=1+dfs(tx,ty);
    }
    if(r==0) return r=1;
    else return r=0;
}

int main()
{
    CIN;
//    freopen("in.txt","r",stdin);
//    freopen("out.txt","w",stdout);


    while(cin>>row>>col)
    {
        if(row==0 && col==0) break;
        ms(vis,0);
        string s;
        vector<pii>v;
        loop0(i,row)
        {
            cin>>s;
            loop0(j,col)
            {
                if(s[j]=='*') v.pb(pii(i,j));
                else vis[i][j]=1;
            }
        }
        int ans=0;
        loop0(i,sz(v))
        {
            if(!vis[v[i].ff][v[i].ss])
            {
                ans=ans+dfs(v[i].ff,v[i].ss);
            }
        }
        cout<<ans<<endl;
    }
    return 0;
}