#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i,T;
    scanf("%d",&T);
    for(i=0; i<T; i++)
    {
        int x,y,r;
        double sd,ld,d;
        scanf("%d %d %d",&x,&y,&r);
        d=pow(((x*x)+(y*y)),0.5);
        if(d<=r)
        {
            sd=r-d;
            ld=r+d;
            printf("%.2f %.2f\n",sd,ld);
        }

    }
    return 0;
}

Note:

I don’t remember why but I marked this problem as a “Tricky” problem when I solved this !!

#include <bits/stdc++.h>

using namespace std;

int main()
{
    int x,y,z,t;
    cin>>t;
    for(int i=1; i<=t; i++)
    {
        cin>>x>>y>>z;
        x=(((2*x)-y)*z)/(x+y);
        if(x<=0)
            cout<<"0"<<endl;
        else if(x>z)
            cout<<z<<endl;
        else
            cout<<x<<endl;
    }
    return 0;
}

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int a,b,c,d;
    for(;;)
    {
        scanf("%d %d",&a,&b);
        if(a==-1 && b==-1)
        {
            break;
        }
        else if(a>b)
        {
            c=a-b;
            d=(100+b)-a;
        }
        else if(a<b)
        {
            c=b-a;
            d=(100+a)-b;
        }
        else if(a==b)
        {
            c=0;
            d=0;
        }

        if(c>d)
        {
            printf("%d\n",d);
        }
        else if(d>c)
        {
            printf("%d\n",c);
        }
        else if(c==d)
        {
            printf("%d\n",c);
        }
    }
    return 0;
}

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i,T;
    scanf("%d",&T);
    for(i=1; i<=T; i++)
    {
        int a,b,c;
        scanf("%d %d %d",&a,&b,&c);
        if(a<=20 && b<=20 && c<=20)
        {
            printf("Case %d: good\n",i);
        }
        else
        {
            printf("Case %d: bad\n",i);
        }

    }
}

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i,t;
    scanf("%d",&t);
    for(i=0; i<t; i++)
    {
        int a,b,c;
        scanf("%d %d %d",&a,&b,&c);
        if(a+b>c)
        {
            printf("OK\n");
        }
        else
        {
            printf("Wrong!!\n");
        }
    }
    return 0;
}