1283B - Candies Division - CodeForces Solution


math *900

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Python Code:

for _ in range(int(input())):
    n, k = map(int, input().split())

    print(k*(n//k) + (k//2 if n%k >= k//2 else n%k))

C++ Code:

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        long long n,m;
        cin>>n>>m;
        cout<<((n/m)*m)+min(n%m,m/2)<<endl;
    }
}




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