AA

#include <iostream>
using namespace std;

int main() {
    int n, m, i, sum =0;
    cin>>n>>m;
    for(i=1; i<=n; i++){
        if(i%m == 0){
            sum = sum +i;
        }
    }
    
    cout<<sum;
    return 0;
}

Cpp

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AA

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