Submission #1367356

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Source Code Expand

#include<iostream>
#include<string>
#include<cmath>
#include<queue>
#include<map>
#include<set>
#include<list>
#include<iomanip>
#include<vector>
#include<functional>
#include<algorithm>
#include<cstdio>
#include<unordered_map>
#define int long long
#define rep(i,a,n) for (int (i)=(a);(i)<(n);(i)++)
using namespace std;
typedef long long ll;
typedef long double ld;
signed  main() {
	int n,m,sum=0;
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		sum+=i*i;
	}
	cout<<sum%m<<endl;
}

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