Submission #59858

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Source Code Expand

#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <deque>
#include <complex>
#include <stack>
#include <queue>
#include <cstdio>
#include <cctype>
#include <cstring>
#include <ctime>
#include <iterator>
#include <bitset>
#include <numeric>
using namespace std;


typedef long long LL;
typedef pair<int,int> pii;
typedef pair<LL,LL> pll;


int main(){
	int n, m;
	cin >> n >> m;

	int k = n * (n + 1) * (2 * n + 1) / 6;
	cout << k % m << endl;
}

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