Submission #59904

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Source Code Expand

#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include<cassert>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
#include<bitset>

#define REP(i,b,n) for(int i=b;i<(int)n;i++)
#define rep(i,n)   REP(i,0,n)
#define ALL(C)     (C).begin(),(C).end()
#define FOR(it,o)  for(__typeof((o).begin()) it=(o).begin(); it!=(o).end(); ++it)
#define dbg(x) cout << __LINE__ << ' ' << #x << " = " << (x) << endl


typedef long long ll;

using namespace std;


int main(){
  int n, m;
  cin >> n>>m;
  ll sum = 0;
  REP(i, 1, n+1){
    sum += i*i;
  }
  cout << sum %m << endl;
  return 0;
}

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