Submission #59892

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Source Code Expand

#include<iostream>
#include<sstream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<string>
#include<vector>
#include<cmath>
#include<set>
#include<map>
#include<stack>
#include<queue>
#include<numeric>
#include<functional>
#include<complex>

using namespace std;
#define BET(a,b,c) ((a)<=(b)&&(b)<(c))
#define FOR(i,n) for(int i=0,i##_end=(int(n));i<i##_end;i++)
#define SZ(x) (int)(x.size())
#define ALL(x) (x).begin(),(x).end()
#define MP make_pair
#define CLS(x,val) memset((x) , val , sizeof(x)) 
typedef long long ll_t;
typedef long double ld_t;
typedef vector<int> VI;
typedef vector<VI> VVI;

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

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