630G - Challenge Pennants - CodeForces Solution

combinatorics math *1600

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Python Code: 

import math
n = int(input())
 
print(math.comb(2 + n, 3) * math.comb(4 + n, 5))

C++ Code: 

#include<bits/stdc++.h>
using namespace std;
#define size(container) static_cast<int>(container.size())
#define int long long
constexpr int mod = (int)(1E9 + 7);
#ifndef ONLINE_JUDGE
#include "../debug.cpp"
#else
#define debug(...)
#endif
const int N = 510;
int c[N][N];
void init(){
  for(int i=0; i<N; ++i){
    c[i][0] = c[i][i] = 1;
    for(int j=1; j<i; ++j)  
      c[i][j] = c[i-1][j-1] + c[i-1][j];
  }
}
void varahamihira_(){
  int n;
  cin >> n;
  cout << c[n+4][5] * c[n+2][3];
}

signed main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  #ifndef ONLINE_JUDGE
    freopen("input.txt", "r", &_iob[0]);
    freopen("output.txt", "w", &_iob[1]);
  #endif
  init();
  int T = 1;
  #ifdef MULTITEST
  cin >> T;
  #endif
  while(T--){
    varahamihira_();
    if(T) cout << endl;
  }
  return 0;
}


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