Submission #1247585

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Source Code Expand

#include<iostream>
#include<cstdio>
#include<string>
#include<algorithm>
#include<cstring>
#include<vector>
#include<cmath>
#include<queue>
#include<stack>
using namespace std;
#define INT(x) int x; scanf("%d",&x)
#define LL(x) ll x; scanf("%lld",&x)
#define INPUT(x) cin >> x
#define REP1(x,n) for(int x = 0; x < n; x++)
#define REP2(x,s,e) for(int x = s; x <= e; x++)
#define RREP1(x,n) for(int x = n-1; x >= 0; x--)
#define RREP2(x,s,e) for(int x = s; x >= e; x--)
#define BR printf("\n")
#define INF 2000000000

typedef long long ll;

//x^n % mod の計算
ll mod_pow(ll x, ll n, ll mod) {
	ll res = 1;
	while(n > 0){
		if(n&1) res = res * x % mod;
		x = x * x % mod;
		n >>= 1;
	}
	return res;
}

//nCk % mod の計算
ll mod_nCk(ll n, ll k, ll mod){
	k = min(k,n-k);
	ll ue = 1;
	ll shita = 1;

	REP1(i,k){
		ue = ue * n-i % mod;
	}

	REP2(i,1,k){
		shita = shita * i % mod;
	}

	return ue * mod_pow(shita,mod - 2,mod) % mod;
}

int main(){
	LL(W);LL(H);
	W--;H--;

	ll all = W + H;

	cout << mod_nCk(all, H, 1000000007) << endl;

    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:52:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  LL(W);LL(H);
       ^
./Main.cpp:52:13: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  LL(W);LL(H);
             ^

Judge Result