Submission #1277080

#	Time	Username	Problem	Language	Result	Execution time	Memory
1277080		herominhsteve	Kangaroo (CEOI16_kangaroo)	C++20	0 / 100	1 ms	568 KiB

kangaroo

#include <bits/stdc++.h>
#define el '\n'
#define FNAME "kangaroo"
#define allof(x) x.begin(),x.end()
#define allof1(x) x.begin()+1,x.end()
#define mset(x,n) memset(x,(n),sizeof(x))
using namespace std;
const long long MOD = (long long) 1e9+7;
template<class X,class Y> bool minimize(X &a,Y b){ if (a>b) {a=b; return true;} return false;}
template<class X,class Y> bool maximize(X &a,Y b){ if (a<b) {a=b; return true;} return false;}

void setup(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
	if (fopen(FNAME".inp","r")){
		freopen(FNAME".inp","r",stdin);
		freopen(FNAME".out","w",stdout);
	}
}

int n,s,e;

void init(){
	cin>>n>>s>>e;
}

void sol(){
	long long res = 1;
	for (int i=2;i<=n-2;i++) res = res * i % MOD;
	cout<<res;
}

int main(){
    setup();
    init();
    sol();
}

Compilation message (stderr)

kangaroo.cpp: In function 'void setup()':
kangaroo.cpp:16:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |                 freopen(FNAME".inp","r",stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
kangaroo.cpp:17:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |                 freopen(FNAME".out","w",stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 6
• Subtask 2: 0 / 30
• Subtask 3: 0 / 15
• Subtask 4: 0 / 49