Submission #1117877

#	Time	Username	Problem	Language	Result	Execution time	Memory
1117877		vjudge1	Kangaroo (CEOI16_kangaroo)	C++17	0 / 100	1 ms	508 KiB

kangaroo

#include "bits/stdc++.h"
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll long long
#define pb push_back
#define in insert
#define F first
#define S second
#define vll vector<ll>
#define all(v) v.begin(),v.end()
#define endl '\n'
#define pii pair<ll,ll>
using namespace std;
const ll INF =1e18, mod = 1e9 + 7, N = 1e5 + 5;
ll gcd(ll a, ll b){
    if(b == 0){
        return a;
    }
    return gcd(b, a % b);
}
ll lcm(ll a, ll b){
    return (a / gcd(a,b)) * b;
}
void solve(){
    ll n,s,e;
    cin >> n >> s >> e;
    ll sw = 1;
    sw *= (n - 2);
    sw %= mod;
    ll x = n - 2;
    for(int i = 0; i < n - 3; i++){
        x--;
        sw *= x;
        sw %= mod;
    }
    cout <<sw%mod<< endl;
}
int main(){
    fast;
    ll t = 1;
   // cin >> t;  
    while(t--){
        solve();
    }
    return 0;
}

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