답안 #49058 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
49058	2018-05-21T14:46:44 Z	Namnamseo	Asceticism (JOI18_asceticism)	C++17	100 / 100	49 ms	2572 KB

asceticism

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pp;
typedef pair<ll,ll> pll;
void read(int& x){ scanf("%d",&x); }
void read(ll& x){ scanf("%lld",&x); }
template<typename T,typename... Args>
void read(T& a,Args&... b){ read(a); read(b...); }
#define all(x) (x).begin(),(x).end()
#define pb push_back
#define eb emplace_back
#define x first
#define y second

int n, k;
const ll mod = 1'000'000'007;

ll fact[200001];

ll Pow(ll b, ll e){
	ll ret=1;
	while(e){
		if(e&1) (ret*=b)%=mod;
		e/=2; (b*=b)%=mod;
	}
	return ret;
}

ll Comb(ll n, ll r){
	if(r<0 || r>n) return 0;
	return fact[n]*Pow(fact[r], mod-2)%mod*Pow(fact[n-r], mod-2)%mod;
}

int main()
{
	fact[0]=1; for(int i=1; i<=200000; ++i) fact[i]=fact[i-1]*i%mod;
	
	int n, k;
	cin >> n >> k; --k;
	ll ans = 0;
	for(int j=0; j<=k; ++j){
		(ans += ((j%2?-1:1)*Comb(n+1, j)*Pow(k-j+1, n)%mod+mod)%mod) %= mod;
	}
	cout << ans;
	return 0;
}

Compilation message

asceticism.cpp: In function 'void read(int&)':
asceticism.cpp:6:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 void read(int& x){ scanf("%d",&x); }
                    ~~~~~^~~~~~~~~
asceticism.cpp: In function 'void read(ll&)':
asceticism.cpp:7:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 void read(ll& x){ scanf("%lld",&x); }
                   ~~~~~^~~~~~~~~~~

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	2040 KB	Output is correct
2	Correct	4 ms	2152 KB	Output is correct
3	Correct	5 ms	2152 KB	Output is correct
4	Correct	5 ms	2152 KB	Output is correct
5	Correct	5 ms	2208 KB	Output is correct
6	Correct	5 ms	2340 KB	Output is correct
7	Correct	4 ms	2340 KB	Output is correct
8	Correct	4 ms	2340 KB	Output is correct
9	Correct	5 ms	2388 KB	Output is correct
10	Correct	5 ms	2388 KB	Output is correct

Subtask #2
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	2040 KB	Output is correct
2	Correct	4 ms	2152 KB	Output is correct
3	Correct	5 ms	2152 KB	Output is correct
4	Correct	5 ms	2152 KB	Output is correct
5	Correct	5 ms	2208 KB	Output is correct
6	Correct	5 ms	2340 KB	Output is correct
7	Correct	4 ms	2340 KB	Output is correct
8	Correct	4 ms	2340 KB	Output is correct
9	Correct	5 ms	2388 KB	Output is correct
10	Correct	5 ms	2388 KB	Output is correct
11	Correct	4 ms	2388 KB	Output is correct
12	Correct	4 ms	2388 KB	Output is correct
13	Correct	4 ms	2388 KB	Output is correct
14	Correct	5 ms	2388 KB	Output is correct
15	Correct	5 ms	2508 KB	Output is correct
16	Correct	4 ms	2508 KB	Output is correct
17	Correct	4 ms	2572 KB	Output is correct
18	Correct	5 ms	2572 KB	Output is correct
19	Correct	5 ms	2572 KB	Output is correct
20	Correct	5 ms	2572 KB	Output is correct

Subtask #3
25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	2040 KB	Output is correct
2	Correct	4 ms	2152 KB	Output is correct
3	Correct	5 ms	2152 KB	Output is correct
4	Correct	5 ms	2152 KB	Output is correct
5	Correct	5 ms	2208 KB	Output is correct
6	Correct	5 ms	2340 KB	Output is correct
7	Correct	4 ms	2340 KB	Output is correct
8	Correct	4 ms	2340 KB	Output is correct
9	Correct	5 ms	2388 KB	Output is correct
10	Correct	5 ms	2388 KB	Output is correct
11	Correct	4 ms	2388 KB	Output is correct
12	Correct	4 ms	2388 KB	Output is correct
13	Correct	4 ms	2388 KB	Output is correct
14	Correct	5 ms	2388 KB	Output is correct
15	Correct	5 ms	2508 KB	Output is correct
16	Correct	4 ms	2508 KB	Output is correct
17	Correct	4 ms	2572 KB	Output is correct
18	Correct	5 ms	2572 KB	Output is correct
19	Correct	5 ms	2572 KB	Output is correct
20	Correct	5 ms	2572 KB	Output is correct
21	Correct	6 ms	2572 KB	Output is correct
22	Correct	5 ms	2572 KB	Output is correct
23	Correct	5 ms	2572 KB	Output is correct
24	Correct	5 ms	2572 KB	Output is correct
25	Correct	5 ms	2572 KB	Output is correct
26	Correct	6 ms	2572 KB	Output is correct
27	Correct	6 ms	2572 KB	Output is correct
28	Correct	5 ms	2572 KB	Output is correct
29	Correct	4 ms	2572 KB	Output is correct
30	Correct	5 ms	2572 KB	Output is correct

Subtask #4
51.0 / 51.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	2040 KB	Output is correct
2	Correct	4 ms	2152 KB	Output is correct
3	Correct	5 ms	2152 KB	Output is correct
4	Correct	5 ms	2152 KB	Output is correct
5	Correct	5 ms	2208 KB	Output is correct
6	Correct	5 ms	2340 KB	Output is correct
7	Correct	4 ms	2340 KB	Output is correct
8	Correct	4 ms	2340 KB	Output is correct
9	Correct	5 ms	2388 KB	Output is correct
10	Correct	5 ms	2388 KB	Output is correct
11	Correct	4 ms	2388 KB	Output is correct
12	Correct	4 ms	2388 KB	Output is correct
13	Correct	4 ms	2388 KB	Output is correct
14	Correct	5 ms	2388 KB	Output is correct
15	Correct	5 ms	2508 KB	Output is correct
16	Correct	4 ms	2508 KB	Output is correct
17	Correct	4 ms	2572 KB	Output is correct
18	Correct	5 ms	2572 KB	Output is correct
19	Correct	5 ms	2572 KB	Output is correct
20	Correct	5 ms	2572 KB	Output is correct
21	Correct	6 ms	2572 KB	Output is correct
22	Correct	5 ms	2572 KB	Output is correct
23	Correct	5 ms	2572 KB	Output is correct
24	Correct	5 ms	2572 KB	Output is correct
25	Correct	5 ms	2572 KB	Output is correct
26	Correct	6 ms	2572 KB	Output is correct
27	Correct	6 ms	2572 KB	Output is correct
28	Correct	5 ms	2572 KB	Output is correct
29	Correct	4 ms	2572 KB	Output is correct
30	Correct	5 ms	2572 KB	Output is correct
31	Correct	4 ms	2572 KB	Output is correct
32	Correct	5 ms	2572 KB	Output is correct
33	Correct	6 ms	2572 KB	Output is correct
34	Correct	13 ms	2572 KB	Output is correct
35	Correct	42 ms	2572 KB	Output is correct
36	Correct	48 ms	2572 KB	Output is correct
37	Correct	49 ms	2572 KB	Output is correct
38	Correct	11 ms	2572 KB	Output is correct
39	Correct	20 ms	2572 KB	Output is correct
40	Correct	24 ms	2572 KB	Output is correct

답안 #49058

Compilation message

Subtask #1 4.0 / 4.0

Subtask #2 20.0 / 20.0

Subtask #3 25.0 / 25.0

Subtask #4 51.0 / 51.0

Subtask #1
4.0 / 4.0

Subtask #2
20.0 / 20.0

Subtask #3
25.0 / 25.0

Subtask #4
51.0 / 51.0