답안 #56855 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
56855	2018-07-12T22:55:55 Z	ksun48	Asceticism (JOI18_asceticism)	C++14	100 / 100	60 ms	2448 KB

asceticism

#include <bits/stdc++.h>
using namespace std;
typedef long long LL;

const LL MOD = 1000000007;

LL powmod(LL a, LL n){
	if(n == 0) return 1;
	if(n % 2) return (a * powmod(a, n-1)) % MOD;
	LL c = powmod(a, n/2);
	return (c * c) % MOD;
}

LL inv(LL a){
	return powmod(a, MOD-2);
}
LL fact[110000];
LL invfact[110000];

int main(){
	fact[0] = invfact[0] = 1;
	for(LL i = 1; i < 110000; i++){
		fact[i] = (i * fact[i-1]) % MOD;
		invfact[i] = inv(fact[i]);
	}
	LL n, k;
	cin >> n >> k;
	k--;
	LL ans = 0;
	for(LL i = 0; i <= k; i++){
		LL cur = powmod(k+1-i,n);
		cur = (cur * fact[n+1]) % MOD;
		cur = (cur * invfact[i]) % MOD;
		cur = (cur * invfact[n+1-i]) % MOD;
		if(i % 2) cur *= -1;
		ans = (ans + cur) % MOD;
	}
	ans %= MOD;
	if(ans < 0) ans += MOD;
	cout << ans << '\n';
}

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	41 ms	2040 KB	Output is correct
2	Correct	42 ms	2152 KB	Output is correct
3	Correct	40 ms	2152 KB	Output is correct
4	Correct	38 ms	2152 KB	Output is correct
5	Correct	42 ms	2152 KB	Output is correct
6	Correct	37 ms	2184 KB	Output is correct
7	Correct	38 ms	2200 KB	Output is correct
8	Correct	38 ms	2260 KB	Output is correct
9	Correct	38 ms	2260 KB	Output is correct
10	Correct	40 ms	2260 KB	Output is correct

Subtask #2
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	41 ms	2040 KB	Output is correct
2	Correct	42 ms	2152 KB	Output is correct
3	Correct	40 ms	2152 KB	Output is correct
4	Correct	38 ms	2152 KB	Output is correct
5	Correct	42 ms	2152 KB	Output is correct
6	Correct	37 ms	2184 KB	Output is correct
7	Correct	38 ms	2200 KB	Output is correct
8	Correct	38 ms	2260 KB	Output is correct
9	Correct	38 ms	2260 KB	Output is correct
10	Correct	40 ms	2260 KB	Output is correct
11	Correct	40 ms	2260 KB	Output is correct
12	Correct	37 ms	2260 KB	Output is correct
13	Correct	39 ms	2260 KB	Output is correct
14	Correct	40 ms	2260 KB	Output is correct
15	Correct	38 ms	2260 KB	Output is correct
16	Correct	39 ms	2260 KB	Output is correct
17	Correct	39 ms	2288 KB	Output is correct
18	Correct	45 ms	2288 KB	Output is correct
19	Correct	46 ms	2288 KB	Output is correct
20	Correct	40 ms	2288 KB	Output is correct

Subtask #3
25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	41 ms	2040 KB	Output is correct
2	Correct	42 ms	2152 KB	Output is correct
3	Correct	40 ms	2152 KB	Output is correct
4	Correct	38 ms	2152 KB	Output is correct
5	Correct	42 ms	2152 KB	Output is correct
6	Correct	37 ms	2184 KB	Output is correct
7	Correct	38 ms	2200 KB	Output is correct
8	Correct	38 ms	2260 KB	Output is correct
9	Correct	38 ms	2260 KB	Output is correct
10	Correct	40 ms	2260 KB	Output is correct
11	Correct	40 ms	2260 KB	Output is correct
12	Correct	37 ms	2260 KB	Output is correct
13	Correct	39 ms	2260 KB	Output is correct
14	Correct	40 ms	2260 KB	Output is correct
15	Correct	38 ms	2260 KB	Output is correct
16	Correct	39 ms	2260 KB	Output is correct
17	Correct	39 ms	2288 KB	Output is correct
18	Correct	45 ms	2288 KB	Output is correct
19	Correct	46 ms	2288 KB	Output is correct
20	Correct	40 ms	2288 KB	Output is correct
21	Correct	39 ms	2288 KB	Output is correct
22	Correct	42 ms	2288 KB	Output is correct
23	Correct	45 ms	2292 KB	Output is correct
24	Correct	45 ms	2292 KB	Output is correct
25	Correct	41 ms	2292 KB	Output is correct
26	Correct	38 ms	2292 KB	Output is correct
27	Correct	42 ms	2292 KB	Output is correct
28	Correct	40 ms	2388 KB	Output is correct
29	Correct	41 ms	2388 KB	Output is correct
30	Correct	39 ms	2388 KB	Output is correct

Subtask #4
51.0 / 51.0

#	결과	실행 시간	메모리	Grader output
1	Correct	41 ms	2040 KB	Output is correct
2	Correct	42 ms	2152 KB	Output is correct
3	Correct	40 ms	2152 KB	Output is correct
4	Correct	38 ms	2152 KB	Output is correct
5	Correct	42 ms	2152 KB	Output is correct
6	Correct	37 ms	2184 KB	Output is correct
7	Correct	38 ms	2200 KB	Output is correct
8	Correct	38 ms	2260 KB	Output is correct
9	Correct	38 ms	2260 KB	Output is correct
10	Correct	40 ms	2260 KB	Output is correct
11	Correct	40 ms	2260 KB	Output is correct
12	Correct	37 ms	2260 KB	Output is correct
13	Correct	39 ms	2260 KB	Output is correct
14	Correct	40 ms	2260 KB	Output is correct
15	Correct	38 ms	2260 KB	Output is correct
16	Correct	39 ms	2260 KB	Output is correct
17	Correct	39 ms	2288 KB	Output is correct
18	Correct	45 ms	2288 KB	Output is correct
19	Correct	46 ms	2288 KB	Output is correct
20	Correct	40 ms	2288 KB	Output is correct
21	Correct	39 ms	2288 KB	Output is correct
22	Correct	42 ms	2288 KB	Output is correct
23	Correct	45 ms	2292 KB	Output is correct
24	Correct	45 ms	2292 KB	Output is correct
25	Correct	41 ms	2292 KB	Output is correct
26	Correct	38 ms	2292 KB	Output is correct
27	Correct	42 ms	2292 KB	Output is correct
28	Correct	40 ms	2388 KB	Output is correct
29	Correct	41 ms	2388 KB	Output is correct
30	Correct	39 ms	2388 KB	Output is correct
31	Correct	38 ms	2388 KB	Output is correct
32	Correct	47 ms	2388 KB	Output is correct
33	Correct	42 ms	2388 KB	Output is correct
34	Correct	44 ms	2388 KB	Output is correct
35	Correct	56 ms	2392 KB	Output is correct
36	Correct	59 ms	2396 KB	Output is correct
37	Correct	60 ms	2400 KB	Output is correct
38	Correct	47 ms	2448 KB	Output is correct
39	Correct	44 ms	2448 KB	Output is correct
40	Correct	48 ms	2448 KB	Output is correct

답안 #56855

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