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답안 #223121

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
223121 2020-04-14T20:54:59 Z patrikpavic2 Asceticism (JOI18_asceticism) C++17
100 / 100
 42 ms 1280 KB 
#include <cstdio>
#include <cstring>
#include <vector>

#define X first
#define Y second
#define PB push_back

using namespace std;

typedef long long ll;
typedef pair < int , int > pii;
typedef vector < int > vi;

const int N = 1e5 + 500;
const int MOD = 1e9 + 7;

inline int add(int A,int B){
	if(A + B >= MOD) return A + B - MOD;
	return A + B;
}

inline int mul(int A,int B){
	return (ll)A * B % MOD;
}

inline int sub(int A,int B){
	if(A - B < 0) return A - B + MOD;
	return A - B;
}

inline int pot(int A,int B){
	int ret = 1, bas = A;
	for(;B;B >>= 1){
		if(B&1) ret = mul(ret, bas);
		bas = mul(bas, bas);
	}
	return ret;
}

int fak[N], inv[N], n, k;

void precompute(){
	fak[0] = 1; inv[0] = 1;
	for(int i = 1;i < N;i++){
		fak[i] = mul(fak[i - 1], i);
		inv[i] = pot(fak[i], MOD -2);
	}
}

int choose(int n,int k){
	return mul(fak[n], mul(inv[k], inv[n - k]));
}

int main(){
	precompute();
	scanf("%d%d", &n, &k);
	int ret = 0;
	for(int i = 0;i <= k;i++){
		ret = add(ret, mul(pot(MOD - 1, i), mul(choose(n + 1, i), pot(k - i, n))));
	}
	printf("%d\n", ret);
	return 0;
}

Compilation message

asceticism.cpp: In function 'int main()':
asceticism.cpp:57:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &k);
  ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 1152 KB Output is correct
2 Correct 23 ms 1024 KB Output is correct
3 Correct 23 ms 1024 KB Output is correct
4 Correct 22 ms 1024 KB Output is correct
5 Correct 23 ms 1152 KB Output is correct
6 Correct 22 ms 1152 KB Output is correct
7 Correct 22 ms 1024 KB Output is correct
8 Correct 22 ms 896 KB Output is correct
9 Correct 23 ms 1152 KB Output is correct
10 Correct 22 ms 1024 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 1152 KB Output is correct
2 Correct 23 ms 1024 KB Output is correct
3 Correct 23 ms 1024 KB Output is correct
4 Correct 22 ms 1024 KB Output is correct
5 Correct 23 ms 1152 KB Output is correct
6 Correct 22 ms 1152 KB Output is correct
7 Correct 22 ms 1024 KB Output is correct
8 Correct 22 ms 896 KB Output is correct
9 Correct 23 ms 1152 KB Output is correct
10 Correct 22 ms 1024 KB Output is correct
11 Correct 23 ms 1128 KB Output is correct
12 Correct 25 ms 1024 KB Output is correct
13 Correct 23 ms 1152 KB Output is correct
14 Correct 23 ms 1024 KB Output is correct
15 Correct 23 ms 1024 KB Output is correct
16 Correct 22 ms 1024 KB Output is correct
17 Correct 22 ms 1024 KB Output is correct
18 Correct 23 ms 1024 KB Output is correct
19 Correct 24 ms 1280 KB Output is correct
20 Correct 23 ms 1024 KB Output is correct

Subtask #3
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 1152 KB Output is correct
2 Correct 23 ms 1024 KB Output is correct
3 Correct 23 ms 1024 KB Output is correct
4 Correct 22 ms 1024 KB Output is correct
5 Correct 23 ms 1152 KB Output is correct
6 Correct 22 ms 1152 KB Output is correct
7 Correct 22 ms 1024 KB Output is correct
8 Correct 22 ms 896 KB Output is correct
9 Correct 23 ms 1152 KB Output is correct
10 Correct 22 ms 1024 KB Output is correct
11 Correct 23 ms 1128 KB Output is correct
12 Correct 25 ms 1024 KB Output is correct
13 Correct 23 ms 1152 KB Output is correct
14 Correct 23 ms 1024 KB Output is correct
15 Correct 23 ms 1024 KB Output is correct
16 Correct 22 ms 1024 KB Output is correct
17 Correct 22 ms 1024 KB Output is correct
18 Correct 23 ms 1024 KB Output is correct
19 Correct 24 ms 1280 KB Output is correct
20 Correct 23 ms 1024 KB Output is correct
21 Correct 22 ms 1024 KB Output is correct
22 Correct 24 ms 1024 KB Output is correct
23 Correct 22 ms 1024 KB Output is correct
24 Correct 23 ms 1152 KB Output is correct
25 Correct 27 ms 1140 KB Output is correct
26 Correct 23 ms 1024 KB Output is correct
27 Correct 23 ms 1152 KB Output is correct
28 Correct 23 ms 1152 KB Output is correct
29 Correct 22 ms 1024 KB Output is correct
30 Correct 23 ms 1024 KB Output is correct

Subtask #4
51.0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 1152 KB Output is correct
2 Correct 23 ms 1024 KB Output is correct
3 Correct 23 ms 1024 KB Output is correct
4 Correct 22 ms 1024 KB Output is correct
5 Correct 23 ms 1152 KB Output is correct
6 Correct 22 ms 1152 KB Output is correct
7 Correct 22 ms 1024 KB Output is correct
8 Correct 22 ms 896 KB Output is correct
9 Correct 23 ms 1152 KB Output is correct
10 Correct 22 ms 1024 KB Output is correct
11 Correct 23 ms 1128 KB Output is correct
12 Correct 25 ms 1024 KB Output is correct
13 Correct 23 ms 1152 KB Output is correct
14 Correct 23 ms 1024 KB Output is correct
15 Correct 23 ms 1024 KB Output is correct
16 Correct 22 ms 1024 KB Output is correct
17 Correct 22 ms 1024 KB Output is correct
18 Correct 23 ms 1024 KB Output is correct
19 Correct 24 ms 1280 KB Output is correct
20 Correct 23 ms 1024 KB Output is correct
21 Correct 22 ms 1024 KB Output is correct
22 Correct 24 ms 1024 KB Output is correct
23 Correct 22 ms 1024 KB Output is correct
24 Correct 23 ms 1152 KB Output is correct
25 Correct 27 ms 1140 KB Output is correct
26 Correct 23 ms 1024 KB Output is correct
27 Correct 23 ms 1152 KB Output is correct
28 Correct 23 ms 1152 KB Output is correct
29 Correct 22 ms 1024 KB Output is correct
30 Correct 23 ms 1024 KB Output is correct
31 Correct 23 ms 1152 KB Output is correct
32 Correct 24 ms 1152 KB Output is correct
33 Correct 23 ms 1024 KB Output is correct
34 Correct 26 ms 1152 KB Output is correct
35 Correct 38 ms 1024 KB Output is correct
36 Correct 40 ms 1024 KB Output is correct
37 Correct 42 ms 1024 KB Output is correct
38 Correct 25 ms 1152 KB Output is correct
39 Correct 28 ms 1024 KB Output is correct
40 Correct 30 ms 1024 KB Output is correct