oj.uz

답안 #19789

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
19789 2016-02-25T05:40:02 Z xhae 창문 (kriii4_C) C++14
3 / 100
 0 ms 1084 KB 
#include <cstdio>

const long long MOD = 1000000007;

long long inv(long long tar) {
	long long ret = 1;
	for(int i = 30; i >= 0; i--) {
		ret = ret * ret % MOD;
		if((1ll << i) & (MOD - 2)) ret = ret * tar % MOD;
	}

	return ret;
}

long long func(long long c, long long x) {
	long long ret = (x * x % MOD * x % MOD * inv(3) % MOD * -1 + MOD) % MOD;
	ret = (ret + x * x % MOD * c % MOD * inv(2) % MOD) % MOD;
	ret = (ret + c * inv(2) % MOD * x % MOD + x * inv(3) % MOD) % MOD;
	return ret;
}

int main(void) {
	long long h, w;
	scanf("%lld %lld", &h, &w);

	h %= MOD;
	w %= MOD;

	long long xsum = func(w, w);
	long long ysum = func(h, h);

	long long ans = xsum * ysum % MOD * 9 % MOD;
	long long cases = w * (w + 1) % MOD * inv(2) % MOD;
	cases = cases * (h * (h + 1) % MOD * inv(2) % MOD) % MOD;
	ans = ans * inv(cases) % MOD;
	printf("%lld\n", ans);

	return 0;
}

Subtask #1
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 1084 KB Output is correct
2 Correct 0 ms 1084 KB Output is correct
3 Correct 0 ms 1084 KB Output is correct
4 Correct 0 ms 1084 KB Output is correct
5 Correct 0 ms 1084 KB Output is correct
6 Correct 0 ms 1084 KB Output is correct
7 Correct 0 ms 1084 KB Output is correct
8 Correct 0 ms 1084 KB Output is correct
9 Correct 0 ms 1084 KB Output is correct
10 Correct 0 ms 1084 KB Output is correct
11 Correct 0 ms 1084 KB Output is correct
12 Correct 0 ms 1084 KB Output is correct
13 Correct 0 ms 1084 KB Output is correct
14 Correct 0 ms 1084 KB Output is correct
15 Correct 0 ms 1084 KB Output is correct
16 Correct 0 ms 1084 KB Output is correct
17 Correct 0 ms 1084 KB Output is correct
18 Correct 0 ms 1084 KB Output is correct
19 Correct 0 ms 1084 KB Output is correct
20 Correct 0 ms 1084 KB Output is correct

Subtask #2
0.0 / 97.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 1084 KB Output is correct
2 Correct 0 ms 1084 KB Output is correct
3 Correct 0 ms 1084 KB Output is correct
4 Correct 0 ms 1084 KB Output is correct
5 Correct 0 ms 1084 KB Output is correct
6 Correct 0 ms 1084 KB Output is correct
7 Correct 0 ms 1084 KB Output is correct
8 Correct 0 ms 1084 KB Output is correct
9 Correct 0 ms 1084 KB Output is correct
10 Correct 0 ms 1084 KB Output is correct
11 Correct 0 ms 1084 KB Output is correct
12 Correct 0 ms 1084 KB Output is correct
13 Correct 0 ms 1084 KB Output is correct
14 Correct 0 ms 1084 KB Output is correct
15 Correct 0 ms 1084 KB Output is correct
16 Correct 0 ms 1084 KB Output is correct
17 Correct 0 ms 1084 KB Output is correct
18 Correct 0 ms 1084 KB Output is correct
19 Correct 0 ms 1084 KB Output is correct
20 Correct 0 ms 1084 KB Output is correct
21 Incorrect 0 ms 1084 KB Output isn't correct
22 Halted 0 ms 0 KB -