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답안 #20007

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
20007 2016-02-25T08:24:02 Z algoshipda 창문 (kriii4_C) C++14
3 / 100
 0 ms 1720 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long lld;
const lld MOD = 1e9 + 7;

inline void mult(lld& a, lld b)
{
	a%=MOD;
	b%=MOD;
	a = 1ll * a * b % MOD;
}

inline lld mult2(lld a, lld b)
{
	a%=MOD;
	b%=MOD;
	return 1ll * a * b % MOD;
}

pair<lld, lld> extgcd(lld a, lld b)
{
	if(b == 0) return {1,0};
	pair<lld, lld> t = extgcd(b, a%b);
	return {t.second, t.first - t.second*(a/b)};
}

lld inv(lld a)
{
	return (extgcd(a, MOD).first % MOD + MOD ) % MOD;
}

int main()
{
	lld h, w;
	scanf("%lld%lld",&h,&w);
	h %= MOD;
	w %= MOD;
	lld b = mult2(mult2(mult2(h,(h+1)%MOD), mult2(w,(w+1)%MOD)), inv(4));
	lld hh = h;
	mult(hh, (h+1)%MOD);
	mult(hh, (h+2)%MOD);
	mult(hh, inv(6));
	lld ww = w;
	mult(ww, (w+1)%MOD);
	mult(ww, (w+2)%MOD);
	mult(ww, inv(6));
	lld a = mult2(hh,ww);
	mult(a, 9);
	printf("%lld",mult2(a, inv(b)));
}

Subtask #1
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 1720 KB Output is correct
2 Correct 0 ms 1720 KB Output is correct
3 Correct 0 ms 1720 KB Output is correct
4 Correct 0 ms 1720 KB Output is correct
5 Correct 0 ms 1720 KB Output is correct
6 Correct 0 ms 1720 KB Output is correct
7 Correct 0 ms 1720 KB Output is correct
8 Correct 0 ms 1720 KB Output is correct
9 Correct 0 ms 1720 KB Output is correct
10 Correct 0 ms 1720 KB Output is correct
11 Correct 0 ms 1720 KB Output is correct
12 Correct 0 ms 1720 KB Output is correct
13 Correct 0 ms 1720 KB Output is correct
14 Correct 0 ms 1720 KB Output is correct
15 Correct 0 ms 1720 KB Output is correct
16 Correct 0 ms 1720 KB Output is correct
17 Correct 0 ms 1720 KB Output is correct
18 Correct 0 ms 1720 KB Output is correct
19 Correct 0 ms 1720 KB Output is correct
20 Correct 0 ms 1720 KB Output is correct

Subtask #2
0.0 / 97.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 1720 KB Output is correct
2 Correct 0 ms 1720 KB Output is correct
3 Correct 0 ms 1720 KB Output is correct
4 Correct 0 ms 1720 KB Output is correct
5 Correct 0 ms 1720 KB Output is correct
6 Correct 0 ms 1720 KB Output is correct
7 Correct 0 ms 1720 KB Output is correct
8 Correct 0 ms 1720 KB Output is correct
9 Correct 0 ms 1720 KB Output is correct
10 Correct 0 ms 1720 KB Output is correct
11 Correct 0 ms 1720 KB Output is correct
12 Correct 0 ms 1720 KB Output is correct
13 Correct 0 ms 1720 KB Output is correct
14 Correct 0 ms 1720 KB Output is correct
15 Correct 0 ms 1720 KB Output is correct
16 Correct 0 ms 1720 KB Output is correct
17 Correct 0 ms 1720 KB Output is correct
18 Correct 0 ms 1720 KB Output is correct
19 Correct 0 ms 1720 KB Output is correct
20 Correct 0 ms 1720 KB Output is correct
21 Incorrect 0 ms 1720 KB Output isn't correct
22 Halted 0 ms 0 KB -