| # |
제출 시각 |
아이디 |
문제 |
언어 |
결과 |
실행 시간 |
메모리 |
| 18991 |
2016-02-17T02:47:19 Z |
kriii |
흑백 (kriii4_G) |
C++14 |
|
319 ms |
9060 KB |
#include <stdio.h>
const long long mod = 1000000007;
long long pow(long long a, long long p)
{
a %= mod;
p = (p % (mod - 1) + mod - 1) % (mod - 1);
long long r = 1;
while (p){
if (p & 1) r = r * a % mod;
a = a * a % mod;
p /= 2;
}
return r;
}
long long inv2[1010],comb[1010][1010];
int main()
{
inv2[0] = 1;
for (int i=1;i<=1000;i++){
inv2[i] = inv2[i-1] * 500000004 % mod;
}
for (int i=0;i<=1000;i++){
comb[i][0] = comb[i][i] = 1;
for (int j=1;j<i;j++) comb[i][j] = (comb[i-1][j-1] + comb[i-1][j]) % mod;
}
int h,w; scanf ("%d %d",&h,&w);
long long ans = 0;
for (int i=1;i<=h;i++) for (int j=1;i+j<=h;j++){
long long coeff = comb[h][i] * comb[h-i][j] % mod;
long long cnt = (pow(inv2[i]+inv2[j]+1,w) - pow(inv2[i]+1,w) - pow(inv2[j]+1,w) + 1 + mod * 2) % mod;
ans = (ans + coeff * cnt) % mod;
}
for (int k=0;k<2;k++){
for (int i=1;i<=h;i++) for (int j=1;i+j<=h;j++){
long long coeff = comb[h][i] * comb[h-i][j] % mod;
long long cnt = (pow(inv2[i+j]+inv2[i]+inv2[j]+1,w) - pow(inv2[i]+inv2[j]+1,w) + mod) % mod;
ans = (ans + coeff * cnt) % mod;
}
int t = h; h = w; w = t;
}
printf ("%lld\n",ans);
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
9060 KB |
Output is correct |
| 2 |
Correct |
0 ms |
9060 KB |
Output is correct |
| 3 |
Correct |
0 ms |
9060 KB |
Output is correct |
| 4 |
Correct |
2 ms |
9060 KB |
Output is correct |
| 5 |
Correct |
0 ms |
9060 KB |
Output is correct |
| 6 |
Correct |
0 ms |
9060 KB |
Output is correct |
| 7 |
Correct |
4 ms |
9060 KB |
Output is correct |
| 8 |
Correct |
4 ms |
9060 KB |
Output is correct |
| 9 |
Correct |
0 ms |
9060 KB |
Output is correct |
| 10 |
Correct |
0 ms |
9060 KB |
Output is correct |
| 11 |
Correct |
0 ms |
9060 KB |
Output is correct |
| 12 |
Correct |
0 ms |
9060 KB |
Output is correct |
| 13 |
Correct |
0 ms |
9060 KB |
Output is correct |
| 14 |
Correct |
0 ms |
9060 KB |
Output is correct |
| 15 |
Correct |
4 ms |
9060 KB |
Output is correct |
| 16 |
Correct |
0 ms |
9060 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
117 ms |
9060 KB |
Output is correct |
| 2 |
Correct |
47 ms |
9060 KB |
Output is correct |
| 3 |
Correct |
222 ms |
9060 KB |
Output is correct |
| 4 |
Correct |
144 ms |
9060 KB |
Output is correct |
| 5 |
Correct |
93 ms |
9060 KB |
Output is correct |
| 6 |
Correct |
80 ms |
9060 KB |
Output is correct |
| 7 |
Correct |
161 ms |
9060 KB |
Output is correct |
| 8 |
Correct |
9 ms |
9060 KB |
Output is correct |
| 9 |
Correct |
50 ms |
9060 KB |
Output is correct |
| 10 |
Correct |
178 ms |
9060 KB |
Output is correct |
| 11 |
Correct |
183 ms |
9060 KB |
Output is correct |
| 12 |
Correct |
161 ms |
9060 KB |
Output is correct |
| 13 |
Correct |
49 ms |
9060 KB |
Output is correct |
| 14 |
Correct |
226 ms |
9060 KB |
Output is correct |
| 15 |
Correct |
103 ms |
9060 KB |
Output is correct |
| 16 |
Correct |
93 ms |
9060 KB |
Output is correct |
| 17 |
Correct |
91 ms |
9060 KB |
Output is correct |
| 18 |
Correct |
97 ms |
9060 KB |
Output is correct |
| 19 |
Correct |
80 ms |
9060 KB |
Output is correct |
| 20 |
Correct |
29 ms |
9060 KB |
Output is correct |
| 21 |
Correct |
317 ms |
9060 KB |
Output is correct |
| 22 |
Correct |
314 ms |
9060 KB |
Output is correct |
| 23 |
Correct |
312 ms |
9060 KB |
Output is correct |
| 24 |
Correct |
319 ms |
9060 KB |
Output is correct |
