| # |
제출 시각 |
아이디 |
문제 |
언어 |
결과 |
실행 시간 |
메모리 |
| 19872 |
2016-02-25T06:29:31 Z |
gs13068 |
팔찌 (kriii4_V) |
C++ |
|
932 ms |
12800 KB |
#include <cstdio>
const int p = 1000000007;
int pw(int x, int y)
{
return y & 1 ? (long long)pw(x, y ^ 1)*x%p : y ? pw((long long)x*x%p, y >> 1) : 1;
}
int a[1000001];
int c[1000001];
int d[1000001];
int main()
{
int i, j, t1, t2, n, m, r = 0;
scanf("%d%d", &n, &m);
for (i = 1; i <= n; i++)
{
t1 = (a[i] + pw(m, i)) % p;
for (j = i; j <= n; j += i)
{
a[j] = (a[j] + p - t1) % p;
d[j] = (d[j] + (long long)t1*(j / i)) % p;
}
}
r = 2;
for (i = 1; i <= n; i++)
{
d[i] = (long long)d[i] * pw(i, p - 2) % p;
r = (r + d[i]) % p;
if (i & 1) r = (r + pw(m, i + 1 >> 1)) % p;
else r = (r + pw(m, i >> 1) * 500000004LL % p * (m + 1)) % p;
}
printf("%lld", r * 500000004LL % p);
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 2 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 3 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 4 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 5 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 6 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 7 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 8 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 9 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 10 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 11 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 12 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 13 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 14 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 15 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 16 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 17 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 18 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 19 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 20 |
Correct |
0 ms |
12800 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 2 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 3 |
Correct |
0 ms |
12800 KB |
Output is correct |
| 4 |
Correct |
43 ms |
12800 KB |
Output is correct |
| 5 |
Correct |
560 ms |
12800 KB |
Output is correct |
| 6 |
Correct |
695 ms |
12800 KB |
Output is correct |
| 7 |
Correct |
535 ms |
12800 KB |
Output is correct |
| 8 |
Correct |
669 ms |
12800 KB |
Output is correct |
| 9 |
Correct |
764 ms |
12800 KB |
Output is correct |
| 10 |
Correct |
892 ms |
12800 KB |
Output is correct |
| 11 |
Correct |
766 ms |
12800 KB |
Output is correct |
| 12 |
Correct |
862 ms |
12800 KB |
Output is correct |
| 13 |
Correct |
508 ms |
12800 KB |
Output is correct |
| 14 |
Correct |
828 ms |
12800 KB |
Output is correct |
| 15 |
Correct |
470 ms |
12800 KB |
Output is correct |
| 16 |
Correct |
574 ms |
12800 KB |
Output is correct |
| 17 |
Correct |
928 ms |
12800 KB |
Output is correct |
| 18 |
Correct |
543 ms |
12800 KB |
Output is correct |
| 19 |
Correct |
671 ms |
12800 KB |
Output is correct |
| 20 |
Correct |
932 ms |
12800 KB |
Output is correct |
