QOJ.ac
QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#569744 | #8339. Rooted Tree | Poole_tea | AC ✓ | 1179ms | 159932kb | C++14 | 714b | 2024-09-17 10:00:17 | 2024-09-17 10:00:19 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std ;
#define int long long
const int MAXN = 1e7 + 10 ;
const int mod = 1e9 + 9 ;
int dp[MAXN], inv[MAXN], ans ;
inline int quick_pow (int a, int b) {
int res = 1 ;
while (b) {
if (b & 1) {
res *= a ;
res %= mod ;
}
a *= a ;
a %= mod ;
b >>= 1 ;
}
return res ;
}
signed main () {
int m, k ;
cin >> m >> k ;
for (int i = 1 ; i <= k ; i++) {
inv[i] = quick_pow (((m - 1) * (i - 1) % mod + 1) % mod , mod - 2) ;
dp[i] = (dp[i - 1] % mod) + (m - 1) * (dp[i - 1] * inv[i] % mod) + m ;
dp[i] %= mod ;
}
for (int i = 1 ; i <= k ; i++) {
ans += m * (dp[i - 1] * inv[i] % mod) + m ;
ans %= mod ;
}
cout << ans ;
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3696kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3636kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 74ms
memory: 14496kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 767ms
memory: 108832kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3692kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 855ms
memory: 121404kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 476ms
memory: 69948kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1143ms
memory: 158648kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 211ms
memory: 34800kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 633ms
memory: 90492kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 375ms
memory: 56812kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 347ms
memory: 49832kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 1002ms
memory: 140056kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1143ms
memory: 159932kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1160ms
memory: 159876kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1179ms
memory: 159752kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed