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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 |
---|---|---|---|---|---|---|---|---|---|
#599780 | #8339. Rooted Tree | Saton | AC ✓ | 1143ms | 81824kb | C++20 | 1004b | 2024-09-29 10:38:32 | 2024-09-29 10:38:32 |
Judging History
answer
///by Saton.
#include<bits/stdc++.h>
#define PI acos(-1)
#define fi first
#define se second
#define sz(a) ((int)a.size())
#define all(a) a.begin(), a.end()
#define LL long long
#define ll __int128
#define DD double double
#define LD long double
#define rep(i,a,b) for(int i = (a);i <= (b);i ++)
#define lep(i,a,b) for(int i = (a);i >= (b);i --)
#define FLUSH fflush(stdout)
using namespace std;
const int N = 1e7 + 10,mod = 1e9+9,P = 131;
LL n,m,k;
LL qmi(LL a,LL b,LL p) {LL res = 1;while(b) {if(b&1) res = (LL)res*a%p;a = (LL)a*a%p;b >>= 1;}return res%p;}
LL f[N];
void solve() {
cin >> m >> k;
f[0] = 1;
LL ans = 0;
rep(i,1,k) {
ans = (ans + f[i-1]*m%mod) % mod;
LL inv = qmi(i*(m-1)+1,mod-2,mod);
f[i] = (f[i-1] + m*inv%mod) % mod;
}
cout << ans;
}
int main() {
ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
solve();
return 0;
}
/* /\_/\
* (= ._.)
* / > \>
*/
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3720kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3588kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 66ms
memory: 10428kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 756ms
memory: 57004kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3712kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 834ms
memory: 61032kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 461ms
memory: 37160kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1100ms
memory: 81220kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 200ms
memory: 19272kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 610ms
memory: 46484kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 364ms
memory: 28988kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 330ms
memory: 26612kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 968ms
memory: 71556kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1123ms
memory: 81752kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1116ms
memory: 81776kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1143ms
memory: 81824kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed