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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 |
---|---|---|---|---|---|---|---|---|---|
#713508 | #8339. Rooted Tree | foyonaczy | AC ✓ | 1156ms | 3716kb | C++20 | 770b | 2024-11-05 19:39:46 | 2024-11-05 19:39:47 |
Judging History
answer
#include<bits/stdc++.h>
#define endl '\n'
using i64 = long long;
constexpr i64 MOD = 1e9 + 9;
i64 binpow(i64 a, i64 b) {
i64 res = 1;
while (b) {
if (b & 1) res = (res * a) % MOD;
a = (a * a) % MOD;
b >>= 1;
}
return res;
}
void solve() {
i64 m, k;
std::cin >> m >> k;
i64 d = 0, ans = 0;
for (int i = 1; i <= k; i++) {
ans = (ans + (d + 1) % MOD * m % MOD) % MOD;
i64 sum = (i - 1) * (m - 1) % MOD;
d = (sum * d % MOD + m * (d + 1) % MOD) * binpow(sum + m, MOD - 2) % MOD;
}
std::cout << ans << '\n';
}
int main() {
std::ios::sync_with_stdio(false), std::cin.tie(nullptr);
int CZY = 1;
// std::cin >> CZY;
while (CZY--)solve();
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3716kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3576kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 71ms
memory: 3644kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 773ms
memory: 3640kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3584kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 841ms
memory: 3708kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 471ms
memory: 3592kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1147ms
memory: 3664kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 209ms
memory: 3660kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 627ms
memory: 3660kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 372ms
memory: 3604kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 338ms
memory: 3652kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 996ms
memory: 3584kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1156ms
memory: 3708kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1156ms
memory: 3580kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1156ms
memory: 3588kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed