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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 |
---|---|---|---|---|---|---|---|---|---|
#348071 | #8339. Rooted Tree | ucup-team3215# | AC ✓ | 1182ms | 3740kb | C++20 | 606b | 2024-03-09 16:49:09 | 2024-03-09 16:49:10 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
constexpr int mod = 1e9 + 9;
auto& mul(auto&& a, auto b) { return a = a * (uint64_t)b % mod; }
auto& add(auto&& a, auto b) { return a = (a + b) % mod; }
int fpow(int a, int b) { for (int r = 1; ; b /= 2, mul(a, a)) if (!b) return r; else if (b % 2) mul(r, a); }
int main() {
cin.tie(0)->sync_with_stdio(0);
int m, n; cin >> m >> n;
int l = 0, s = 0;
for (int i = 0; i < n; ++i) {
int t = fpow((m - 1) * i + 1, mod - 2);
add(s, mul(+m, 1 + mul(+l, t)));
add(mul(l, 1 + mul(m - 1, t)), m);
}
cout << s << '\n';
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3736kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3600kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 73ms
memory: 3604kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 794ms
memory: 3608kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 863ms
memory: 3652kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 485ms
memory: 3668kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1174ms
memory: 3672kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 214ms
memory: 3728kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 641ms
memory: 3604kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 380ms
memory: 3688kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 345ms
memory: 3640kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 1018ms
memory: 3608kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1179ms
memory: 3728kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1182ms
memory: 3668kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1178ms
memory: 3740kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed