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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 |
---|---|---|---|---|---|---|---|---|---|
#417213 | #8339. Rooted Tree | Mobed# | AC ✓ | 1228ms | 3628kb | C++14 | 833b | 2024-05-22 16:17:26 | 2024-05-22 16:17:27 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
const int inf = 1e9 + 1;
const int MOD = 1e9 + 9;
const int N = 1e5 + 5;
int sum(int a, int b) { return (0ll + a + b + MOD) % MOD; }
int mul(int a, int b) { return 1ll * a * b % MOD; }
int Pow(int a, int b) {
int res = 1;
for (; b; b>>=1, a = mul(a, a)) if (b&1) {
res = mul(res, a);
}
return res;
}
void Solve() {
int M, K; cin >> M >> K;
int e = 0;
int s = 0;
for (int i = 0; i < K; i++) {
s = sum(s, sum(mul(e, M), M));
e = sum(e, mul(M, Pow(mul(M-1,i+1)+1, MOD-2)));
}
cout << s << "\n";
}
int main() {
// prep();
// cout << C(5, 4) << endl;
ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
int t = 1; // cin >> t;
while (t--) {
Solve();
}
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3600kb
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: 69ms
memory: 3600kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 825ms
memory: 3628kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3564kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 897ms
memory: 3528kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 506ms
memory: 3468kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1218ms
memory: 3600kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 222ms
memory: 3600kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 665ms
memory: 3604kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 395ms
memory: 3572kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 359ms
memory: 3568kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 1057ms
memory: 3600kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1224ms
memory: 3468kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1228ms
memory: 3568kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1226ms
memory: 3492kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed