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 |
---|---|---|---|---|---|---|---|---|---|
#709594 | #8339. Rooted Tree | yu7uan | AC ✓ | 1155ms | 159908kb | C++17 | 831b | 2024-11-04 15:41:11 | 2024-11-04 15:41:12 |
Judging History
answer
#include<bits/stdc++.h>
#define rep(i, a, b) for(int i = (a); i <= (b); i ++)
#define int long long
using namespace std;
const int M = 1e7 + 5, MOD = 1e9 + 9;
int f[M], s[M];
int qmi(int a, int b){
int res = 1;
while(b){
if(b & 1) res = res * a % MOD;
a = a * a % MOD;
b >>= 1;
}
return res;
}
void sol(){
int m, k;
cin >> m >> k;
if(k == 1){
cout << m << "\n";
return ;
}
int n = 1;
f[1] = 1;
rep(i, 2, k){
n = (n + m - 1) % MOD;
f[i] = (f[i - 1] + m * qmi((n + m - 1) % MOD, MOD - 2) % MOD) % MOD;
}
rep(i, 1, k){
s[i] = (s[i - 1] + (f[i] + 1) * m % MOD) % MOD;
}
cout << (s[k - 1] + m) % MOD << "\n";
return ;
}
signed main(){
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int T = 1;
// cin >> T;
while(T --){
sol();
}
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 1ms
memory: 5632kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 1ms
memory: 5708kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 72ms
memory: 15000kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 778ms
memory: 111520kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 1ms
memory: 5632kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 839ms
memory: 121996kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 472ms
memory: 68888kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1155ms
memory: 159856kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 211ms
memory: 34760kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 601ms
memory: 89424kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 348ms
memory: 56500kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 322ms
memory: 52736kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 991ms
memory: 142008kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1117ms
memory: 159832kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1125ms
memory: 159908kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1133ms
memory: 159832kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed