QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#543143 | #8339. Rooted Tree | OldMemory | AC ✓ | 1089ms | 159500kb | C++14 | 920b | 2024-09-01 14:23:20 | 2024-09-01 14:23:20 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
typedef pair<int, int> PII;
typedef long long LL;
const int INF = 0x3f3f3f3f3f3f3f3f, mod = 1e9 + 9;
bool multi = 0;
long long qpow(long long a,long long b,long long p){
a%=p;
long long res=1%p;
while(b){
if(b&1) res=res*a%p;
a=a*a%p;
b>>=1;
}
return res;
}
void solve(){
int m, k;
cin >> m >> k;
vector<int> f(k + 1), dp(k + 1);
f[0] = 1;
int ans = 0;
for(int i = 1; i <= k; i++) {
f[i] = (f[i - 1] - 1 + m) % mod;
dp[i] = (dp[i - 1] + m * qpow(f[i], mod - 2, mod)) % mod;
ans = (ans + (dp[i - 1] + 1) * m) % mod;
}
cout << ans << '\n';
}
signed main(){
ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
int T = 1;
if(multi) cin >> T;
while(T--) {
solve();
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3592kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3784kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 69ms
memory: 12604kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 729ms
memory: 108000kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3476kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 794ms
memory: 117096kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 450ms
memory: 67048kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1081ms
memory: 157976kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 198ms
memory: 31328kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 582ms
memory: 87700kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 347ms
memory: 53284kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 313ms
memory: 48776kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 939ms
memory: 137568kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1082ms
memory: 159500kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1089ms
memory: 159232kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1086ms
memory: 159292kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed