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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#540806#8339. Rooted TreeEqvpkbz#AC ✓1125ms3708kbC++20856b2024-08-31 17:53:542024-08-31 17:53:54

Judging History

This is the latest submission verdict.

  • [2024-08-31 17:53:54]
  • Judged
  • Verdict: AC
  • Time: 1125ms
  • Memory: 3708kb
  • [2024-08-31 17:53:54]
  • Submitted

answer

#include <bits/stdc++.h>

using namespace std;

#define int long long

const int P = 1e9 + 9;

int qpow(int a, int b) {
    int res = 1ll;
    for(int base = a % P; b; base = (base * base) % P, b >>= 1ll) {
        if (b & 1ll) res = (res * base) % P;
    }
    return res;
}

void solve() {
    int M, K; cin >> M >> K;
    int cur = 0, ans = 0;
    for(int i = 0; i < K; ++ i) {
        ans = (ans + (cur + 1) * M % P) % P;
        cur = (cur + M * qpow(M * (i + 1) - i, P - 2ll) % P) % P;
    }
    cout << ans << "\n";
    // cout << 34 * qpow(3, P - 2ll) % P << "\n";
    // cout << 5 * qpow(3, P - 2ll) % P << "\n";
    return ;
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr), cout.tie(nullptr);
    int T = 1; 
    // 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: 3616kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3700kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 70ms
memory: 3700kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 756ms
memory: 3632kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3576kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 821ms
memory: 3628kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 461ms
memory: 3708kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1115ms
memory: 3624kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 203ms
memory: 3660kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 609ms
memory: 3556kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 361ms
memory: 3704kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 329ms
memory: 3620kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 968ms
memory: 3708kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1125ms
memory: 3556kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1120ms
memory: 3572kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1120ms
memory: 3576kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed