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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#543143#8339. Rooted TreeOldMemoryAC ✓1089ms159500kbC++14920b2024-09-01 14:23:202024-09-01 14:23:20

Judging History

你现在查看的是最新测评结果

  • [2024-09-01 14:23:20]
  • 评测
  • 测评结果:AC
  • 用时:1089ms
  • 内存:159500kb
  • [2024-09-01 14:23:20]
  • 提交

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