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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#683423#8339. Rooted Treegoblin_team#AC ✓1101ms159944kbC++14994b2024-10-27 20:57:542024-10-27 20:57:55

Judging History

你现在查看的是最新测评结果

  • [2024-10-27 20:57:55]
  • 评测
  • 测评结果:AC
  • 用时:1101ms
  • 内存:159944kb
  • [2024-10-27 20:57:54]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

const ll mod = 1000000009;

ll m,k,sqr;

inline ll mpow(ll a, ll b) {
    ll ret = 1;
    for (; b; b >>= 1) {
        if (b & 1) {
            ret *= a;
            ret %= mod;
        }
        a = a * a;
        a%=mod;
    }
    return ret;
}

ll qpow(ll b, ll x){
    if(x==0) return 1;
    ll tmp = qpow(b,x/2);
    if(x&1) return tmp*tmp%mod*b%mod;
    else return tmp*tmp%mod; 
}

ll inv(ll x){
    return mpow(x%mod, mod-2);
}

ll invv[10000005];

ll calc(ll i){
    return sqr*invv[i]%mod;
}

ll diff[10000005];

int main(){
    // m=100; k=1e7;
    cin>>m>>k;
    diff[1] = m;
    sqr = m*m%mod;
    for(int i=2; i<=k; ++i) invv[i] = inv(ll(i-1)*(m-1)+1);
    for(int i=2; i<=k; ++i){
        diff[i] = (diff[i-1] + calc(i))%mod;
    }
    ll g = 0;
    for(int i=1; i<=k; ++i) {
        g+=diff[i];
        g%=mod;
    }
    cout<<g<<endl;
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 5548kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 1ms
memory: 5528kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 66ms
memory: 15884kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 734ms
memory: 113048kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 5688kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 811ms
memory: 118416kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 451ms
memory: 69180kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1086ms
memory: 159324kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 201ms
memory: 36004kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 582ms
memory: 89780kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 358ms
memory: 56368kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 318ms
memory: 51740kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 950ms
memory: 142300kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1093ms
memory: 159932kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1101ms
memory: 159884kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1093ms
memory: 159944kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed