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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#714613#8339. Rooted TreeAndevikingAC ✓1180ms3700kbC++201.4kb2024-11-06 01:01:312024-11-06 01:01:32

Judging History

你现在查看的是最新测评结果

  • [2024-11-06 01:01:32]
  • 评测
  • 测评结果:AC
  • 用时:1180ms
  • 内存:3700kb
  • [2024-11-06 01:01:31]
  • 提交

answer

#pragma GCC optimize(2)
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef __int128_t int128;
typedef pair<int, int> pii;
#define iofast    ios::sync_with_stdio(false), cin.tie(0), cout.tie(0)
#define lowbit(x) (x & (-x))
#define inv(x)    qpow(x, mod - 2)
#define debug(x)  cout << (#x) << " = " << x << endl
#define range(x)  (x).begin(), (x).end()

const int iINF = 0x3f3f3f3f;
const ll llINF = 0x3f3f3f3f3f3f3f3f;
const ll mod = 1000000009;

/*---------------------------------------*/
inline int add(int a, int b, const int mod = mod)
{
    return (a += b) >= mod ? a - mod : a;
}
inline int sub(int a, int b, const int mod = mod)
{
    return (a -= b) < 0 ? a + mod : a;
}
inline int mul(int a, int b, const int mod = mod)
{
    return 1ll * a * b % mod;
}
int qpow(int a, int b)
{
    int ans = 1;
    for (; b; b >>= 1) {
        if (b & 1)
            ans = mul(ans, a);
        a = mul(a, a);
    }
    return ans;
}
void solve()
{
    int m, k;
    cin >> m >> k;

    int f = 0;
    int tag = mul(m, m);
    int ans = 0;
    for (int i = 1; i <= k; ++i) {
        ans = add(ans, f);
        ans = add(ans, m);
        f = add(f, mul(tag, qpow(add(1, mul(i, (m - 1))), mod - 2)));
    }

    cout << ans << '\n';
}

/*---------------------------------------*/

int main()
{
    iofast;
    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: 3632kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3608kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 73ms
memory: 3616kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 788ms
memory: 3636kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

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

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 862ms
memory: 3632kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 485ms
memory: 3632kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1166ms
memory: 3620kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 213ms
memory: 3632kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 634ms
memory: 3624kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 379ms
memory: 3548kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 344ms
memory: 3636kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1017ms
memory: 3552kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1178ms
memory: 3544kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1174ms
memory: 3568kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1180ms
memory: 3544kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed