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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#120391 | #5746. DAG Generation | UrgantTeam# | AC ✓ | 40ms | 4692kb | C++23 | 1.4kb | 2023-07-06 17:35:02 | 2023-07-06 17:35:05 |
Judging History
answer
#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define x first
#define y second
using namespace std;
typedef long double ld;
typedef long long ll;
const int MOD = (int) 1e9 + 9;
const int MAXN = 100000;
int fact[MAXN + 5], revfact[MAXN + 5], dp[MAXN + 5];
int binpow(int x, ll step)
{
int res = 1;
while (step > 0)
{
if (step & 1) res = (ll) res * x % MOD;
x = (ll) x * x % MOD;
step /= 2;
}
return res;
}
int rev(int x)
{
return binpow(x, MOD - 2);
}
int main()
{
//freopen("input.txt", "r", stdin);
//freopen("output.txt", "w", stdout);
ios_base::sync_with_stdio(0); cin.tie(0);
int test;
cin >> test;
fact[0] = 1;
for (int i = 1; i <= MAXN; i++) fact[i] = (ll) fact[i - 1] * i % MOD;
revfact[MAXN] = rev(fact[MAXN]);
for (int i = MAXN - 1; i >= 0; i--) revfact[i] = (ll) revfact[i + 1] * (i + 1) % MOD;
int mn = 1;
int zn = rev(2);
dp[0] = 1;
for (int i = 1; i <= MAXN; i++)
{
mn = (ll) mn * zn % MOD;
int sk = (1 - mn + MOD) % MOD;
dp[i] = (ll) 2 * dp[i - 1] * sk % MOD;
}
for (int rep = 1; rep <= test; rep++)
{
int n;
cin >> n;
int zn = revfact[n];
int ch2 = binpow(2, (ll) n * (n - 1) / 2);
int zn2 = rev(ch2);
int vc = (ll) zn * zn2 % MOD * dp[n] % MOD;
int ans = (1 - vc + MOD) % MOD;
cout << ans << '\n';
}
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 4652kb
input:
4 1 2 3 100
output:
0 375000004 117187502 778748905
result:
ok 4 number(s): "0 375000004 117187502 778748905"
Test #2:
score: 0
Accepted
time: 3ms
memory: 4692kb
input:
5 1 2 3 4 5
output:
0 375000004 117187502 213897708 995024095
result:
ok 5 number(s): "0 375000004 117187502 213897708 995024095"
Test #3:
score: 0
Accepted
time: 40ms
memory: 4544kb
input:
100000 64268 66535 9758 42907 84212 83488 27748 86198 80658 11614 93419 2528 96160 79473 83517 43109 37111 46603 93665 54540 84236 62717 24719 57225 8333 15728 40821 31719 13096 75018 76890 46244 75863 59618 67460 10326 84775 11276 83363 72071 9353 94316 9469 3969 78568 53071 96835 50125 2728 46756 ...
output:
517835222 425525315 415451955 804144524 465143750 248034271 13166687 703325946 341000020 13797696 905521918 608927142 591090671 501585335 146368913 172358003 116621710 241875456 448868678 155749600 350155635 599343092 400133403 78229211 452768218 582618783 811512224 912730301 470660521 250329917 370...
result:
ok 100000 numbers