QOJ.ac
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 |
---|---|---|---|---|---|---|---|---|---|
#369356 | #8339. Rooted Tree | Giga_Cronos# | AC ✓ | 1024ms | 3708kb | C++23 | 1.9kb | 2024-03-28 03:31:21 | 2024-03-28 03:31:22 |
Judging History
answer
// #pragma GCC optimize("Ofast,no-stack-protector,unroll-loops", \
// "omit-frame-pointer", "inline")
// #pragma GCC target( \
// "sse,sse2,sse3,ssse3,sse4,sse4.1,sse4.2,popcnt,abm,mmx,avx,avx2,fma,tune=native")
// #pragma GCC option("arch=native", "no-zero-upper") // Enable AVX
/// UH Top
#include <bits/stdc++.h>
#define db(x) cerr << #x << ':' << (x) << '\n';
#define all(v) (v).begin(), (v).end()
#define allr(v) (v).rbegin(), (v).rend()
// #define int ll
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
// typedef __int128_t int128;
typedef pair<ll, ll> pii;
typedef pair<ld, ll> pdi;
typedef pair<ld, ld> pdd;
typedef pair<ld, pdd> pdp;
typedef pair<string, ll> psi;
typedef pair<ll, string> pls;
typedef pair<string, string> pss;
typedef pair<ll, pii> pip;
typedef pair<pii, pii> ppp;
typedef complex<ld> point;
typedef vector<point> polygon;
typedef vector<ll> vi;
typedef pair<point, int> ppi;
#define prec(n) \
cout.precision(n); \
cout << fixed
const ll mod = (1e9 + 9);
const ld eps = (1e-9);
const ll oo = (ll)(1e9 + 5);
#define pi acos(-1)
#define MAXN (ll)(1e6 + 5)
ll qp(ll b, ll e) {
ll ans = 1;
while (e) {
if (e & 1)
ans = (ans * b) % mod;
e >>= 1;
b = (b * b) % mod;
}
return ans;
}
int32_t main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
ll m, k;
cin >> m >> k;
ll x = 0;
ll ans = 0;
ll cant = 1;
for (int i = 0; i < k; i++) {
ll den = qp(cant + m - 1, mod - 2);
ans = (ans + (x + 1) * m) % mod;
x = (x * (cant - 1) + (x + 1) * m) % mod;
x = (x * den) % mod;
cant += m - 1;
// cout << (x * cant) % mod << "\n";
}
cout << ans << "\n";
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 3564kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 1ms
memory: 3612kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 63ms
memory: 3572kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 694ms
memory: 3660kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3612kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 749ms
memory: 3628kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 420ms
memory: 3708kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1014ms
memory: 3568kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 185ms
memory: 3576kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 550ms
memory: 3612kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 329ms
memory: 3548kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 299ms
memory: 3672kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 878ms
memory: 3648kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1024ms
memory: 3652kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1024ms
memory: 3700kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1024ms
memory: 3620kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed