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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 |
---|---|---|---|---|---|---|---|---|---|
#667614 | #5139. DFS Order 2 | HHAZ | WA | 169ms | 7248kb | C++20 | 3.8kb | 2024-10-23 00:50:46 | 2024-10-23 00:50:46 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int,int>pii;
typedef pair<ll,ll>pll;
typedef pair<ld,ld>pdd;
typedef pair<ll, pair<ll, ll> > plpair;
typedef vector<int> vi;
typedef vector<ll> vl;
#define endl '\n'
#define rep(i, a, b) for (ll i = (a); i <= (b); ++i)
#define per(i, a, b) for(ll i = (a); i >= (b); --i)
#define debug(x) cout<<#x<<": "<<x<<endl
#define lowbit(id) id & (-id)
#define fi first
#define sec second
#define lc id<<1
#define rc id<<1|1
#define sz(x) (int)(x).size()
#define all(t) (t).begin(), (t).end()
#define meh {cout<<"NO"<<endl;return;}
#define yay {cout<<"YES"<<endl;return;}
#define vin(v) for(auto&x:v)cin>>x;
#define print(v) for (auto x: v)cout<<x<<' ';cout<<endl;
#define sqrt(x) sqrtl(x)
mt19937_64 rnd(chrono::steady_clock::now().time_since_epoch().count());
const ll N = 505;
const int mod = 998244353;
ll n;
ll dp[N][N], ans[N][N];
ll f[N], val[N], siz[N], son[N], g[N];
vector<ll>ve[N];
ll qsm(ll n,ll b, ll Mod = 998244353){
n = n % Mod;
ll s = 1,a = n;
while(b){
a = a % Mod;
if(b&1)
s = s * a;
b >>= 1;
a = a * a;
s = s % Mod;
}
return s;
}
void init_dfs(ll u, ll fa) {
siz[u]++;
ll j = 1;
for(auto v : ve[u]) {
if(v != fa) {
init_dfs(v, u);
siz[u] += siz[v];
son[u]++;
j *= val[v];
j %= mod;
}
}
val[u] = (j * f[son[u]]) % mod;
}
void dfs(ll u, ll fa) {
rep(i, 0, son[u]) {
rep(j, 0, siz[u]) {
dp[i][j] = 0;
}
}
dp[0][0] = 1;
ll d = 1;
for(auto v : ve[u]) {
if(v != fa) {
d *= val[v];
per(i, son[u], 1) {
per(j, siz[u], siz[v]) {
dp[i][j] += dp[i - 1][j - siz[v]];
dp[i][j] %= mod;
}
}
}
}
for(auto v : ve[u]) {
if(v != fa) {
rep(i, 0, 500) {
g[i] = 0;
}
rep(i, 1, son[u]) {
rep(j, siz[v], siz[u]) {
dp[i][j] -= dp[i - 1][j - siz[v]];
dp[i][j] = dp[i][j] % mod;
dp[i][j] += mod;
dp[i][j] %= mod;
// if(v==3 && dp[i][j]) cout << i << ' ' << j << ' ' << dp[i][j] << endl;
}
}
rep(i, 0, son[u] - 1) {
rep(j, 0, siz[u]) {
g[j] += ((((((dp[i][j] * f[i]) % mod) * f[son[u] - 1 - i]) % mod) * d) % mod);
g[j] %= mod;
// if(v==3 && dp[i][j]) cout << i << ' ' << j << ' ' << ((((dp[i][j] * f[i]) % mod) * f[son[u] - 1 - i]) % mod) * d % mod << endl;
}
}
// if(v==3)
ll sum = 0;
rep(j, 0, siz[u]) {
sum += g[j];
sum %= mod;
}
ll di = qsm(sum, mod - 2);
rep(i, 1, n) {
rep(j, i + 1, n) {
if(ans[u][i]) {
ans[v][j] += ((((g[j - i - 1] * di) % mod) * ans[u][i]) % mod);
ans[v][j] %= mod;
}
}
}
per(i, son[u], 1) {
per(j, siz[u], siz[v]) {
dp[i][j] += dp[i - 1][j - siz[v]];
dp[i][j] %= mod;
}
}
}
}
for(auto v : ve[u]) {
if(v != fa) {
dfs(v, u);
}
}
}
void solve() {
cin >> n;
f[0] = 1;
rep(i, 1, n) {
f[i] = f[i - 1] * i % mod;
}
rep(i, 2, n) {
ll u, v;
cin >> u >> v;
ve[u].push_back(v);
ve[v].push_back(u);
}
init_dfs(1, 0);
ans[1][1] = val[1];
dfs(1, 0);
rep(i, 1, n) {
rep(j, 1, n) {
cout << ans[i][j] << " \n"[j == n];
}
}
}
signed main() {
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int T = 1;
// cin >> T;
// cout.flush();
// ofstream outfile("C:\\Users\\86187\\OneDrive\\桌面\\1.txt");
// outfile << "a[1]=0;a[2]=1;";
// ll l = 1e7 + 1;
// rep(i, 3, 1e9) {
// printf("%lld\n", i);
// ll x = (i - 1) * ((a[i - 1] + a[i - 2]) % mod);
// x %= mod;
// if(i == l) {
// outfile << "a[" << i << "]=" << x << ";";
// }
// if(i == l + 1) {
// outfile << "a[" << i << "]=" << x << ";";
// l += 1e7;
// }
// }
while(T--) {
solve();
}
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 5720kb
input:
5 1 2 1 3 3 4 3 5
output:
4 0 0 0 0 0 2 0 0 2 0 2 2 0 0 0 0 1 2 1 0 0 1 2 1
result:
ok 25 numbers
Test #2:
score: 0
Accepted
time: 1ms
memory: 5816kb
input:
10 9 2 9 6 10 5 1 5 1 6 9 3 5 8 4 3 7 9
output:
24 0 0 0 0 0 0 0 0 0 0 0 0 4 2 2 8 2 2 4 0 0 0 4 4 4 4 4 4 0 0 0 0 0 4 4 4 4 4 4 0 12 0 0 0 0 0 12 0 0 0 12 0 0 12 0 0 0 0 0 0 0 0 4 2 2 8 2 2 4 0 0 6 6 0 0 0 0 6 6 0 0 12 0 0 12 0 0 0 0 0 0 6 6 0 0 0 0 6 6
result:
ok 100 numbers
Test #3:
score: 0
Accepted
time: 2ms
memory: 6104kb
input:
100 18 100 91 87 28 83 11 98 51 52 24 91 72 53 18 19 89 16 77 35 26 25 73 16 96 70 56 44 69 10 63 30 54 95 39 66 58 98 8 71 58 65 74 73 2 64 12 19 32 81 31 54 43 41 84 59 55 75 72 81 59 37 10 94 93 2 64 47 13 32 36 84 28 22 30 28 25 77 47 6 80 52 54 17 23 40 47 88 49 53 65 27 99 59 25 70 91 9 74 1 7...
output:
8388559 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 62914557 0 62914557 62914557 0 62914557 0 0 0 62914557 0 62914557 ...
result:
ok 10000 numbers
Test #4:
score: 0
Accepted
time: 117ms
memory: 5908kb
input:
500 382 156 418 376 91 15 142 274 449 174 375 82 118 175 421 458 361 222 14 474 11 324 368 341 227 424 231 249 81 435 250 271 118 38 147 61 124 408 135 1 244 316 301 80 39 313 90 118 290 465 465 250 277 341 8 105 319 373 305 379 309 200 180 398 47 489 463 259 173 492 494 343 251 193 111 32 401 270 4...
output:
219078761 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...
result:
ok 250000 numbers
Test #5:
score: -100
Wrong Answer
time: 169ms
memory: 7248kb
input:
500 164 415 76 333 437 167 184 28 281 491 40 64 184 6 407 459 141 469 370 186 226 142 165 243 26 175 442 345 496 451 351 277 467 136 42 10 14 435 109 202 22 267 354 312 232 273 141 158 219 356 329 405 212 65 345 166 378 79 114 224 213 79 371 23 454 276 150 9 82 291 24 111 157 396 22 475 268 163 57 8...
output:
744716203 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...
result:
wrong answer 508th numbers differ - expected: '814099510', found: '324777382'