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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 |
---|---|---|---|---|---|---|---|---|---|
#658698 | #5139. DFS Order 2 | juan_123 | WA | 350ms | 7596kb | C++14 | 2.5kb | 2024-10-19 17:24:32 | 2024-10-19 17:24:33 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
const int mod = 998244353;
int qp(int p,int q){
int ans = 1,pro = p;
while(q){
if(q&1)ans = ans*pro%mod;
pro = pro*pro%mod;q>>=1;
}
return ans;
}
int dp[505][505],sz[505];
vector<int>p[505];
int jie[505];
int f[505][505],g[505];
int n;
void dfs1(int now,int fa){
g[now] = 1;
sz[now]=1;
int tt =0 ;
for(auto x:p[now])if(x!=fa){
dfs1(x,now),sz[now]+=sz[x];
++tt;g[now] = g[now]*g[x]%mod;
}
g[now] = g[now]*jie[tt]%mod;
}
void dfs(int now,int fa){
vector<int>s;//s.push_back(0);
int pro = 1;
for(auto x:p[now]){
if(x!=fa)s.push_back(sz[x]),pro = pro*g[x]%mod;
}
for(int i =0;i<=s.size();i++)for(int j =0;j<=sz[now];j++)f[i][j]=0;
f[0][0] = 1;
for(int i =0;i<s.size();i++){
for(int j = i+1;j>=1;j--){
for(int k = sz[now];k>=s[i];k--){
f[j][k] = (f[j][k]+f[j-1][k-s[i]])%mod;
}
}
}
// cout << " " << now << endl;
//for(int i =0;i<=s.size();i++){
// for(int j =0;j<=sz[now];j++){
// cout << f[i][j] << " ";
// }
// cout << endl;
// }
// cout << endl;
int l =0;
for(auto x:p[now]){
if(x==fa)continue;
for(int j = 1;j<=s.size();j++){
for(int k = s[l];k<=sz[now];k++){
f[j][k] = (f[j][k]-f[j-1][k-s[l]]+mod)%mod;
}
}
int p = pro*qp(g[x],mod-2)%mod;
// cout << " " << now << " " << x << " " << p << endl;
// for(int i =0;i<=s.size();i++){
// for(int j =0;j<=sz[now];j++){
// cout << f[i][j] << " ";
// }
// cout << endl;
// }
for(int i = 1;i<=n;i++){
for(int j = 0;j<s.size();j++){
for(int k = 0;k<=sz[now];k++){
// cout <<" " << i+k+1 << " " << f[j][k] <<" " << dp[now][i] << " " << jie[j]*jie[s.size()-j-1]*p%mod << endl;
dp[x][i+k+1] = (dp[x][i+k+1]+f[j][k]*dp[now][i]%mod*jie[j]%mod*jie[s.size()-j-1]*p%mod)%mod;
}
}
}
for(int j = s.size();j>=1;j--){
for(int k = sz[now];k>=s[l];k--){
f[j][k] = (f[j][k]+f[j-1][k-s[l]])%mod;
}
}
++l;
}
for(auto x:p[now])if(x!=fa)dfs(x,now);
}
signed main(){
cin >> n;
jie[0]=1;for(int i = 1;i<=n;i++)jie[i]=jie[i-1]*i%mod;
for(int i = 1;i<n;i++){
int a,b;cin >>a >> b;
p[a].push_back(b),p[b].push_back(a);
}
dp[1][1] = 1;
dfs1(1,1);
// for(int i = 1;i<=n;i++)cout << " " << g[i];cout << endl;
dfs(1,1);
for(int i =1;i<=n;i++){
for(int j = 1;j<=n;j++)dp[i][j]=dp[i][j]*g[i]%mod;
}
for(int i = 1;i<=n;i++){
for(int j = 1;j<=n;j++)cout << dp[i][j] << " ";
cout << endl;
}
return 0;
}/*
5
1 2
1 3
3 4
3 5
*/
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 5528kb
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: 5780kb
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: 3ms
memory: 5512kb
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: 350ms
memory: 6208kb
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: 0
Accepted
time: 165ms
memory: 7300kb
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:
ok 250000 numbers
Test #6:
score: -100
Wrong Answer
time: 217ms
memory: 7596kb
input:
500 177 65 367 41 19 51 1 131 95 135 410 397 30 109 357 209 172 357 195 199 167 297 437 232 63 12 194 387 309 12 235 112 32 359 143 66 267 397 467 224 199 383 226 310 435 3 300 206 151 189 198 398 226 287 322 467 244 280 273 9 44 305 273 32 398 15 14 117 199 290 313 76 85 80 34 348 146 458 261 233 2...
output:
171992689 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 504th numbers differ - expected: '746838953', found: '381910854'