#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <queue>
#include <cassert>
#include <string>
#include <cstring>
#include <bitset>
#include <random>
#include <chrono>
#include <iomanip>
/*
#pragma GCC optimize ("Ofast")
#pragma GCC target("fma,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#pragma GCC optimize("unroll-loops")
*/
#define FOR(i, a, b) for(int i = a; i < (int) b; i++)
#define F0R(i, a) FOR (i, 0, a)
#define ROF(i, a, b) for(int i = a; i >= (int) b; i--)
#define R0F(i, a) ROF(i, a, 0)
#define GO(i, a) for (auto i : a)
#define rsz resize
#define eb emplace_back
#define pb push_back
#define sz(x) (int) x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define f first
#define s second
using namespace std;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<pii> vpii;
typedef vector<vi> vvi;
typedef vector<vpii> vvpii;
typedef long long i64;
typedef vector<i64> vi64;
typedef vector<vi64> vvi64;
typedef pair<i64, i64> pi64;
typedef vector<pi64> vpi64;
const int dr[] = {+1, -1, +0, +0, +1, -1, +1, -1};
const int dc[] = {+0, +0, +1, -1, +1, -1, -1, +1};
const int ms[] = {+31, +29, +31, 30, +31, +30, +31, +31, +30, +31, +30, +31};
// It should something like -> O ( N * V ^ 3 ), 50 pts
const int N = 1e4 + 1;
const int V = 1e2 + 1;
vvi g (N);
// We are dealing with sets. No duplicates allowed. This is why bitset is correct.
bitset<V> dp [N][V];
bitset<V> Get [V];
int joke [N];
void dfs (int node = 0) {
GO (to, g[node]) {
dfs (to);
}
dp[node][joke[node]][joke[node]] = 1;
F0R (i, V) Get[i].reset();
GO (to, g[node]) {
FOR (x, 1, V) {
Get[x] = (Get[x] | dp[to][x]);
}
}
for (int tamanho = 1; tamanho < V; tamanho++) {
for (int L = 1; L + tamanho < V; L++) {
const int R = L + tamanho; // Inclusive
for (int k = L; k <= R / 2 + 5; k++) {
bool ansA = (dp[node][L][k] & Get[k + 1][R]);
bool ansB = (Get[L][k] & dp[node][k + 1][R]);
dp[node][L][R] = (dp[node][L][R] | ansA);
dp[node][L][R] = (dp[node][L][R] | ansB);
if (ansA || ansB) break;
}
}
}
}
int main () {
ios::sync_with_stdio(0);
cin.tie(0);
int n;
cin >> n;
F0R (i, n) cin >> joke[i];
F0R (i, n - 1) {
int st, et;
cin >> st >> et;
--st; --et;
g[st].eb(et);
}
dfs ();
int res = 0;
FOR (i, 1, V) res += dp[0][i].count();
cout << res << '\n';
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
15 ms |
640 KB |
Output is correct |
| 2 |
Correct |
21 ms |
640 KB |
Output is correct |
| 3 |
Correct |
21 ms |
768 KB |
Output is correct |
| 4 |
Correct |
21 ms |
768 KB |
Output is correct |
| 5 |
Correct |
25 ms |
768 KB |
Output is correct |
| 6 |
Incorrect |
25 ms |
768 KB |
Output isn't correct |
| 7 |
Incorrect |
25 ms |
768 KB |
Output isn't correct |
| 8 |
Incorrect |
25 ms |
768 KB |
Output isn't correct |
| 9 |
Incorrect |
26 ms |
768 KB |
Output isn't correct |
| 10 |
Incorrect |
26 ms |
768 KB |
Output isn't correct |
| 11 |
Execution timed out |
1091 ms |
14840 KB |
Time limit exceeded |
| 12 |
Execution timed out |
1096 ms |
14888 KB |
Time limit exceeded |
| 13 |
Execution timed out |
1099 ms |
14968 KB |
Time limit exceeded |
| 14 |
Execution timed out |
1094 ms |
10560 KB |
Time limit exceeded |
| 15 |
Execution timed out |
1098 ms |
10744 KB |
Time limit exceeded |
| 16 |
Execution timed out |
1097 ms |
10744 KB |
Time limit exceeded |
| 17 |
Execution timed out |
1095 ms |
14840 KB |
Time limit exceeded |
| 18 |
Execution timed out |
1095 ms |
15028 KB |
Time limit exceeded |
| 19 |
Execution timed out |
1096 ms |
9080 KB |
Time limit exceeded |
| 20 |
Execution timed out |
1094 ms |
9208 KB |
Time limit exceeded |
