#include<bits/stdc++.h>
#include<fstream>
using namespace std;
#define sz(a) (int)a.size()
#define ALL(v) v.begin(), v.end()
#define ALLR(v) v.rbegin(), v.rend()
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
#define mpp make_pair
const ld PI = 3.14159265359, prec = 1e-9;;
//using u128 = __uint128_t;
const int cox[4] = {1, 0, -1, 0};
const int coy[4] = {0, -1, 0, 1};
const ll mod = 998244353, pr = 31;
const int mxn = 1e4 + 5, mxs = 3e5 * 50, sq = 500, mxv = 100 + 1;
const int max_iter = 8e4, global_iter = 15e5 + 5;
//const int base = (1 <<18);
const ll inf = 1e9 + 5, neg = -69420, inf2 = 1e14;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
int n;
bitset<mxv>dp[10005][105], pre[10005][105];
int v[mxn + 1];
vt<int>adj[mxn + 1];
void dfs(int s, int p){
for(auto i: adj[s]){
if(i != p){
dfs(i, s);
for(int j = 1; j <= 100; j++){
for(int k = j; k <= 100; k++){
if(dp[i][j][k]){
dp[s][j][k] = 1;
for(int l = k + 1; l <= 100; l++){
if(pre[s][k + 1][l])dp[s][j][l] = 1;
}
for(int l = j - 1; l >= 1; l--){
if(pre[s][l][j - 1])dp[s][l][k] = 1;
}
}
}
}
for(int j = 1; j <= 100; j++){
for(int k = j; k <= 100; k++){
pre[s][j][k] = dp[s][j][k];
}
}
}
}
pre[s][v[s]][v[s] - 1] = pre[s][v[s] + 1][v[s]] = 1;
for(int i = 1; i <= 100; i++){
for(int j = i; j <= 100; j++){
if(i <= v[s] && j >= v[s] && pre[s][i][v[s] - 1] && pre[s][v[s] + 1][j]){
dp[s][i][j] = 1;
}else{
dp[s][i][j] = 0;
}
}
}
}
void solve(){
cin >> n;
for(int i = 1; i <= n; i++)cin >> v[i];
for(int i = 1; i < n; i++){
int a, b; cin >> a >> b;
adj[a].pb(b); adj[b].pb(a);
}
dfs(1, -1);
int res = 0;
for(int i = 1; i <= 100; i++){
for(int j = i; j <= 100; j++){
res += dp[1][i][j];
}
}
cout << res;
}
signed main(){
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
//freopen("KHONG.inp", "r", stdin);
//freopen("KHONG.out", "w", stdout);
int tt; tt = 1;
while(tt--)solve();
return(0);
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
856 KB |
Output is correct |
| 2 |
Correct |
2 ms |
860 KB |
Output is correct |
| 3 |
Incorrect |
2 ms |
860 KB |
Output isn't correct |
| 4 |
Correct |
2 ms |
756 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1036 KB |
Output is correct |
| 6 |
Correct |
3 ms |
860 KB |
Output is correct |
| 7 |
Correct |
3 ms |
860 KB |
Output is correct |
| 8 |
Correct |
3 ms |
860 KB |
Output is correct |
| 9 |
Correct |
3 ms |
844 KB |
Output is correct |
| 10 |
Correct |
3 ms |
860 KB |
Output is correct |
| 11 |
Runtime error |
244 ms |
33872 KB |
Memory limit exceeded |
| 12 |
Runtime error |
235 ms |
33784 KB |
Memory limit exceeded |
| 13 |
Runtime error |
240 ms |
33872 KB |
Memory limit exceeded |
| 14 |
Runtime error |
271 ms |
35788 KB |
Memory limit exceeded |
| 15 |
Runtime error |
254 ms |
35828 KB |
Memory limit exceeded |
| 16 |
Runtime error |
263 ms |
35668 KB |
Memory limit exceeded |
| 17 |
Runtime error |
238 ms |
33872 KB |
Memory limit exceeded |
| 18 |
Runtime error |
230 ms |
33876 KB |
Memory limit exceeded |
| 19 |
Runtime error |
253 ms |
33744 KB |
Memory limit exceeded |
| 20 |
Runtime error |
245 ms |
33876 KB |
Memory limit exceeded |
