//#pragma GCC optimize("Ofast,no-stack-protector")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("fast-math")
/*#pragma GCC optimize("section-anchors")
#pragma GCC optimize("profile-values,profile-reorder-functions,tracer")
#pragma GCC optimize("vpt")
#pragma GCC optimize("rename-registers")
#pragma GCC optimize("move-loop-invariants")
#pragma GCC optimize("unswitch-loops")
#pragma GCC optimize("function-sections")
#pragma GCC optimize("data-sections")
#pragma GCC optimize("branch-target-load-optimize")
#pragma GCC optimize("branch-target-load-optimize2")
#pragma GCC optimize("btr-bb-exclusive")*/
//#pragma comment(linker, "/STACK:367077216")
#define _CRT_SECURE_NO_WARNINGS
#include <chrono>
#include <set>
#include <map>
#include <deque>
#include <string>
#include <cstdint>
#include <cmath>
#include <queue>
#include <cassert>
#include <random>
#include <bitset>
#include <iomanip>
#include <numeric>
#include <time.h>//////////////
#include <ctime>
#include <string>
#include <cstdio>
#include <vector>
#include <cstdlib>
#include <iostream>
#include <algorithm>
#include <unordered_map>
#include <unordered_set>
//++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++
//#define endl '\n'
#define mp make_pair
#define pbc push_back
#define pob pop_back()
#define empb emplace_back
#define queuel queue<long long>
#define sqr(a) ((a) * (a))
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define pin(p) cin >> p.first >> p.second;
#define uniq(a) sort(all(a));(a).resize(unique(all(a)) - a.begin());
#define rev(v) reverse(v.begin(), v.end());
#define sout(s, c) for (auto i : s) cout << i << c;
#define pout(p) cout << p.first << " " << p.second;
#define er(v, l, r) erase(v.begin() + l, v.begin() + r);
#define vin(v) for (ll i = 0; i < v.size(); ++i) cin >> v[i];
#define vout(v, c) for (int i = 0; i < v.size(); ++i) cout << v[i] << c;
#define pushi(v, a) for (int i = 0; i < a.size(); ++i) v.push_back(a[i]);
#define fastio() ios_base::sync_with_stdio(0); cout.tie(0); cin.tie(0); srand(time(NULL))
#define dab(v) for(auto i:v)cout<<i<<' ';
#define sp system("pause")
//++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++
using namespace std;
//++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
//++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++
mt19937 rnd(time(0) + 228 + 'k' + 'e' + 'k' + 'e' + 'r' + 'o' + 'f' + 'e' + 'y');
const ld EPS = 1e-5;//(cos,-sin), (sin, cos)
bool checkprime(int x)
{
for (int i = 2; i * i <= x; ++i) if (x % i == 0) return 0;
return 1;
}
const ld PI = acos(-1);
const int MOD7 = 1000000007;
const int MOD9 = 1000000009;
const ll INF = 1e18;
int mod = MOD7;
const int inf = 1e9;
const int MAXN = 2e4 + 1;
vector<int> g[MAXN];
int a[MAXN];
int n;
const int MAXV = 101;
pair<int, int> now;
int ans = 0;
int used[MAXV];
inline bool bel(pair<int, int> a, int b)
{
return b >= a.first && b <= a.second;
}
void dfs(int v)
{
if (!bel(now, a[v])) return;
used[a[v]] = 1;
int nw = 1;
for (int i : g[v])
{
if (!bel(now, a[i])) continue;
if (a[i] >= a[v] && a[i] <= a[v] + nw)
{
if (a[i] == a[v] + nw) ++nw;
dfs(i);
}
}
rev(g[v]);
nw = 1;
for (int i : g[v])
{
if (a[i] < a[v] && a[i] >= a[v] - nw)
{
if (a[i] == a[v] - nw) ++nw;
dfs(i);
}
}
rev(g[v]);
}
signed main()
{
fastio();
cin >> n;
for (int i = 1; i <= n; ++i) cin >> a[i];
for (int i = 0; i < n - 1; ++i)
{
int a, b;
cin >> a >> b;
g[a].pbc(b);
}
for (int i = 1; i <= n; ++i)
{
sort(all(g[i]), [&](int aa, int bb) {return a[aa] < a[bb]; });
}
for (int fs = 1; fs < MAXV; ++fs)
{
for (int ss = fs; ss <= MAXV; ++ss)
{
fill(used, used + MAXV, 0);
now = { fs,ss };
dfs(1);
if (count(used, used + MAXV, 1) == ss - fs + 1)
{
++ans;
}
}
}
cout << ans;
//sp;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
896 KB |
Output isn't correct |
| 2 |
Correct |
6 ms |
896 KB |
Output is correct |
| 3 |
Incorrect |
5 ms |
768 KB |
Output isn't correct |
| 4 |
Incorrect |
5 ms |
768 KB |
Output isn't correct |
| 5 |
Incorrect |
6 ms |
896 KB |
Output isn't correct |
| 6 |
Correct |
6 ms |
896 KB |
Output is correct |
| 7 |
Correct |
8 ms |
896 KB |
Output is correct |
| 8 |
Correct |
7 ms |
768 KB |
Output is correct |
| 9 |
Incorrect |
6 ms |
896 KB |
Output isn't correct |
| 10 |
Incorrect |
5 ms |
768 KB |
Output isn't correct |
| 11 |
Incorrect |
9 ms |
1024 KB |
Output isn't correct |
| 12 |
Correct |
8 ms |
1024 KB |
Output is correct |
| 13 |
Correct |
13 ms |
1024 KB |
Output is correct |
| 14 |
Correct |
9 ms |
1152 KB |
Output is correct |
| 15 |
Correct |
9 ms |
1152 KB |
Output is correct |
| 16 |
Correct |
10 ms |
1152 KB |
Output is correct |
| 17 |
Correct |
16 ms |
1024 KB |
Output is correct |
| 18 |
Correct |
11 ms |
1024 KB |
Output is correct |
| 19 |
Incorrect |
251 ms |
1016 KB |
Output isn't correct |
| 20 |
Incorrect |
252 ms |
896 KB |
Output isn't correct |
