oj.uz

Submission #98657

# Submission time Handle Problem Language Result Execution time Memory
98657 2019-02-25T02:51:08 Z minhtung0404 Uzastopni (COCI15_uzastopni) C++17
160 / 160
 23 ms 3712 KB 
//https://oj.uz/problem/view/COCI15_uzastopni

#include<bits/stdc++.h>
const int N = 1e4 + 5;
using namespace std;

vector <int> G[N];
int n, a[N];
bool ck[2][N], l[N][100], r[N][100];

void dfs(int u){
    for (auto v : G[u]) dfs(v);
    l[u][a[u]] = r[u][a[u]] = true;
    for (int i = a[u]; i > 0; i--) if (l[u][i]){
        for (auto v : G[u]) if (!ck[0][v] && r[v][i-1]) {
            ck[0][v] = true;
            for (int i = 0; i < 100; i++) l[u][i] = max(l[u][i], l[v][i]);
        }
    }
    for (int i = a[u]; i < 99; i++) if (r[u][i]){
        for (auto v : G[u]) if (!ck[1][v] && l[v][i+1]) {
            ck[1][v] = true;
            for (int i = 0; i < 100; i++) r[u][i] = max(r[u][i], r[v][i]);
        }
    }
//    cout << u << "\n";
//    for (int i = 0; i < 100; i++) if (l[u][i]) cout << i << " "; cout << "\n";
//    for (int i = 0; i < 100; i++) if (r[u][i]) cout << i << " "; cout << "\n";
//    cout << "\n";
}

int main(){
    cin >> n;
    for (int i = 1; i <= n; i++) cin >> a[i], a[i]--;
    for (int i = 2; i <= n; i++){
        int u, v; cin >> u >> v;
        G[u].push_back(v);
    }
    dfs(1);
    int cnt1 = 0, cnt2 = 0;
    for (int i = 0; i < 100; i++) if (l[1][i]) cnt1++;
    for (int i = 0; i < 100; i++) if (r[1][i]) cnt2++;
    cout << cnt1 * cnt2;
}

Subtask #1
160.0 / 160.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 512 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 3 ms 512 KB Output is correct
4 Correct 3 ms 512 KB Output is correct
5 Correct 2 ms 612 KB Output is correct
6 Correct 2 ms 640 KB Output is correct
7 Correct 3 ms 612 KB Output is correct
8 Correct 3 ms 640 KB Output is correct
9 Correct 3 ms 640 KB Output is correct
10 Correct 2 ms 640 KB Output is correct
11 Correct 18 ms 2780 KB Output is correct
12 Correct 17 ms 2820 KB Output is correct
13 Correct 20 ms 2816 KB Output is correct
14 Correct 16 ms 3704 KB Output is correct
15 Correct 17 ms 3704 KB Output is correct
16 Correct 17 ms 3712 KB Output is correct
17 Correct 17 ms 2944 KB Output is correct
18 Correct 17 ms 2816 KB Output is correct
19 Correct 23 ms 2664 KB Output is correct
20 Correct 19 ms 2680 KB Output is correct