oj.uz

Submission #781042

# Submission time Handle Problem Language Result Execution time Memory
781042 2023-07-12T16:20:35 Z cig32 Kutije (COCI21_kutije) C++17
70 / 70
 147 ms 26052 KB 
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1001;

    vector<int> adj[MAXN], adj2[MAXN], adj3[MAXN];
bool vis[MAXN];
stack<int> topolo;
void dfs1(int node) {
    vis[node] = 1;
    for(int x: adj[node]) {
        if(!vis[x]) dfs1(x);
    }
    topolo.push(node);
}
vector<vector<int> > components;
vector<int> wow;
void dfs2(int node) {
    vis[node] = 1;
    for(int x : adj2[node]) {
        if(!vis[x]) dfs2(x);
    }
    wow.push_back(node);
}
void dfs3(int node) {
    vis[node] = 1;
    for(int x : adj3[node]) {
        if(!vis[x]) dfs3(x);
    }
    topolo.push(node);
}
int main() {
    ios::sync_with_stdio(0); cin.tie(0);
    int n, m, q; cin >> n >> m >> q;
    int ans[n+1][n+1];
    for(int i=1; i<=n; i++) {
        for(int j=1; j<=n; j++) {
            ans[i][j] = 0;
        }
    }
    for(int i=1; i<=m; i++) {
        for(int j=1; j<=n; j++) {
            int x; cin >> x;
            adj[x].push_back(j);
            adj2[j].push_back(x);
        }
    }
    for(int i=1; i<=n; i++) {
        if(!vis[i]) {
            dfs1(i);
        }
    }
    for(int i=1; i<=n; i++) {
        vis[i] = 0;
    }
    int dage[n+1];
    while(topolo.size()) {
        if(!vis[topolo.top()]){
            vis[topolo.top()]=1;
            wow.clear();
            dfs2(topolo.top());
            for(int x : wow) {
                for(int y : wow) {
                    ans[x][y] = 1;
                }
            }
            for(int x : wow) {
                dage[x] = wow[0];
            }
            components.push_back(wow);
        }
        topolo.pop();
    }
    int done[n+1][n+1];
    for(int i=1; i<=n; i++) {
        for(int j=1; j<=n; j++) {
            done[i][j] = 0;
        }
    }
    for(int i=1; i<=n; i++) {
        for(int x : adj[i]) {
            if(dage[i] != dage[x] && done[dage[i]][dage[x]] == 0) {
                adj3[dage[i]].push_back(dage[x]);
                done[dage[i]][dage[x]] = 1;
            } 
        }
    }
    while(q--) {
        int a, b; cin >> a >> b;
        cout << (ans[a][b]? "DA\n":"NE\n");
    }
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 13580 KB Output is correct
2 Correct 58 ms 11852 KB Output is correct
3 Correct 55 ms 11212 KB Output is correct
4 Correct 70 ms 13548 KB Output is correct
5 Correct 64 ms 13616 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 1 ms 520 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 1 ms 532 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 532 KB Output is correct
9 Correct 1 ms 520 KB Output is correct
10 Correct 1 ms 516 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 1 ms 520 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 1 ms 532 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 532 KB Output is correct
9 Correct 1 ms 520 KB Output is correct
10 Correct 1 ms 516 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 504 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 1 ms 532 KB Output is correct
19 Correct 1 ms 596 KB Output is correct
20 Correct 1 ms 596 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 13580 KB Output is correct
2 Correct 58 ms 11852 KB Output is correct
3 Correct 55 ms 11212 KB Output is correct
4 Correct 70 ms 13548 KB Output is correct
5 Correct 64 ms 13616 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 520 KB Output is correct
8 Correct 1 ms 596 KB Output is correct
9 Correct 1 ms 596 KB Output is correct
10 Correct 1 ms 532 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 532 KB Output is correct
14 Correct 1 ms 520 KB Output is correct
15 Correct 1 ms 516 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 1 ms 596 KB Output is correct
19 Correct 1 ms 504 KB Output is correct
20 Correct 1 ms 596 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 596 KB Output is correct
23 Correct 1 ms 532 KB Output is correct
24 Correct 1 ms 596 KB Output is correct
25 Correct 1 ms 596 KB Output is correct
26 Correct 126 ms 26012 KB Output is correct
27 Correct 147 ms 26052 KB Output is correct
28 Correct 116 ms 22348 KB Output is correct
29 Correct 128 ms 25348 KB Output is correct
30 Correct 109 ms 22008 KB Output is correct
31 Correct 109 ms 22348 KB Output is correct
32 Correct 124 ms 25568 KB Output is correct
33 Correct 127 ms 25420 KB Output is correct
34 Correct 147 ms 25412 KB Output is correct
35 Correct 125 ms 25864 KB Output is correct