oj.uz

Submission #543928

# Submission time Handle Problem Language Result Execution time Memory
543928 2022-03-31T15:43:56 Z Olympia Senior Postmen (BOI14_postmen) C++17
38 / 100
 500 ms 16768 KB 
#include <vector>
#include <algorithm>
#include <iostream>
#include <set>
#include <cmath>
#include <map>
#include <random>
#include <cassert>
#include <ctime>
#include <stack>
#include <cstdlib>
#include <queue>
#include <cstdio>
#include <limits.h>

using namespace std;

vector<pair<int,int>> adj[(int)5e5];
bool hasVisited[(int)5e5];
bool okay[(int)5e5];

int main() {
    //freopen("balancing.in", "r", stdin);
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int N, M;
    scanf("%d%d", &N, &M);
    for (int i = 0; i < M; i++) {
        int u, v;
        scanf("%d%d", &u, &v);
        u--, v--;
        adj[u].emplace_back(v, i), adj[v].emplace_back(u, i);
    }
    for (int i = 0; i < M; i++) {
        okay[i] = true;
    }
    stack<pair<int,int>> nodes;
    for (int i = 0; i < N; i++) {
        nodes.push({i, -1});
        while (!nodes.empty()) {
            int cur = nodes.top().first;
            okay[nodes.top().second] = false;
            hasVisited[cur] = true;
            bool upd = false;
            for (pair<int,int> &pr: adj[cur]) {
                int j = pr.first;
                if (pr.second == nodes.top().second || !okay[pr.second]) {
                    continue;
                }
                okay[pr.second] = false;
                if (hasVisited[j]) {
                    while (!nodes.empty() && nodes.top().first != j) {
                        hasVisited[nodes.top().first] = false;
                        printf("%d ", nodes.top().first + 1);
                        nodes.pop();
                    }
                    printf("%d\n", j + 1);
                } else {
                    nodes.emplace(j, pr.second);
                }
                upd = true;
                break;
            }
            if (!upd) {
                nodes.pop();
            }
        }
    }
}

Compilation message

postmen.cpp: In function 'int main()':
postmen.cpp:27:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     scanf("%d%d", &N, &M);
      |     ~~~~~^~~~~~~~~~~~~~~~
postmen.cpp:30:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |         scanf("%d%d", &u, &v);
      |         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
38.0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 6 ms 11988 KB Output is correct
4 Correct 8 ms 12116 KB Output is correct
5 Correct 6 ms 11988 KB Output is correct
6 Correct 8 ms 12116 KB Output is correct
7 Correct 12 ms 12552 KB Output is correct
8 Correct 7 ms 12116 KB Output is correct
9 Correct 64 ms 14540 KB Output is correct
10 Correct 7 ms 12116 KB Output is correct
11 Correct 8 ms 12060 KB Output is correct
12 Correct 42 ms 14796 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 8 ms 12084 KB Output is correct
4 Correct 9 ms 12116 KB Output is correct
5 Correct 7 ms 12116 KB Output is correct
6 Correct 8 ms 12116 KB Output is correct
7 Correct 11 ms 12500 KB Output is correct
8 Correct 7 ms 12172 KB Output is correct
9 Correct 57 ms 14596 KB Output is correct
10 Correct 8 ms 12116 KB Output is correct
11 Correct 8 ms 12116 KB Output is correct
12 Correct 48 ms 14908 KB Output is correct
13 Correct 72 ms 16748 KB Output is correct
14 Correct 53 ms 15640 KB Output is correct
15 Execution timed out 804 ms 15292 KB Time limit exceeded
16 Halted 0 ms 0 KB -

Subtask #3
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 8 ms 11988 KB Output is correct
4 Correct 7 ms 12116 KB Output is correct
5 Correct 7 ms 12116 KB Output is correct
6 Correct 8 ms 12116 KB Output is correct
7 Correct 12 ms 12628 KB Output is correct
8 Correct 7 ms 12116 KB Output is correct
9 Correct 59 ms 14500 KB Output is correct
10 Correct 8 ms 12116 KB Output is correct
11 Correct 7 ms 12088 KB Output is correct
12 Correct 43 ms 14736 KB Output is correct
13 Correct 59 ms 16768 KB Output is correct
14 Correct 54 ms 15636 KB Output is correct
15 Execution timed out 834 ms 15276 KB Time limit exceeded
16 Halted 0 ms 0 KB -