oj.uz

Submission #941115

# Submission time Handle Problem Language Result Execution time Memory
941115 2024-03-08T07:23:26 Z Ghulam_Junaid Senior Postmen (BOI14_postmen) C++17
55 / 100
 500 ms 125628 KB 
#include <bits/stdc++.h>
using namespace std;
 
const int N = 5e5 + 10;
int n, m, ind[N];
set<int> g[N];
bool vis[N];
 
vector<int> path;
int dfs(int v, int prev = -1){
    // cout << "dfs on " << v << endl;
    vis[v] = 1;
    ind[v] = path.size();
    path.push_back(v);
 
    while (!g[v].empty()){
        int u = *g[v].begin();
        g[v].erase(u);
        g[u].erase(v);
        if (prev == u) continue;
        if (!vis[u]){
            int found = dfs(u, v);
            // cout << "I am " << v << " cycle found is at " << found << " neighbour was " << u << endl; 
            if (found != v){
                path.pop_back();
                vis[v] = 0;
                return found;
            }
        }
        else{
            for (int i = ind[u]; i < path.size(); i ++)
                printf("%d ", path[i]);
            printf("\n");
 
            // cout << "at v = " << v << " I found a cycle starting from " << u << endl; 
 
            path.pop_back();
            vis[v] = 0;
            return u;
        }
    }
    path.pop_back();
    return prev;
}
 
int main(){
    scanf("%d%d", &n, &m);
    for (int i = 0; i < m; i ++){
        int u, v;
        scanf("%d%d", &u, &v);
 
        g[u].insert(v);
        g[v].insert(u);
    }
 
    for (int i = 1; i <= n; i ++)
        if (!g[i].empty())
            dfs(i);
}

Compilation message

postmen.cpp: In function 'int dfs(int, int)':
postmen.cpp:31:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |             for (int i = ind[u]; i < path.size(); i ++)
      |                                  ~~^~~~~~~~~~~~~
postmen.cpp: In function 'int main()':
postmen.cpp:47:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
postmen.cpp:50:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |         scanf("%d%d", &u, &v);
      |         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
38.0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 24920 KB Output is correct
2 Correct 5 ms 24924 KB Output is correct
3 Correct 5 ms 24920 KB Output is correct
4 Correct 6 ms 25180 KB Output is correct
5 Correct 6 ms 24924 KB Output is correct
6 Correct 7 ms 25436 KB Output is correct
7 Correct 14 ms 26460 KB Output is correct
8 Correct 8 ms 25436 KB Output is correct
9 Correct 116 ms 34720 KB Output is correct
10 Correct 6 ms 25180 KB Output is correct
11 Correct 7 ms 25180 KB Output is correct
12 Correct 76 ms 34900 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 24920 KB Output is correct
2 Correct 5 ms 24924 KB Output is correct
3 Correct 5 ms 24924 KB Output is correct
4 Correct 7 ms 25180 KB Output is correct
5 Correct 6 ms 24924 KB Output is correct
6 Correct 8 ms 25436 KB Output is correct
7 Correct 17 ms 26456 KB Output is correct
8 Correct 6 ms 25436 KB Output is correct
9 Correct 79 ms 34672 KB Output is correct
10 Correct 6 ms 25180 KB Output is correct
11 Correct 7 ms 25176 KB Output is correct
12 Correct 79 ms 34708 KB Output is correct
13 Correct 64 ms 45004 KB Output is correct
14 Correct 61 ms 40144 KB Output is correct
15 Correct 61 ms 34904 KB Output is correct
16 Correct 64 ms 45224 KB Output is correct
17 Correct 63 ms 34896 KB Output is correct
18 Correct 62 ms 37668 KB Output is correct

Subtask #3
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 24924 KB Output is correct
2 Correct 6 ms 25064 KB Output is correct
3 Correct 5 ms 24920 KB Output is correct
4 Correct 8 ms 25180 KB Output is correct
5 Correct 6 ms 24924 KB Output is correct
6 Correct 9 ms 25432 KB Output is correct
7 Correct 18 ms 26460 KB Output is correct
8 Correct 6 ms 25432 KB Output is correct
9 Correct 79 ms 34640 KB Output is correct
10 Correct 6 ms 25176 KB Output is correct
11 Correct 7 ms 25180 KB Output is correct
12 Correct 76 ms 34900 KB Output is correct
13 Correct 68 ms 44888 KB Output is correct
14 Correct 58 ms 40144 KB Output is correct
15 Correct 60 ms 34896 KB Output is correct
16 Correct 67 ms 45016 KB Output is correct
17 Correct 63 ms 34900 KB Output is correct
18 Correct 61 ms 37540 KB Output is correct
19 Correct 473 ms 125628 KB Output is correct
20 Correct 479 ms 100744 KB Output is correct
21 Execution timed out 601 ms 80252 KB Time limit exceeded
22 Halted 0 ms 0 KB -