oj.uz

Submission #42217

# Submission time Handle Problem Language Result Execution time Memory
42217 2018-02-23T17:50:10 Z gabrielsimoes Senior Postmen (BOI14_postmen) C++14
55 / 100
 500 ms 80716 KB 
#include <bits/stdc++.h>
using namespace std;

const int MAXN = 500010;
vector<pair<int, int>> g[MAXN];
int ix[MAXN];
bool used[MAXN];

vector<int> v;
int dfs(int cur) {
  while (ix[cur] < g[cur].size()) {
    if (!used[g[cur][ix[cur]].second]) {
      used[g[cur][ix[cur]].second] = true;
      dfs(g[cur][ix[cur]].first);
      v.push_back(cur);
    }
    ix[cur]++;
  }
}

void print(vector<int>& v, int pos) {
  while (pos < v.size()) printf("%d ", v[pos++]);
  printf("\n");
}

vector<int> in[MAXN];

int main() {
  int n, m;
  scanf("%d %d", &n, &m);

  for (int i = 0, a, b; i < m; i++) {
    scanf("%d %d", &a, &b);
    g[a].push_back({b, i});
    g[b].push_back({a, i});
  }

  dfs(1);
  reverse(v.begin(), v.end());

  vector<int> stk;
  for (int x : v) {
    if (!in[x].empty()) {
      int pos = in[x].back();
      print(stk, pos);
      for (int i = pos; i < stk.size(); i++) in[stk[i]].pop_back();
      stk.resize(pos);
    }

    in[x].push_back(stk.size());
    stk.push_back(x);
  }

  print(stk, 0);
}

Compilation message

postmen.cpp: In function 'int dfs(int)':
postmen.cpp:11:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while (ix[cur] < g[cur].size()) {
          ~~~~~~~~^~~~~~~~~~~~~~~
postmen.cpp:19:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
postmen.cpp: In function 'void print(std::vector<int>&, int)':
postmen.cpp:22:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while (pos < v.size()) printf("%d ", v[pos++]);
          ~~~~^~~~~~~~~~
postmen.cpp: In function 'int main()':
postmen.cpp:46:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for (int i = pos; i < stk.size(); i++) in[stk[i]].pop_back();
                         ~~^~~~~~~~~~~~
postmen.cpp:30:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &n, &m);
   ~~~~~^~~~~~~~~~~~~~~~~
postmen.cpp:33:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &a, &b);
     ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
38.0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 23784 KB Output is correct
2 Correct 21 ms 23808 KB Output is correct
3 Correct 20 ms 23808 KB Output is correct
4 Correct 21 ms 24064 KB Output is correct
5 Correct 27 ms 23936 KB Output is correct
6 Correct 20 ms 24064 KB Output is correct
7 Correct 25 ms 24960 KB Output is correct
8 Correct 22 ms 24064 KB Output is correct
9 Correct 60 ms 29820 KB Output is correct
10 Correct 21 ms 24064 KB Output is correct
11 Correct 20 ms 24064 KB Output is correct
12 Correct 67 ms 30324 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 23784 KB Output is correct
2 Correct 17 ms 23808 KB Output is correct
3 Correct 18 ms 23808 KB Output is correct
4 Correct 19 ms 24064 KB Output is correct
5 Correct 18 ms 23936 KB Output is correct
6 Correct 24 ms 24096 KB Output is correct
7 Correct 25 ms 24960 KB Output is correct
8 Correct 20 ms 24060 KB Output is correct
9 Correct 60 ms 29924 KB Output is correct
10 Correct 25 ms 24112 KB Output is correct
11 Correct 18 ms 24064 KB Output is correct
12 Correct 70 ms 30196 KB Output is correct
13 Correct 95 ms 35060 KB Output is correct
14 Correct 100 ms 32116 KB Output is correct
15 Correct 121 ms 32924 KB Output is correct
16 Correct 107 ms 35060 KB Output is correct
17 Correct 147 ms 30452 KB Output is correct
18 Correct 108 ms 32732 KB Output is correct

Subtask #3
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 23808 KB Output is correct
2 Correct 19 ms 23784 KB Output is correct
3 Correct 19 ms 23808 KB Output is correct
4 Correct 23 ms 24064 KB Output is correct
5 Correct 19 ms 23936 KB Output is correct
6 Correct 23 ms 24064 KB Output is correct
7 Correct 28 ms 24960 KB Output is correct
8 Correct 20 ms 23988 KB Output is correct
9 Correct 67 ms 29924 KB Output is correct
10 Correct 20 ms 24064 KB Output is correct
11 Correct 21 ms 24064 KB Output is correct
12 Correct 67 ms 30300 KB Output is correct
13 Correct 117 ms 35108 KB Output is correct
14 Correct 122 ms 32116 KB Output is correct
15 Correct 117 ms 32852 KB Output is correct
16 Correct 119 ms 35036 KB Output is correct
17 Correct 127 ms 30452 KB Output is correct
18 Correct 104 ms 32732 KB Output is correct
19 Execution timed out 567 ms 80716 KB Time limit exceeded
20 Halted 0 ms 0 KB -