oj.uz

Submission #330145

# Submission time Handle Problem Language Result Execution time Memory
330145 2020-11-24T03:48:04 Z enerelt14 Dreaming (IOI13_dreaming) C++14
0 / 100
 53 ms 13420 KB 
#include "dreaming.h"
#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair

using namespace std;
vector<pair<int, int> > adj[100005];
int go[100005]; 
int cost[1000005] = {0}; 
int vis[1000005] = {0};
int n;
int id = 0, max_path = 0;
vector<int> median;
void dfs(int u, int x, int path){
  if(max_path <= path) {
    id = u;
    max_path = path;
  }
  vis[u] = 1;
  for(int i = 0; i < adj[u].size(); i++){
    int v, e;
    v = adj[u][i].first;
    e = adj[u][i].second;
    if(v != x) {
        dfs(v, u, path + e);
    }
  }
}
void dfss(int u, int x){
  if(max_path <= cost[u]) {
    id = u;
    max_path = cost[u];
  }
  vis[u] = 1;
  go[u] = x;
  for(int i = 0; i < adj[u].size(); i++){
    int v, e;
    v = adj[u][i].first;
    e = adj[u][i].second;
    if(v != x) {
        cost[v] = cost[u] + e;
        dfss(v, u);
    }
  }
}
int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
	n = N;
	memset(go, -1, sizeof(go));
  	for(int i = 0; i < M; i++){
      adj[A[i]].pb(mp(B[i], T[i]));
      adj[B[i]].pb(mp(A[i], T[i]));
  	}
  	for(int i = 0; i < n; i++)
    	if(vis[i] == 0){
      	id = 0;
      	max_path = 0;
      	dfs(i, -1, 0);
      	max_path = 0;
      	dfss(id, -1);
      	int diameter = max_path;
      	int u = id;
      	int path = 1e9;
      	while(u != -1){   
      	    path = min(path, max(diameter - cost[u], cost[u]));
          	u = go[u];
      	}
      	median.pb(path);
    	}
    	sort(median.begin(), median.end());
    	int sz = median.size();
    	int res = 0;
    	res = max(res, median[sz - 1] + median[sz - 2] + L);
    	if(sz > 2) res = max(res, median[sz - 2] + median[sz - 3] + 2 * L);
    	return res;
}

Compilation message

dreaming.cpp: In function 'void dfs(int, int, int)':
dreaming.cpp:20:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |   for(int i = 0; i < adj[u].size(); i++){
      |                  ~~^~~~~~~~~~~~~~~
dreaming.cpp: In function 'void dfss(int, int)':
dreaming.cpp:36:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |   for(int i = 0; i < adj[u].size(); i++){
      |                  ~~^~~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 53 ms 13420 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 53 ms 13420 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 53 ms 13420 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 6512 KB Output is correct
2 Correct 27 ms 6508 KB Output is correct
3 Correct 26 ms 6512 KB Output is correct
4 Correct 28 ms 6636 KB Output is correct
5 Correct 26 ms 6508 KB Output is correct
6 Correct 27 ms 7024 KB Output is correct
7 Correct 27 ms 6640 KB Output is correct
8 Correct 26 ms 6384 KB Output is correct
9 Correct 25 ms 6376 KB Output is correct
10 Correct 27 ms 6632 KB Output is correct
11 Correct 2 ms 3052 KB Output is correct
12 Correct 7 ms 4328 KB Output is correct
13 Correct 7 ms 4456 KB Output is correct
14 Correct 7 ms 4328 KB Output is correct
15 Correct 7 ms 4328 KB Output is correct
16 Correct 7 ms 4328 KB Output is correct
17 Correct 6 ms 4200 KB Output is correct
18 Correct 7 ms 4456 KB Output is correct
19 Correct 7 ms 4328 KB Output is correct
20 Incorrect 2 ms 3052 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 53 ms 13420 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 53 ms 13420 KB Output isn't correct
2 Halted 0 ms 0 KB -