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답안 #463679

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
463679 2021-08-11T13:33:53 Z tomsyd 통행료 (IOI18_highway) C++17
5 / 100
 235 ms 262148 KB 
#include "highway.h"
#include <bits/stdc++.h>
using namespace std;

vector<vector<int>> adj;
vector<pair<int,int>> edges;

void dfs(int node, int prev){
	for (int i:adj[node]){
		if (i != prev){
			dfs(i,node);
			edges.emplace_back(node,i);
		}
	}
}

void find_pair(int N, vector<int> U, vector<int> V, int A, int B) {
	int M = U.size();
	edges.clear();
	adj = vector<vector<int>>(N);
	map<pair<int,int>,int> id;
	for (int i=0; i<M; ++i){
		adj[U[i]].emplace_back(V[i]);
		adj[V[i]].emplace_back(U[i]);
		id[make_pair(U[i],V[i])] = i;
		id[make_pair(V[i],U[i])] = i;
	}
	dfs(0,-1);
	vector<int> query;
	for (int i=0; i<M; ++i) query.emplace_back(1);
	int init = ask(query), crt = 0;
	for (int j=0; j<edges.size(); ++j){
		query[id[edges[j]]] = 0;
		if (ask(query) != init){
			crt = edges[j].second;
			break;
		}
		query[id[edges[j]]] = 1;
	}
	answer(crt,0);
}

Compilation message

highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:32:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |  for (int j=0; j<edges.size(); ++j){
      |                ~^~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 200 KB Output is correct
2 Correct 1 ms 200 KB Output is correct
3 Correct 1 ms 200 KB Output is correct
4 Correct 1 ms 200 KB Output is correct
5 Correct 2 ms 200 KB Output is correct
6 Correct 2 ms 200 KB Output is correct
7 Correct 1 ms 200 KB Output is correct
8 Correct 2 ms 200 KB Output is correct
9 Correct 1 ms 200 KB Output is correct
10 Correct 1 ms 200 KB Output is correct
11 Correct 2 ms 200 KB Output is correct
12 Correct 1 ms 200 KB Output is correct

Subtask #2
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 3 ms 456 KB Execution killed with signal 13
2 Halted 0 ms 0 KB -

Subtask #3
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 24 ms 3436 KB Execution killed with signal 13
2 Halted 0 ms 0 KB -

Subtask #4
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 3 ms 456 KB Execution killed with signal 13
2 Halted 0 ms 0 KB -

Subtask #5
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 235 ms 262148 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #6
0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 222 ms 262148 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -