제출 #112294

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
112294		gs14004	장난감 기차 (IOI17_train)	C++17	0 / 100	9 ms	1408 KiB

train

#include "train.h"
#include <bits/stdc++.h>
using namespace std;

vector<int> who_wins(vector<int> a, vector<int> r, vector<int> u, vector<int> v){
	vector<int> gph[5005];
	int n = a.size();
	int m = u.size();
	vector<int> ret(n);
	vector<int> proc(n);
	for(int i=0; i<m; i++){
		gph[v[i]].push_back(u[i]);
	}
	while(true){
		int unproc = count(proc.begin(), proc.end(), 0);
		if(unproc == 0) break;
		vector<int> deg(n);
		queue<int> que;
		for(int i=0; i<m; i++){
			if(!proc[u[i]] && !proc[v[i]]){
				deg[u[i]]++;
			}
		}
		for(int i=0; i<n; i++){
			if(!proc[i] && r[i]){
				deg[i] = 0;
				que.push(i);
			}
		}
		vector<int> aReach;
		while(!que.empty()){
			int x = que.front(); que.pop();
			aReach.push_back(x);
			for(auto &j : gph[x]){
				if(proc[j]) continue;
				if(a[j] == 1 && deg[j] > 0){
					deg[j] = 0;
					que.push(j);
				}
				if(a[j] == 0){
					deg[j]--;
					if(deg[j] == 0) que.push(j);
				}
			}
		}
		if(aReach.size() == unproc){
			for(auto &i : aReach) proc[i] = 1, ret[i] = 1;
		}
		else{
			for(int i=0; i<n; i++){
				if(!proc[i]) proc[i] = 1, ret[i] = 0;
			}
			for(auto &i : aReach) proc[i] = 0;
		}
	}
	return ret;
}

컴파일 시 표준 에러 (stderr) 메시지

train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:46:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(aReach.size() == unproc){
      ~~~~~~~~~~~~~~^~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
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• Subtask 6: 0 / 51