Submission #1045835

#	Time	Username	Problem	Language	Result	Execution time	Memory
1045835		pcc	Toy Train (IOI17_train)	C++17	0 / 100	5 ms	1116 KiB

train

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

const int mxn = 5050;

vector<int> charge;
int N,M;
queue<int> q;
int owner[mxn];
bitset<mxn> reach[mxn],dist;
vector<int> paths[mxn];
bitset<mxn> ban;
bitset<mxn> cyc;
bitset<mxn> state;

std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {
	N = a.size();
	for(int i = 0;i<N;i++){
		owner[i] = a[i];
		if(r[i]){
			charge.push_back(i);
			ban[i] = true;
		}
	}
	for(int i = 0;i<u.size();i++){
		int aa = u[i],bb = v[i];
		paths[aa].push_back(bb);
	}
	vector<int> ans(N,-1);
	for(int i = N-1;i>=0;i--){
		if(!owner[i]){
			ans[i] = 0;
			for(auto nxt:paths[i]){
				if(state[nxt]){
					ans[i] = 1;
				}
				else if(nxt == i&&ban[i])ans[i] = 1;
			}
		}
		else{
			ans[i] = 1;
			for(auto nxt:paths[i]){
				if(!state[nxt]){
					ans[i] = 0;
				}
				else if(nxt == i&&!ban[i])ans[i] = 0;
			}
		}
		state[i] = ans[i];
	}
	return ans;
}

Compilation message (stderr)

train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:26:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |  for(int i = 0;i<u.size();i++){
      |                ~^~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 11
• Subtask 4: 0 / 11
• Subtask 5: 0 / 12
• Subtask 6: 0 / 51