Submission #1045560

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1045560	2024-08-06T05:42:58 Z	pcc	Toy Train (IOI17_train)	C++17	0 / 100	507 ms	4516 KB

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];

void BFS(int s = -1){
	if(s != -1){
		dist.reset();
		q.push(s);
	}
	while(!q.empty()){
		auto now = q.front();
		q.pop();
		for(auto nxt:paths[now]){
			if(!dist[nxt]){
				dist[nxt] = 1;
				q.push(nxt);
			}
		}
	}
	return;
}

std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {
	N = a.size();
	assert(r.size() == a.size());
	for(int i = 0;i<N;i++){
		owner[i] = a[i];
		if(r[i])charge.push_back(i);
	}
	for(int i = 0;i<u.size();i++){
		int aa = u[i],bb = v[i];
		paths[aa].push_back(bb);
	}
	for(int i = 0;i<N;i++){
		BFS(i);
		reach[i] = dist;
	}
	vector<int> ans(N);
	for(int i = 0;i<N;i++){
		for(auto &j:charge){
			if(reach[i][j]&&reach[j][i])ans[i] = 1;
		}
	}
	return ans;
}

Compilation message

train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:39:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |  for(int i = 0;i<u.size();i++){
      |                ~^~~~~~~~~

Subtask #1
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	90 ms	3924 KB	3rd lines differ - on the 14th token, expected: '1', found: '0'
2	Halted	0 ms	0 KB	-

Subtask #2
0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	1 ms	344 KB	3rd lines differ - on the 8th token, expected: '0', found: '1'
2	Halted	0 ms	0 KB	-

Subtask #3
0 / 11.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	78 ms	4432 KB	Output is correct
2	Correct	84 ms	4432 KB	Output is correct
3	Correct	95 ms	4516 KB	Output is correct
4	Incorrect	507 ms	4436 KB	3rd lines differ - on the 13th token, expected: '1', found: '0'
5	Halted	0 ms	0 KB	-