Submission #1037572

#	Time	Username	Problem	Language	Result	Execution time	Memory
1037572		12345678	Toy Train (IOI17_train)	C++17	5 / 100	4 ms	860 KiB

train

#include "train.h"
#include <bits/stdc++.h>

using namespace std;

const int nx=5e3+5;

int n, dp[nx], m[2][nx];

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<u.size(); i++)
    {
        if (u[i]==v[i]) m[0][u[i]]=1;
        else m[1][u[i]]=1;
    }
    for (int i=n-1; i>=0; i--)
    {
        if (a[i])
        {
            if (m[0][i]&&r[i]) dp[i]=1;
            else if (m[1][i]) dp[i]=dp[i+1];
            else dp[i]=0;
        }
        else
        {
            if (m[0][i]&&!r[i]) dp[i]=0;
            else if (m[1][i]) dp[i]=dp[i+1];
            else dp[i]=1;
        }
    }
	std::vector<int> res(n);
	for(int i = 0; i < (int)res.size(); i++) res[i]=dp[i];
	return res;
}

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:12:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for (int i=0; i<u.size(); i++)
      |                   ~^~~~~~~~~

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