Submission #1033559

#	Time	Username	Problem	Language	Result	Execution time	Memory
1033559		vjudge1	Toy Train (IOI17_train)	C++17	5 / 100	7 ms	1008 KiB

train

#include "train.h"
using namespace std;
int nxt[100100],slf[100100];
std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {
    int n=a.size();
    vector<int>ans(n);
    for(int i=0;i<u.size();i++){
        int a=u[i],b=v[i];
        if(a==b)slf[a]=1;
        else nxt[a]=1;
    }
    for(int i=n;i--;){
        if(!nxt[i]){
            ans[i]=r[i];
        } else if(!slf[i]){
            ans[i]=ans[i+1];
        } else {
            if(r[i]^a[i])
                ans[i]=ans[i+1];
            else ans[i]=r[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:7:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |     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