Submission #783447

#	Time	Username	Problem	Language	Result	Execution time	Memory
783447		boyliguanhan	Toy Train (IOI17_train)	C++17	5 / 100	4 ms	856 KiB

train

#include "train.h"
#include<bits/stdc++.h>
using namespace std;
std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {
	std::vector<int> res(a.size(),0);
    res.back() = r.back();
    int x[r.size()];
    memset(x, 0, sizeof x);
    for(int i = 0; i < u.size(); i++) {
        x[u[i]]+=1<<v[i]-u[i];
    }
    for(int i = a.size()-1; i--;) {
        if(a[i]) {
            if(x[i]%2&&r[i]) res[i] = 1;
            else if(x[i]>1&&res[i+1]) res[i] = 1;
        } else {
            if(x[i]%2&&!r[i]) res[i] = 0;
            else if(x[i]>1&&!res[i+1])res[i] = 0;
            else res[i] = 1;
        }
    }
	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:9:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for(int i = 0; i < u.size(); i++) {
      |                    ~~^~~~~~~~~~
train.cpp:10:25: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   10 |         x[u[i]]+=1<<v[i]-u[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