Submission #288667

#	Time	Username	Problem	Language	Result	Execution time	Memory
288667		aryan12	Arranging Shoes (IOI19_shoes)	C++17	10 / 100	33 ms	3200 KiB

shoes

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

int count_swaps(vector<int> a) {
    int left = 0, right = 1;
    int ans = 0;
    for(int i = 0; i < a.size(); i++) {
        if(a[i] < 0) {
            if(left < i) {
                ans += (i - left);
            }
            left += 2;
        }
        else {
            if(right < i) {
                ans += (i - right);
            }
            right += 2;
        }
    }
    return ans;
}
/*
int main() {
    int n;
    cin >> n;
    vector<int> a(n * 2);
    for(int i = 0; i < n * 2; i++) {
        cin >> a[i];
    }
    cout << count_swaps(a) << endl;
}*/

Compilation message (stderr)

shoes.cpp: In function 'int count_swaps(std::vector<int>)':
shoes.cpp:7:22: 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 < a.size(); i++) {
      |                    ~~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 15