Submission #1030680

#	Time	Username	Problem	Language	Result	Execution time	Memory
1030680		Zicrus	Arranging Shoes (IOI19_shoes)	C++17	Compilation error	0 ms	0 KiB

shoes

#include "shoes.h"
using namespace std;

typedef long long ll;

ll count_swaps(vector<int> a) {
    ll n = a.size() / 2;
    vector<ll> leftPos;
    ll res = 0;
    for (int i = 0; i < a.size(); i++) {
        if (a[i] < 0) leftPos.push_back(i);
    }
    for (int i = 0; i < n; i++) {
        res += abs(leftPos[i] - 2*i);
    }
    return res;
}

Compilation message (stderr)

shoes.cpp: In function 'll count_swaps(std::vector<int>)':
shoes.cpp:10:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for (int i = 0; i < a.size(); i++) {
      |                     ~~^~~~~~~~~~
shoes.cpp:14:16: error: 'abs' was not declared in this scope
   14 |         res += abs(leftPos[i] - 2*i);
      |                ^~~