Submission #289887

#	Time	Username	Problem	Language	Result	Execution time	Memory
289887		evpipis	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1 ms	384 KiB

shoes

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

typedef long long ll;
const int len = 2e5+5;
int vis[len];

ll count_swaps(vector<int> shoe) {
    ll ans = 0;
    for (int i = 0; i < shoe.size(); i++){
        if (vis[i]) continue;

        int j = i+1, cnt = 0;
        while (shoe[j] != -shoe[i])
            cnt += (!vis[j]), j++;

        ans += cnt + (shoe[i] > 0);
        vis[i] = vis[j] = 1;
    }

	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'll count_swaps(std::vector<int>)':
shoes.cpp:11:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for (int i = 0; i < shoe.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