Submission #282456

#	Time	Username	Problem	Language	Result	Execution time	Memory
282456		Ruba_K	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1094 ms	3200 KiB

shoes

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

long long count_swaps(vector<int> v) {
    int n = v.size() ;

    long long  ans = 0 ;
    for(;!v.empty();){
        int i = v.size() - 1;
        int idx = i - 1 ;
        while(v[idx] != v[i] * -1){
            idx -- ;
            ans ++ ;
        }
        v.erase(v.begin() + idx);
        if(v[i] < 0)ans ++ ;
        v.pop_back();

    }
	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:6:9: warning: unused variable 'n' [-Wunused-variable]
    6 |     int n = v.size() ;
      |         ^

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