Submission #717504

#	Time	Username	Problem	Language	Result	Execution time	Memory
717504		josanneo22	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	1081 ms	2636 KiB

shoes

#include "shoes.h"
#include<bits/stdc++.h>
#include <vector>
#include <deque>
#include <iostream>
using namespace std;
long long count_swaps(std::vector<int> s) {
	int n = s.size();
	bool sub4=true;
	for(int i=0;i<n;i++){
		if(s[i]>0) sub4=false;
	}
	for(int i=n;i<2*n;i++){
		if(s[i]<0) sub4=false;
	}
    if(n == 1){
        if(s[0] < 0) return 0;
        else return 1;
    }
    else if(sub4){
        long long swaps = 0;
        for(int i = 0; i < n; i++) swaps += i;
        return swaps;
    }
	else{
		long long count = 0; 
		deque<int> sc(s.size());
		for(int i = 0; i<s.size(); i++)sc[i] = s[i];
		while(!sc.empty())
		{
			int x = sc.front();
			sc.pop_front();
			int pos = 0;
			for(int i = 0; i<sc.size(); i++)
			{
				if(sc[i] == x*-1)
				{
					pos = i;
					break;
				}
			}
			count+=pos+1;
			if(x < 0)count--;
			sc.erase(sc.begin()+pos);
		}
		return count;
	}
	return 0;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:28:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |   for(int i = 0; i<s.size(); i++)sc[i] = s[i];
      |                  ~^~~~~~~~~
shoes.cpp:34:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |    for(int i = 0; i<sc.size(); i++)
      |                   ~^~~~~~~~~~

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