Submission #578681

#	Time	Username	Problem	Language	Result	Execution time	Memory
578681		MrDeboo	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	1095 ms	11200 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
long long count_swaps(vector<int> s){
	long long ans=0;
	for(int i=0;i<s.size();i+=2){
		map<int,int>mp;
		for(int w=i;w<s.size();w++){
			if(!mp.count(s[w]))mp[s[w]]=w;
		}
		int b=abs(s[i]);
		for(int w=i;w<s.size();w++){
			if(s[w]==b*-1){
				for(int j=w-1;j>=i;j--){
					swap(s[j],s[j+1]);
					ans++;
				}
				break;
			}
		}
		for(int w=i;w<s.size();w++){
			if(s[w]==b){
				for(int j=w-1;j>=i+1;j--){
					swap(s[j],s[j+1]);
					ans++;
				}
				break;
			}
		}
	}
	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:6:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 |  for(int i=0;i<s.size();i+=2){
      |              ~^~~~~~~~~
shoes.cpp:8:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |   for(int w=i;w<s.size();w++){
      |               ~^~~~~~~~~
shoes.cpp:12:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |   for(int w=i;w<s.size();w++){
      |               ~^~~~~~~~~
shoes.cpp:21:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |   for(int w=i;w<s.size();w++){
      |               ~^~~~~~~~~

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