Submission #573051

#	Time	Username	Problem	Language	Result	Execution time	Memory
573051		sff_user	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	1063 ms	2112 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
 
#define vi vector<int>
#define ll long long
 
using namespace std;
 
 
ll count_swaps(vector<int> s) {
	int n = s.size()/2;
	ll ans = 0;
	for(int i = 0 ;i < s.size() ; i++){
		for(int j = i+1;j < s.size() ; j++){
			if(s[j]+s[i] == 0){
				if(s[i]>0){
					ans+= j-i;
				}else {
					ans+=j-i-1;
				}
				s.erase(s.begin()+j);
				break;
			}
		}
	}
	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:13:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |  for(int i = 0 ;i < s.size() ; i++){
      |                 ~~^~~~~~~~~~
shoes.cpp:14:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |   for(int j = i+1;j < s.size() ; j++){
      |                   ~~^~~~~~~~~~
shoes.cpp:11:6: warning: unused variable 'n' [-Wunused-variable]
   11 |  int n = s.size()/2;
      |      ^

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