Submission #299656

#	Time	Username	Problem	Language	Result	Execution time	Memory
299656		suren	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1 ms	288 KiB

shoes

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define mk make_pair
#define pb push_back
#define F first
#define S second
 
int count_swaps( vector < int > vc ){
	int ans = 0, i;
	map < int , int > mp;
	
	
	for( i = 0; i < vc.size(); i ++ )
		mp[ vc[i] ] = 1;
	
	if( mp.size() == 2 ){
		vector < int > zn, brn;	
		for( i = vc.size()-1; i >= 0; i -- ){
			
			if( vc[i] < 0 )					
				zn.pb( i );
			else
				brn.pb( i );
			
		}
		
		while( zn.size() > 0 && brn.size() > 0 ){
			
			if( zn[zn.size()-1] < brn[brn.size()-1] ){
				ans += brn[brn.size()-1] - zn[zn.size()-1] - 1;
			}
			else{
				ans += zn[zn.size()-1] - brn[brn.size()-1];
			}
			zn.pop_back();
			brn.pop_back();
			
		}
		return ans;
	}
	
	while( vc.size() > 0 ){
		for( i = 1; i < vc.size(); i ++ ){
			if( vc[i] == vc[0] * -1 ){
				if( vc[i] < 0 ){
					ans += i;
					vc.erase( vc.begin() + i );
					vc.erase( vc.begin() + 0 );
					break;
				}
				else{
					ans += i-1;
					vc.erase( vc.begin() + i );
					vc.erase( vc.begin() + 0 );
					break;
				}
			}
		}
	}
	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'int count_swaps(std::vector<int>)':
shoes.cpp:14:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |  for( i = 0; i < vc.size(); i ++ )
      |              ~~^~~~~~~~~~~
shoes.cpp:44:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |   for( i = 1; i < vc.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