Submission #401172

#	Time	Username	Problem	Language	Result	Execution time	Memory
401172		victoriad	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1091 ms	3116 KiB

shoes

#include "shoes.h"

long long count_swaps(std::vector<int> s) {
	long long int x=0;
	for(int i=0;i<s.size();i+=2){
		if(s[i+1]!=-1*s[i]){
			int a=s[i+1];
			for(int j=i+1;j<s.size();j++){
				if(s[j]!=-1*s[i]){
					int b=s[j];
          			s[j]=a;
         			 a=b;
				}
				else{
					s[i+1]=s[j];
          			s[j]=a;
					x+=j-i-1;
          
					break;
				}
			}
		}
		if(s[i+1]<s[i])x++;
	}
	return x;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:5:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 |  for(int i=0;i<s.size();i+=2){
      |              ~^~~~~~~~~
shoes.cpp:8:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |    for(int j=i+1;j<s.size();j++){
      |                  ~^~~~~~~~~

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