Submission #401181

#	Time	Username	Problem	Language	Result	Execution time	Memory
401181		victoriad	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1 ms	204 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]){
            for(int j=i+1;j<s.size();j++){
                if(s[j]==-1*s[i]){
                    s[j]*=-1;
                      x+=j-i-1;
                }
            }
        }
        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:5:18: 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:7:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |             for(int j=i+1;j<s.size();j++){
      |                           ~^~~~~~~~~

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