#include<bits/stdc++.h> using namespace std; #include "shoes.h" long long count_swaps(std::vector<int> s) { long long n = s.size()/2; int swaps=0; int cont=0; int maxal=0; for(int i=0;i<s.size();i++){ if(s[i]<0 && maxal>=0) cont++, maxal--; else{ if(s[i]>0) maxal++; if(maxal>0) swaps += 1 + cont*(cont-1)/2; cont = 0; } //cout<<s[i]<<" "<<cont<<" "<<maxal<<endl; } swaps += cont*(cont-1)/2; return swaps; int ind = 0; while(ind<s.size()){ if(s[ind]>0) swaps++; for(int i=ind;i<s.size();i++){ if(s[i]==-s[ind]){ swaps += (i-ind-1); s.erase(s.begin()+i); s.insert(s.begin()+ind+1, -s[ind]); ind+=2; break; } } } return swaps; }

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:10:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<s.size();i++){
              ~^~~~~~~~~
shoes.cpp:23:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while(ind<s.size()){
        ~~~^~~~~~~~~
shoes.cpp:25:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=ind;i<s.size();i++){
                 ~^~~~~~~~~
shoes.cpp:6:12: warning: unused variable 'n' [-Wunused-variable]
  long long n = s.size()/2;
            ^