Submission #278396

#	Time	Username	Problem	Language	Result	Execution time	Memory
278396		ctziapo	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1091 ms	2936 KiB

shoes

#include "shoes.h"

long long count_swaps(std::vector<int> s) {

	int ans=0;

	/// n^2
	int v[s.size()]={};
	for(int i=0;i<s.size();i++){
            if(v[i]==1)
                continue;
            int cou=0;
            if(s[i]>0)
                cou=1;
            int f=-s[i];
        for(int j=i+1;j<s.size();j++){
            if(s[j]==f && v[j]!=1){
                v[j]=1;
                v[i]=1;
               //  cout<<cou<<" "<<i<<" "<<j<<endl;
                break;

            }
            if(v[j]==0){
                cou++;
            }
        }

        ans+=cou;
	}

	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:9:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |  for(int i=0;i<s.size();i++){
      |              ~^~~~~~~~~
shoes.cpp:16:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         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