Submission #915974

#	Time	Username	Problem	Language	Result	Execution time	Memory
915974		Aiperiii	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1068 ms	432 KiB

shoes

#include <bits/stdc++.h>
#include "shoes.h"
using namespace std;
long long count_swaps(vector<int> s) {
    long long x=abs(s[0]);
    set <long long > v;
    for(int i=0;i<s.size();i++){
       if(s[i]==-x && i%2==1)v.insert(i);
    }
    long long ans=0;
    for(int i=0;i<s.size();i++){
       if(i%2==0 && s[i]==x){
          auto it=v.upper_bound(i);
          ans+=(*it-i);
          v.erase(it);
       }
    }
    return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:7:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |     for(int i=0;i<s.size();i++){
      |                 ~^~~~~~~~~
shoes.cpp:11:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for(int i=0;i<s.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