Submission #915973

#	Time	Username	Problem	Language	Result	Execution time	Memory
915973		Aiperiii	Arranging Shoes (IOI19_shoes)	C++14	Compilation error	0 ms	0 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
#define pb push_back
long long count_swaps(std::vector<int> s) {
    int x=abs(s[0]);
    set <int> v;
    for(int i=0;i<s.size();i++){
       if(s[i]==-x && i%2==1)v.insert(i);
    }
    int 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<long long int>)':
shoes.cpp:12:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for(int i=0;i<s.size();i++){
      |                 ~^~~~~~~~~
shoes.cpp:16:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for(int i=0;i<s.size();i++){
      |                 ~^~~~~~~~~
/usr/bin/ld: /tmp/ccrARg89.o: in function `main':
grader.cpp:(.text.startup+0x29d): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status