Submission #1311415

#	Time	Username	Problem	Language	Result	Execution time	Memory
1311415		nikoloz-ch	Arranging Shoes (IOI19_shoes)	C++20	Compilation error	0 ms	0 KiB

shoes

#include <bits/stdc++.h>
#include "shoes.h"
using namespace std;

long long count_swaps(vector<int> &S){
    long long ans = 0;
    map<int,int> mp;
    for(int i = 0; i < S.size(); i++){
        mp[S[i]] = i;
    } set<int> st;
    for(int i = 0; i < S.size(); i++){
        if(S[i] < 0) continue;
        if(st.find(S[i]) == st.end()){
            ans += abs(mp[S[i]]-mp[-S[i]]);
            st.insert(-S[i]); st.insert(S[i]);
        }
    }
    return ans;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccweA6lG.o: in function `main':
grader.cpp:(.text.startup+0x26b): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status