Submission #266444

#	Time	Username	Problem	Language	Result	Execution time	Memory
266444		wdjpng	Arranging Shoes (IOI19_shoes)	C++17	Compilation error	0 ms	0 KiB

shoes

#include <bits/stdc++.h>

#define rep(i,n) for(int i = 0; i  < n; i++)
#define lint long long
using namespace std;

lint count_swaps(vector<int> s){
    int n = s.size();
    vector<set<int>>set(2*n+1);
    vector<bool>ignore(2*n);

    rep(i,2*n){
        set[s[i]+n].insert(i);
    }
    int sum=0;
    rep(i,2*n){
        if(ignore[i]){continue;}
        int nearest=*set[-s[i]+n].begin();
        set[-s[i]+n].erase(set[-s[i]+n].begin());

        ignore[nearest]=true;
        if(s[i]>0){sum++;}
        sum+=nearest-i-1;
    }

    return sum;
}

signed main(){
    int n;
    cin >> n;
    vector<int>s(n);
    rep(i,n){cin>>s[i];}
    cout << count_swaps(s);
}

Compilation message (stderr)

/tmp/ccv6k4zz.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/cc7k6m1u.o:shoes.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status