Submission #922077

#	Time	Username	Problem	Language	Result	Execution time	Memory
922077		Nurislam	Arranging Shoes (IOI19_shoes)	C++14	Compilation error	0 ms	0 KiB

shoes

#include "shoes.h"
#include "grader.cpp"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> 
#include <ext/pb_ds/tree_policy.hpp> 

using namespace std;
using namespace __gnu_pbds;

#define order_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update> 
long long count_swaps(std::vector<int> a) {
	int n = a.size()/2;
	int la[n*2]{};
	queue<int> pos[n+1], neg[n+1];
	for(int i = 0; i < n*2; i++){
		int x = a[i];
		if(x < 0){
			if(!pos[-a[i]].empty()){
				la[pos[-a[i]].front()] = i;
				pos[-a[i]].pop();
			}else{
				neg[-a[i]].push(i);
			}
		}else{
			if(!neg[a[i]].empty()){
				la[neg[a[i]].front()] = i;
				neg[a[i]].pop();
			}else{
				pos[a[i]].push(i);
			}
		}
	}
	order_set st;
	int ans = 0, us[n*2]{};
	for(int i = 0; i < n*2; i++){
		if(us[i]){
			st.erase(i);
			continue;
		}
		int r = st.order_of_key(la[i]);
		ans += la[i]-i-r;
		if(a[i] < 0)ans--;
		st.insert(la[i]);
		us[la[i]]++;
	}
	return ans;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccV95f72.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccxUetk3.o:shoes.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status