Submission #677047

#	Time	Username	Problem	Language	Result	Execution time	Memory
677047		hello_there_123	Arranging Shoes (IOI19_shoes)	C++17	Compilation error	0 ms	0 KiB

shoes

#include<bits/stdc++.h>
#include "shoes.h"
using namespace std;
#define int long long 
int n;
int ft[100005];
inline int ls(int x){return x & -x; }
int qry(int p){
	p++;
	if(p<1) return 0;
	int r = 0;
	for(;p;p-=ls(p)) r+=ft[p];
	return r;
}
void upd(int p, int v){
	p++;
	for(;p<=n;p+=ls(p)) ft[p]+=v;
}
long long count_swaps(vector<int>s) {
    int ans = 0;
	n = s.size(); 
	map<int,queue<int> >mp;
	for(int i=0;i<n;i++){
		int x = s[i];
		mp[x].push(i);
	}
	bool arr[n+3];
	memset(arr,0,sizeof(arr));
	for(int i=0;i<n;i++){
		
		mp[s[i]].pop();
		if(arr[i]) continue;
		int first = mp[-s[i]].front();
		mp[-arr[i]].pop();
		ans+=first-i-1-(qry(first)-qry(i-1));
		upd(first,1);
		arr[first] = 1;
		if(s[i]>0) ans++;
	}
	return ans;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccNNijI3.o: in function `main':
grader.cpp:(.text.startup+0x2a8): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status