Submission #1048268

#	Time	Username	Problem	Language	Result	Execution time	Memory
1048268		LittleOrange	Ancient Books (IOI17_books)	C++17	Compilation error	0 ms	0 KiB

books

#include "books.h"
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
long long minimum_walk(std::vector<int> p, int s) {
	ll ans = 0;
	ll n = p.size();
	if (s == 0){
		vector<ll> u(n,0);
		for(ll i = 0;i<n;i++){
			if(p[i]!=i){
				ans += i-s;
				s = i;
				ll x = i;
				do{
					ans += ans(p[x]-x);
					ll y = x;
					x = p[x];
					p[y] = y;
				} while(x!=i);
			}
		}
	}
	return ans;
}

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:16:23: error: 'ans' cannot be used as a function
   16 |      ans += ans(p[x]-x);
      |                       ^