Submission #898100

#	Time	Username	Problem	Language	Result	Execution time	Memory
898100		Litusiano	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	Compilation error	0 ms	0 KiB

sortbooks

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

#define endl '\n'

struct MST{
	int n;
	vector<vector<int>> seg;
	void init(int n1){
		n = 1;
		while(n < n1) n*=2;

	}
};

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
  int n,q; cin>>n>>q;
  vector<int> v(n); for(int& i : v) cin>>i;
 	for(int i = 1; i<n; i++){
  	pre[i+1] = pre[i] + (v[i] < v[i-1]); 
  }
  while(q--){
  	int l,r,k; cin>>l>>r>>k;
  	if(n > 600){
  		if(pre[r] - pre[l] == 0) cout<<1<<endl;
  		else cout<<0<<endl;
  	}
  	else{
  		int mx = 0;
	  	for(int i = l; i <= r; i++){
	  		for(int j = i+1; j<=r; j++){
	  			if(v[i] > v[j]) mx = max(mx,v[i] + v[j]); // ill have to swap them
	  		}
	  	}
	  	if(mx > k) cout<<0<<endl;
	  	else cout<<1<<endl;
  	}
  	
  	
  }
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:22:4: error: 'pre' was not declared in this scope
   22 |    pre[i+1] = pre[i] + (v[i] < v[i-1]);
      |    ^~~
sortbooks.cpp:27:8: error: 'pre' was not declared in this scope
   27 |     if(pre[r] - pre[l] == 0) cout<<1<<endl;
      |        ^~~