Submission #1316898

#	Time	Username	Problem	Language	Result	Execution time	Memory
1316898		exoworldgd	Cave (IOI13_cave)	C++20	Compilation error	0 ms	0 KiB

cave

#include<bits/stdc++.h>
#include"cave.h"
#define ll long long
#define exoworldgd cin.tie(0)->sync_with_stdio(0),cout.tie(0)
using namespace std;
void exploreCave(int n){
	int s[n],d[n];
	bool v[n];
	for(int i=0;i<n;i++)s[i]=0,d[i]=i,v[i]=0;
	auto ok=[&](int x,int r,int f)->bool{
		int t[n];
		for(int i=0;i<n;i++)t[i]=s[i];
		if(f)for(int i=0;i<=r;i++)if(!v[i])t[i]^=1;
		elsefor(int i=r+1;i<n;i++)if(!v[i])t[i]^=1;
		return tryCombination(t)!=x;
	};
	for(int i=0;i<n;i++){
		int pos=tryCombination(s);
		bool lk=0;
		if(pos==i)lk=1;
		int l=0,r=n-1,ans=0;
		while(l<=r){
			int m=(l+r)>>1;
			if(ok(i,m,lk))ans=m,r=m-1;
			else l=m+1;
		}
		s[ans]^=lk,v[ans]=1,d[ans]=i;
	}
	answer(s,d);
}

Compilation message (stderr)

cave.cpp: In lambda function:
cave.cpp:14:25: error: expected primary-expression before 'int'
   14 |                 elsefor(int i=r+1;i<n;i++)if(!v[i])t[i]^=1;
      |                         ^~~
cave.cpp:14:35: error: 'i' was not declared in this scope
   14 |                 elsefor(int i=r+1;i<n;i++)if(!v[i])t[i]^=1;
      |                                   ^