Submission #1036242

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1036242	2024-07-27T06:54:07 Z	Alihan_8	The Big Prize (IOI17_prize)	C++17	Compilation error	0 ms	0 KB

prize

#include "prize.h"

#include <bits/stdc++.h>

using namespace std;

#define all(x) x.begin(), x.end()
#define ar array
#define pb push_back
#define ln '\n'
//#define int long long

using i64 = long long;

template <class F, class _S>
bool chmin(F &u, const _S &v){
    bool flag = false;
    if ( u > v ){
        u = v; flag |= true;
    }
    return flag;
}

template <class F, class _S>
bool chmax(F &u, const _S &v){
    bool flag = false;
    if ( u < v ){
        u = v; flag |= true;
    }
    return flag;
}

int find_best(int n){
	vector <vector<int>> dp(n);
	
	auto f = [&](int j){
		if ( dp[j].empty() ){
			dp[j] = ask(j);
		}
		
		return dp[j];
	};
	
	int ans = -1;
	
	if ( rnd(0, 1) ){
		for ( int i = n - 1; i >= 0; i-- ){
			auto c = f(i);
			
			if ( c[0] + c[1] == 0 ){
				ans = i;
				
				return ans;
			}
			
			int l = 0, r = i;
			
			while ( l < r ){
				int m = (l + r) / 2;
				
				if ( f(m) != c ){
					l = m + 1;
				} else r = m;
			}
			
			i = l; 
		}
	} else{
		for ( int i = 0; i < n; i++ ){
			auto c = f(i);
			
			if ( c[0] + c[1] == 0 ){
				ans = i;
				
				return ans;
			}
			
			int l = i, r = n;
			
			while ( l + 1 < r ){
				int m = (l + r) / 2;
				
				if ( f(m) != c ){
					r = m;
				} else l = m;
			}
			
			i = l; 
		}
	}
	
	assert(false);
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:46:7: error: 'rnd' was not declared in this scope; did you mean 'rand'?
   46 |  if ( rnd(0, 1) ){
      |       ^~~
      |       rand