Submission #516055

#	Time	Username	Problem	Language	Result	Execution time	Memory
516055		lovrot	Minerals (JOI19_minerals)	C++14	40 / 100	32 ms	2620 KiB

minerals

#include <bits/stdc++.h> 
#include "minerals.h"

#define vec vector
#define siz size()
#define pri(i, poc, n, pov) for(int i = (int) poc; i < (int) n; i += (int) pov)
#define pb push_back 
#define X first
#define Y second 

using namespace std;

const int N = 43010;

//bool on[N];
//int query_ans;
int qans;
vec<pair<int, int>> ans;
map<int, int> ans_esp;

/*
int Query(int x){
	int y = ans_esp[x]; 
		
	if(!on[x]){ 
		if(!on[y])
			query_ans++;
		on[x] = 1;
	}
	else{ 
		if(!on[y])
			query_ans--;
		on[x] = 0;
	}	

	//cout << "on query " << x << " " << query_ans << " " << query_ans - qans << "\n";

	return query_ans;
}*/

void divcon(vec<int> &a, vec<int> &b){	
	if(a.siz == 1){ 
		//ans.pb({a[0], b[0]});
		Answer(a[0], b[0]);
		return;
	}
	if(!a.siz){ 
		return;
	}

	vec<int> a_left;
	vec<int> b_left;
	vec<int> a_rght;
	vec<int> b_rght;

	int h = a.siz / 2;
	int raz, newans, pom;

	pri(i, 0, a.siz, 1){
		if(i < h){ 
			newans = Query(a[i]);
			raz = newans - qans;
			qans = newans;

			a_left.pb(a[i]);
		}
		else 
			a_rght.pb(a[i]);
	}

	/*if(raz != 0 && raz != 1)
		cout << "f\n";
	*/

	pri(i, 0, a.siz, 1){ 
		newans = Query(b[i]);
		pom = newans - qans;

		if((raz == 0 && pom == -1) || (raz == 1 && pom == 0)) 
			b_left.pb(b[i]);
		else{
			newans = Query(b[i]);
			b_rght.pb(b[i]);
		}
		qans = newans;
	}
	/*
	for(int i : a)
		cout << i << " ";
	cout << "\n";
	for(int i : b)
		cout << i << " ";
	cout << "\n";


	for(int i : a_left)
		cout << i << " ";
	cout << "\n";
	for(int i : b_left)
		cout << i << " ";
	cout << "\n\n";

	for(int i : a_rght)
		cout << i << " ";
	cout << "\n";
	for(int i : b_rght)
		cout << i << " ";
	cout << "\n---------------\n"; */

	divcon(a_left, b_left);
	divcon(a_rght, b_rght);	
}

void Solve(int n){ 
	vec<int> a;
	vec<int> b;

	int newans;
	
	pri(i, 1, n * 2 + 1, 1){
		newans = Query(i);
		if(newans - qans){
			a.pb(i);
		}
		else{ 
			b.pb(i);
		}	
		qans = newans;
	}	

	divcon(a, b);
}
/*
int main(){ 
	ios_base::sync_with_stdio(0);

	int n;

	cin >> n;

	for(int i = 0; i < n; i++){ 
		int x, y;
		cin >> x >> y;
		ans_esp[x] = y;
		ans_esp[y] = x;
	}

	Solve(n);

	for(int i = 0; i < n; i++){ 
		int x = ans[i].X;
		int y = ans[i].Y;

		if(ans_esp[x] != y && ans_esp[y] != x){ 
			cout << "Invalid\n";
			exit(0);
		}
	}

	cout << "Correct\n";
	return 0;
}
*/

Compilation message (stderr)

minerals.cpp: In function 'void divcon(std::vector<int>&, std::vector<int>&)':
minerals.cpp:79:38: warning: 'raz' may be used uninitialized in this function [-Wmaybe-uninitialized]
   79 |   if((raz == 0 && pom == -1) || (raz == 1 && pom == 0))
      |                                  ~~~~^~~~

• Subtask 1: 6 / 6
• Subtask 2: 25 / 25
• Subtask 3: 9 / 9
• Subtask 4: 0 / 30
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 10