Submission #263241

#	Time	Username	Problem	Language	Result	Execution time	Memory
263241		mjkocijan	Minerals (JOI19_minerals)	C++14	80 / 100	34 ms	3452 KiB

minerals

#include "minerals.h"
#include <bits/stdc++.h>
using namespace std;
#define X first
#define Y second
#define pb push_back
typedef long long ll;
typedef pair<ll, ll> ii;
#define MAXN 100100

vector<int> a, b;
int a1[MAXN];
vector<int> lo, hi, lo2, hi2;
int blo[MAXN], bhi[MAXN];
int mid, qq, q2;
int took[MAXN];

void Solve(int n)
{
	//memset(took, -1, sizeof took);
	for (int i = 0; i < 2 * n; i++) {
		a1[i] = Query(i + 1);
		if (!i || a1[i] != a1[i - 1])
			a.pb(i);
		else
			b.pb(i);
	}
	//for (int i = 0; i < 2 * n; i++) Query(i + 1);
	for (int i = 0; i < n; i++) {
		blo[i] = 0;
		bhi[i] = n - 1;
	}
	lo.pb(0); hi.pb(n - 1);
	while (1) {
		if (lo.size() == 1) {
			mid = (lo[0] + hi[0]) / 2;
			for (int i = mid + 1; i <= hi[0]; i++) {
				qq = Query(a[i] + 1);//cout<<a[i]+1<<'.'<<qq<<endl;
			}
		}
		else {
			for (int i = 0; i < lo.size(); i++) {
				mid = (lo[i] + hi[i]) / 2;
				if (i & 1) {
					for (int j = lo[i]; j <= mid; j++)
						qq = Query(a[j] + 1);
				}
				else {
					for (int j = mid + 1; j <= hi[i]; j++)
						qq = Query(a[j] + 1);
				}
			}
		}
		int ok = 0;
		for (int i = 0; i < n; i++) {
			if (blo[i] >= bhi[i]) {
				took[blo[i]] = 1;//cout<<i<<",\n";
				continue;
			}
			if (bhi[i] - blo[i] == 1) {
				if (took[bhi[i]]) {//cout<<i<<".\n";
					took[blo[i]] = 1;
					bhi[i] = blo[i];
					continue;
				}
				if (took[blo[i]]) {
					took[bhi[i]] = 1;//cout<<i<<"/\n";
					blo[i] = bhi[i];
					continue;
				}
			}
			mid = (blo[i] + bhi[i]) / 2;
			q2 = Query(b[i] + 1);//cout<<b[i]+1<<','<<q2<<',';
			if (qq == q2) {
				bhi[i] = mid;
			} else {
				blo[i] = mid + 1;
			}
			//cout << blo[i]<<'.'<<bhi[i]<<' ';
			if (blo[i] < bhi[i]) ok = 1;
			if (blo[i] >= bhi[i]) {//cout<<i<<' '<<blo[i]<<"!\n";
				took[blo[i]] = 1;
			}
			qq = q2;
		}//cout<<endl;
		if (!ok) break;
		lo2.clear(); hi2.clear();
		for (int i = 0; i < lo.size(); i++) {
			mid = (lo[i] + hi[i]) / 2;
			lo2.pb(lo[i]);
			lo2.pb(mid + 1);
			hi2.pb(mid);
			hi2.pb(hi[i]);
		}
		lo = lo2; hi = hi2;
	}
	for (int i = 0; i < n; i++) {
		//cout<<b[i]+1<<' '<<a[blo[i]]+1<<endl;
		Answer(b[i] + 1, a[blo[i]] + 1);
	}
	
	
  /*int v = Query(1);
  for (int i = 1; i <= N; ++i) {
    Answer(i, 2 * N + 1 - i);
  }*/
}

Compilation message (stderr)

minerals.cpp: In function 'void Solve(int)':
minerals.cpp:42:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |    for (int i = 0; i < lo.size(); i++) {
      |                    ~~^~~~~~~~~~~
minerals.cpp:88:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |   for (int i = 0; i < lo.size(); i++) {
      |                   ~~^~~~~~~~~~~

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