Submission #443349

#	Time	Username	Problem	Language	Result	Execution time	Memory
443349		mkisic	Rectangles (IOI19_rect)	C++14	0 / 100	452 ms	98344 KiB

rect

#include "rect.h"
#include <queue>
#include <cassert>
#include <iostream>
#include <cstring>
#include <vector>
#include <algorithm>
using namespace std;

typedef pair <int, int> pii;

#define TRACE(x) cerr << #x << ' ' << x << endl
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define REP(i, n) FOR(i, 0, n)
#define _ <<  " " <<

#define fi first
#define sec second

#define pb push_back

const int MAXN = 2501;
const int smjerx[] = {1, -1, 0, 0};
const int smjery[] = {0, 0, 1, -1};

int p[MAXN][MAXN];
int bio[MAXN][MAXN];
int n, m;

bool bfs(int X, int Y) {
  queue <int> q;
  q.push(X);
  q.push(Y);
  bio[X][Y] = 1;
  int maxX = X;
  int maxY = Y;
  int minX = X;
  int minY = Y;
  int rub = 0;
  int cnt = 0;
  while (!q.empty()) {
    int x = q.front();
    q.pop();
    int y = q.front();
    q.pop();
    maxX = max(maxX, x);
    maxY = max(maxY, y);
    minX = min(minX, x);
    minY = min(minY, y);
    cnt++;
    if (x == 0 || x == n - 1 || y == 0 || y == m - 1) rub++;
    REP(i, 4) {
      int nx = x + smjerx[i];
      int ny = y + smjery[i];
      if (nx < 0 || ny < 0 || nx >= n || ny >= m || bio[nx][ny] || p[nx][ny]) continue;
      bio[nx][ny] = 1;
      q.push(nx);
      q.push(ny);
    }
  }
  return (rub == 0) && (maxX - minX + 1) * (maxY - minY + 1) == cnt;
}

long long solve1() {
  int ret = 0;
  REP(i, n) REP(j, m) {
    if (bio[i][j] || p[i][j]) continue;
    ret += bfs(i, j);
  }
  return ret;
}


long long count_rectangles(std::vector<std::vector<int> > a) {
	n = a.size();
  m = a[0].size();
  REP(i, n) REP(j, m) p[i][j] = a[i][j];

  int maks = 0;
  REP(i, n) REP(j, m) maks = max(maks, p[i][j]);

  if (maks == 1) return solve1();
  return 1;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 7
• Subtask 3: 0 / 12
• Subtask 4: 0 / 22
• Subtask 5: 0 / 10
• Subtask 6: 0 / 13
• Subtask 7: 0 / 28