Submission #1305123

#	Time	Username	Problem	Language	Result	Execution time	Memory
1305123		kawhiet	Mosaic (IOI24_mosaic)	C++20	12 / 100	1018 ms	2162688 KiB

mosaic

#include <bits/stdc++.h>
#include "mosaic.h"
using namespace std;

bool first = 1;
vector<vector<int>> a;
vector<vector<long long>> p;

long long get(int x1, int y1, int x2, int y2) {
  x1++; y1++; x2++; y2++;
  return p[x2][y2] - p[x2][y1 - 1] - p[x1 - 1][y2] + p[x1 - 1][y1 - 1];
}
  
vector<long long> mosaic(vector<int> x, vector<int> y, vector<int> t, vector<int> b, vector<int> l, vector<int> r) {
  int n = x.size(), q = t.size();
  if (first) {
    a.assign(n, vector<int>(n, -1));
    p.assign(n + 1, vector<long long>(n + 1, 0));
    a[0] = x;
    for (int i = 1; i < n; i++) {
      a[i][0] = y[i];
    }
    for (int i = 1; i < n; i++) {
      for (int j = 1; j < n; j++) {
        if ((a[i - 1][j] | a[i][j - 1]) == 0) {
          a[i][j] = 1;
        } else {
          a[i][j] = 0;
        }
      }
    }
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < n; j++) {
        p[i + 1][j + 1] = p[i + 1][j] + p[i][j + 1] - p[i][j] + a[i][j];
      }
    }
    first = 0;
  }
  vector<long long> ret;
  for (int i = 0; i < q; i++) {
    ret.push_back(get(t[i], l[i], b[i], r[i]));
  }
  return ret;
}

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 0 / 7
• Subtask 4: 0 / 10
• Subtask 5: 0 / 8
• Subtask 6: 0 / 22
• Subtask 7: 0 / 19
• Subtask 8: 0 / 22