Submission #314479

#	Time	Username	Problem	Language	Result	Execution time	Memory
314479		VROOM_VARUN	Quality Of Living (IOI10_quality)	C++14	100 / 100	3409 ms	176180 KiB

quality

/*
ID: varunra2
LANG: C++
TASK: quality
*/

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

#ifdef DEBUG
#include "lib/debug.h"
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define debug_arr(...) \
  cerr << "[" << #__VA_ARGS__ << "]:", debug_arr(__VA_ARGS__)
#pragma GCC diagnostic ignored "-Wsign-compare"
//#pragma GCC diagnostic ignored "-Wunused-parameter"
//#pragma GCC diagnostic ignored "-Wunused-variable"
#else
#define debug(...) 42
#endif

#define EPS 1e-9
#define IN(A, B, C) assert(B <= A && A <= C)
#define INF (int)1e9
#define MEM(a, b) memset(a, (b), sizeof(a))
#define MOD 1000000007
#define MP make_pair
#define PB push_back
#define all(cont) cont.begin(), cont.end()
#define rall(cont) cont.end(), cont.begin()
#define x first
#define y second

const double PI = acos(-1.0);
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef map<int, int> MPII;
typedef multiset<int> MSETI;
typedef set<int> SETI;
typedef set<string> SETS;
typedef vector<int> VI;
typedef vector<PII> VII;
typedef vector<VI> VVI;
typedef vector<string> VS;

#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define trav(a, x) for(auto& a : x)
#define sz(x) (int)(x).size()
typedef pair<int, int> pii;
typedef vector<int> vi;
#pragma GCC diagnostic ignored "-Wsign-compare"
// util functions

const int MAXN = 3003;

VVI pref(MAXN, VI(MAXN));
VVI vals(MAXN, VI(MAXN, INF));
int h, w, r, c;

void clr() {
  trav(x, pref) {
    trav(y, x) y = 0;
  }
}

void genPref() {
  for(int i = 0; i < MAXN; i++) {
    for(int j = 0; j < MAXN; j++) {
      if(i) pref[i][j] += pref[i - 1][j];
      if(j) pref[i][j] += pref[i][j - 1];
      if(i and j) pref[i][j] -= pref[i - 1][j - 1];
    }
  }
}

int qry(int a, int b, int c, int d) {
  int ret = pref[c][d];
  if(a) ret -= pref[a - 1][d];
  if(b) ret -= pref[c][b - 1];
  if(a and b) ret += pref[a - 1][b - 1];
  return ret;
}

int qry(int i, int j) {
  return qry(i - h + 1, j - w + 1, i, j);
}

void gen(int x) {
  rep(i, 0, MAXN) rep(j, 0, MAXN) pref[i][j] = (bool)(vals[i][j] <= x);
  genPref();
}

bool works(int x) {
  gen(x);
  rep(i, h - 1, MAXN) rep(j, w - 1, MAXN) {
    if(qry(i, j) * 2 > h * w) return true;
  }
  return false;
}

int rectangle(int r, int c, int h, int w, int q[3001][3001]) {
  rep(i, 0, r) rep(j, 0, c) vals[i][j] = --q[i][j];
  ::r = r;
  ::c = c;
  ::h = h;
  ::w = w;
  int x = -1;
  int z = r * c;
  for(int b = z + 1; b >= 1; b /= 2) {
    while(!(works(x + b))) x += b;
  }
  return x + 2;
}

// int main() {
// #ifndef ONLINE_JUDGE
//   freopen("quality.in", "r", stdin);
//   freopen("quality.out", "w", stdout);
// #endif
//   cin.sync_with_stdio(0); cin.tie(0);

//   int qq;
//   cin >> qq;

//   while(qq--) {
//     int h, w, r, c;
//     cin >> h >> w >> r >> c;
//     int q[r][c];
//     for(int i = 0; i < r; i++) {
//       for(int j = 0; j < c; j++) {
//         cin >> q[i][j];
//       }
//     }
//     debug(rectangle(h, w, r, c, q));
//   }

//   return 0;
// }

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20