oj.uz

Submission #389340

# Submission time Handle Problem Language Result Execution time Memory
389340 2021-04-14T03:13:25 Z VROOM_VARUN Watching (JOI13_watching) C++14
50 / 100
 1000 ms 16024 KB 
/*
ID: varunra2
LANG: C++
TASK: watching
*/

#include <bits/stdc++.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

int n, p, q;
VI vals;

VVI dp;

void init() {
  vals.resize(n);
  p = min(p, n);
  q = min(q, n);
  dp.resize(p + 1);
  trav(x, dp) x.resize(q + 1);
}

bool works(int w, bool deb = false) {
  if (p + q >= n) return true;
  trav(x, dp) trav(y, x) y = 0;
  for (int i = 0; i <= p; i++) {
    for (int j = 0; j <= q; j++) {
      if (dp[i][j] == n) {
        return true;
      }
      if (i < p) {
        int to = vals[dp[i][j]] + w;
        int ind = lower_bound(all(vals), to) - vals.begin();
        dp[i + 1][j] = max(dp[i + 1][j], ind);
      }
      if (j < q) {
        int to = vals[dp[i][j]] + 2 * w;
        int ind = lower_bound(all(vals), to) - vals.begin();
        dp[i][j + 1] = max(dp[i][j + 1], ind);
      }
    }
  }
  return false;
}

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

  cin >> n >> p >> q;

  init();

  trav(x, vals) cin >> x;

  sort(all(vals));

  int x = -1;

  for (int b = INF; b >= 1; b /= 2) {
    while (!works(x + b)) x += b;
  }

  cout << max(1, x + 1) << '\n';

  return 0;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 2 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct

Subtask #2
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 6 ms 9164 KB Output is correct
4 Correct 1 ms 972 KB Output is correct
5 Correct 1 ms 848 KB Output is correct
6 Correct 10 ms 16024 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 161 ms 672 KB Output is correct
9 Correct 142 ms 696 KB Output is correct
10 Correct 148 ms 972 KB Output is correct
11 Correct 121 ms 972 KB Output is correct
12 Execution timed out 1047 ms 4100 KB Time limit exceeded
13 Halted 0 ms 0 KB -