Submission #416419

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
416419	2021-06-02 11:18:19	DEQK	Watching (JOI13_watching)	C++17	100 / 100	363 ms	4104 KiB

watching

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const int N = 300312;
int n, p, q;
int main() {
  ios_base::sync_with_stdio(0), cin.tie(0);
  cin >> n >> p >> q;
  vector<int> a(n);
  for(int i = 0; i < n; i++) {
    cin >> a[i];
  }
  sort(a.begin(), a.end());
  if(p + q >= n) {
    cout << 1;
    return 0;
  } 
  int l = 0, r = 1e9, re;
  while(r >= l) {
    int m = l + r >> 1;
    int ok = 1;
    vector<vector<int>> dp(p + 1, vector<int> (q + 1));
    for(int i = 0; i <= p; i++) {
      int x = 0;
      for(int j = 0; j <= q; j++) {
        while(x < n && a[x] <= dp[i][j]) x++;
        if(i < p) {
          dp[i + 1][j] = max(dp[i][j], dp[i + 1][j]);
          if(x < int(a.size())) {
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

watching.cpp: In function 'int main()':
watching.cpp:21:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   21 |   int m = l + r >> 1;
      |           ~~^~~
watching.cpp:47:10: warning: 're' may be used uninitialized in this function [-Wmaybe-uninitialized]
   47 |  cout << re;
      |          ^~

• Subtask 1: 50 / 50
• Subtask 2: 50 / 50