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Submission #564891

# Submission time Handle Problem Language Result Execution time Memory
564891 2022-05-19T23:06:10 Z SSRS Watching (JOI13_watching) C++14
50 / 100
 210 ms 262144 KB 
#include <bits/stdc++.h>
using namespace std;
int main(){
  int N, P, Q;
  cin >> N >> P >> Q;
  P = min(P, N);
  Q = min(Q, N);
  vector<int> A(N);
  for (int i = 0; i < N; i++){
    cin >> A[i];
  }
  sort(A.begin(), A.end());
  int tv = 500000000, fv = 0;
  while (tv - fv > 1){
    int mid = (tv + fv) / 2;
    vector<int> R1(N + 1), R2(N + 1);
    for (int i = 0; i < N; i++){
      R1[i] = lower_bound(A.begin(), A.end(), A[i] + mid) - A.begin();
      R2[i] = lower_bound(A.begin(), A.end(), A[i] + mid * 2) - A.begin();
    }
    R1[N] = N;
    R2[N] = N;
    vector<vector<vector<bool>>> dp(N + 1, vector<vector<bool>>(P + 1, vector<bool>(Q + 1, false)));
    dp[0][0][0] = true;
    for (int i = 0; i <= N; i++){
      for (int j = 0; j <= P; j++){
        for (int k = 0; k <= Q; k++){
          if (dp[i][j][k]){
            if (j < P){
              dp[R1[i]][j + 1][k] = true;
            }
            if (k < Q){
              dp[R2[i]][j][k + 1] = true;
            }
          }
        }
      }
    }
    if (dp[N][P][Q]){
      tv = mid;
    } else {
      fv = mid;
    }
  }
  cout << tv << endl;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 22 ms 980 KB Output is correct
5 Correct 8 ms 340 KB Output is correct
6 Correct 91 ms 980 KB Output is correct
7 Correct 2 ms 212 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 4 ms 340 KB Output is correct
10 Correct 18 ms 416 KB Output is correct
11 Correct 22 ms 732 KB Output is correct
12 Correct 41 ms 596 KB Output is correct
13 Correct 2 ms 212 KB Output is correct
14 Correct 3 ms 340 KB Output is correct
15 Correct 2 ms 340 KB Output is correct

Subtask #2
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 596 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Runtime error 210 ms 262144 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -