oj.uz

Submission #918491

# Submission time Handle Problem Language Result Execution time Memory
918491 2024-01-29T23:47:02 Z mircea_007 Friend (IOI14_friend) C++17
100 / 100
 20 ms 2172 KB 
#include "friend.h"

int min( int a, int b ) { return a < b ? a : b; }
int max( int a, int b ) { return a > b ? a : b; }

int findSample( int n, int confidence[], int host[], int protocol[] ) {
  int *choose = new int[n];
  int *not_choose = new int[n];

  for( int i = 0 ; i < n ; i++ ){
    choose[i] = confidence[i];
    not_choose[i] = 0;
  }

  for( int i = n - 1 ; i > 0 ; i-- ){
    // we merge the two nodes (i, host[i]) into one single node
    // this explains the wierd asignment of sums

    if( protocol[i] == 0 ){
      int new_choose = choose[host[i]] + not_choose[i]; // choose host[i] and not i
      int new_not_choose = not_choose[host[i]] + max( choose[i], not_choose[i] ); // choose i and not host[i] or choose none

      choose[host[i]] = new_choose;
      not_choose[host[i]] = new_not_choose;

    }else if( protocol[i] == 1 ){
      // if we choose any of the two nodes that means we choose the merged node
      int new_choose = max( choose[i] + choose[host[i]], max( choose[i] + not_choose[host[i]], not_choose[i] + choose[host[i]] ) );
      int new_not_choose = not_choose[host[i]] + not_choose[i];

      choose[host[i]] = new_choose;
      not_choose[host[i]] = new_not_choose;
      
    }else{
      int new_choose = max( choose[host[i]] + not_choose[i], not_choose[host[i]] + choose[i] );
      int new_not_choose = not_choose[i] + not_choose[host[i]];

      choose[host[i]] = new_choose;
      not_choose[host[i]] = new_not_choose;
    }
  }

  int ret = max( choose[0], not_choose[0] );

  delete []choose;
  delete []not_choose;

  return ret;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct

Subtask #5
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 20 ms 2144 KB Output is correct
13 Correct 10 ms 1368 KB Output is correct
14 Correct 17 ms 2172 KB Output is correct
15 Correct 17 ms 2140 KB Output is correct