oj.uz

Submission #542661

# Submission time Handle Problem Language Result Execution time Memory
542661 2022-03-27T13:03:22 Z alextodoran Friend (IOI14_friend) C++17
100 / 100
 25 ms 3444 KB 
/**
 ____ ____ ____ ____ ____
||a |||t |||o |||d |||o ||
||__|||__|||__|||__|||__||
|/__\|/__\|/__\|/__\|/__\|

**/

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int I_AM_YOUR_FRIEND = 0;
const int MY_FRIENDS_ARE_YOUR_FRIENDS = 1;
const int WE_ARE_YOUR_FRIENDS = 2;

int findSample (int n, int confidence[], int host[], int protocol[]) {
    int take[n], skip[n];
    for (int u = 0; u < n; u++) {
        take[u] = confidence[u];
        skip[u] = 0;
    }
    for (int u = n - 1; u > 0; u--) {
        int v = host[u];
        int newTake;
        int newSkip;
        if (protocol[u] == I_AM_YOUR_FRIEND) {
            newTake = take[v] + skip[u];
            newSkip = skip[v] + max(take[u], skip[u]);
        }
        if (protocol[u] == MY_FRIENDS_ARE_YOUR_FRIENDS) {
            newTake = max({take[u] + take[v], take[u] + skip[v], skip[u] + take[v]});
            newSkip = skip[u] + skip[v];
        }
        if (protocol[u] == WE_ARE_YOUR_FRIENDS) {
            newTake = max(take[u] + skip[v], skip[u] + take[v]);
            newSkip = skip[u] + skip[v];
        }
        take[v] = newTake;
        skip[v] = newSkip;
    }
    return max(take[0], skip[0]);
}

Compilation message

friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:41:17: warning: 'newTake' may be used uninitialized in this function [-Wmaybe-uninitialized]
   41 |         take[v] = newTake;
      |         ~~~~~~~~^~~~~~~~~
friend.cpp:42:17: warning: 'newSkip' may be used uninitialized in this function [-Wmaybe-uninitialized]
   42 |         skip[v] = newSkip;
      |         ~~~~~~~~^~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 304 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 232 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 308 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 1 ms 340 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 312 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 312 KB Output is correct
10 Correct 1 ms 320 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 312 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 312 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 1 ms 308 KB Output is correct
10 Correct 1 ms 340 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 312 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 304 KB Output is correct
5 Correct 1 ms 312 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 312 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 308 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 308 KB Output is correct
15 Correct 1 ms 340 KB Output is correct

Subtask #5
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 304 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 308 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 1 ms 304 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 25 ms 3444 KB Output is correct
13 Correct 14 ms 1876 KB Output is correct
14 Correct 24 ms 3096 KB Output is correct
15 Correct 24 ms 3104 KB Output is correct