Submission #1150637

#	Time	Username	Problem	Language	Result	Execution time	Memory
1150637		BlockOG	Friend (IOI14_friend)	C++20	100 / 100	15 ms	2120 KiB

friend

#include "friend.h"

// mrrrow meeow :3
// go play vivid/stasis! it's an awesome free game on steam

int vs[100000][2];

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

int findSample(int n, int confidence[], int host[], int protocol[]) {
    for (int i = 0; i < n; i++) vs[i][1] = confidence[i];
    
    for (int i = n; i-- > 1;) {
        int j = host[i];
        
        int nx = vs[j][0], cx = vs[j][1];
        int ny = vs[i][0], cy = vs[i][1];
        
        switch (protocol[i]) {
        case 0:
            vs[j][0] = max(nx + ny, nx + cy);
            vs[j][1] = cx + ny;
            break;
        case 1:
            vs[j][0] = nx + ny;
            vs[j][1] = max(cx + cy, max(cx + ny, nx + cy));
            break;
        case 2:
            vs[j][0] = nx + ny;
            vs[j][1] = max(cx + ny, nx + cy);
            break;
        }
    }
    
    return max(vs[0][0], vs[0][1]);
}

• Subtask 1: 11 / 11
• Subtask 2: 8 / 8
• Subtask 3: 8 / 8
• Subtask 4: 19 / 19
• Subtask 5: 23 / 23
• Subtask 6: 31 / 31