Submission #416437

#	Time	Username	Problem	Language	Result	Execution time	Memory
416437		mjhmjh1104	Friend (IOI14_friend)	C++17	Compilation error	0 ms	0 KiB

friend

#include "friend.h"
#include <algorithm>
using namespace std;

int uf[1006];

int _find(int x) {
	if (uf[x] == -1) return x;
	return uf[x] = _find(uf[x]);
}

void _merge(int x, int y) {
	x = _find(x), y = _find(y);
	if (x != y) uf[x] = y, mx[y] = max(mx[y], mx[x]);
}

int findSample(int n, int confidence[], int host[], int protocol[]) {
	if (protocol[1] == 1) {
		int res = 0;
		for (int i = 0; i < n; i++) res += confidence[i];
		return res;
	} else if (protocol[1] == 2) {
		int res = 0;
		for (int i = 0; i < n; i++) res = max(res, confidence[i]);
		return res;
	} else {
		int res = 0;
		for (int i = 0; i < n; i++) uf[i] = -1, mx[i] = confidence[i];
		for (int i = 1; i < n; i++) _merge(host[i], i);
		for (int i = 0; i < n; i++) if (uf[i] == -1) res += mx[i];
		return res;
	}
}

Compilation message (stderr)

friend.cpp: In function 'void _merge(int, int)':
friend.cpp:14:25: error: 'mx' was not declared in this scope; did you mean 'x'?
   14 |  if (x != y) uf[x] = y, mx[y] = max(mx[y], mx[x]);
      |                         ^~
      |                         x
friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:28:43: error: 'mx' was not declared in this scope
   28 |   for (int i = 0; i < n; i++) uf[i] = -1, mx[i] = confidence[i];
      |                                           ^~
friend.cpp:30:55: error: 'mx' was not declared in this scope
   30 |   for (int i = 0; i < n; i++) if (uf[i] == -1) res += mx[i];
      |                                                       ^~