lake_不是我寫的

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void Lake(int x, int y, int n, int m, int** map, int* size) {
	(*size)++;
	int Origin = map[x][y]; 
	if (x + 1 < n) {
		if (map[x + 1][y] == Origin) {
			map[x][y] = 2;
			Lake(x + 1, y, n, m, map, size);
		}
	}
	if (x - 1 > -1) {
		if (map[x - 1][y] == Origin) {
			map[x][y] = 2;
			Lake(x - 1, y, n, m, map, size);
		}
	}
	if (y + 1 < m) {
		if (map[x][y + 1] == Origin) {
			map[x][y] = 2;
			Lake(x, y + 1, n, m, map, size);
		}
	}
	if (y - 1 > -1) {
		if (map[x][y - 1] == Origin) {
			map[x][y] = 2;
			Lake(x, y - 1, n, m, map, size);
		}
	}
	map[x][y] = 2;
}


int main() {

	int n, m, ** map, group = 0, * Size;
	scanf("%d %d", &n, &m);

	Size = (int*)malloc(sizeof(int) * (n * m / 2 + 1));
	map = (int**)malloc(sizeof(int*) * n);
	for (int i = 0; i < n; i++) {
		map[i] = (int*)malloc(sizeof(int) * m);
	}

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			scanf("%d", &map[i][j]);
		}
	}

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			if (map[i][j] == 1) {
				int size = 0;
				Lake(i, j, n, m, map, &size);
				Size[group] = size;
				group++;
			}
		}
	}




	for (int i = 1; i < group; i++) {
		for (int j = i; j > 0; j--) {
			if (Size[j] > Size[j - 1]) {
				int Tmp = Size[j];
				Size[j] = Size[j - 1];
				Size[j - 1] = Tmp;
			}
		}
	}

	for (int i = 0; i < group; i++) {
		if (i == 0) {
			printf("%d", Size[i]);
		}
		else {
			printf("\n%d", Size[i]);
		}
	}


	free(Size);
	for (int i = 0; i < n; i++) {
		free(map[i]);
	}
	free(map);
	return 0;
}