#include <stdio.h>#include <string.h>#define SIZE 100int n, m, p, count;int a[SIZE][SIZE];void colour(int x, int y){ count++; a[x][y] = 1; if ((x > 1) && (a[x - 1][y] == 0)) colour(x - 1, y); if ((y > 1) && (a[x][y - 1] == 0)) colour(x, y - 1); if ((x < n) && (a[x + 1][y] == 0)) colour(x + 1, y); if ((y < m) && (a[x][y + 1] == 0)) colour(x, y + 1);}int main(){ int i, j, x, y, ans; memset(a, 0, sizeof(a)); scanf("%d%d%d", &n, &m, &p); for (i = 1; i <= p; i++) { scanf("%d%d", &x, &y); a[x][y] = 1; } ans = 0;for (i = 1; i <= n; i++) for (j = 1; j <= m; j++) if (a[i][j] == 0) { count = 0; colour(i, j); if (ans < count) ans = count; } printf("%d\n", ans); return 0;}输入： 6 5 9 1 4 2 3 2 4 3 2 4 1 4 3 4 5 5 4 6 4 输出：_________