4-1买菜（满分）

    4
    1 3
    5 6
    9 13
    14 15
    2 4
    5 7
    10 11
    13 14
    
    
      
      
      
      
      
      
      
      
      
    

    3
    
    
      
    

    #include<stdio.h>
    #include<stdlib.h>
    #pragma warning(disable:4996)
    
    
    int main()
    {
    	int n, a, b, max;
    	scanf("%d", &n);
    	bool h[1000000] = { 0 };
    	bool w[1000000] = { 0 };
    	for (int i = 1; i <= n; i++) {
    		scanf("%d %d", &a, &b);
    		for (int j = a; j < b; j++) {//3~4:h[3]=1,h[4]=