pat1050 String Subtraction

#include<cstdio>#include<iostream>#include<algorithm>#include<vector>#include<queue>#include<string>#include<cstring>#include<cmath>#include<map>#define ll long longusing namespace std;char a[10005],b[10005];int h[256];int main(){  cin.getline(a,10003);  cin.getline(b,10003);  int la = strlen(a),lb = strlen(b);  for(int i = 0;i<lb;i++)h[b[i]] = 1;  for(int i = 0;i<la;i++)    if(!h[a[i]])printf("%c",a[i]);    return 0;}