NYOJ2 括号配对问题

原题链接

#include <stdio.h>
char buf[10001];

int main(){
int t;
char *p, ch;
scanf("%d\n", &t);
while(t--){
buf[0] = getchar();
p = buf + 1;
while((ch = getchar()) != '\n'){
if(ch - 1 == *(p - 1) || ch - 2 == *(p - 1))
--p;
else *p++ = ch;
}
printf(p == buf? "Yes\n": "No\n");
}
return 0;
}