poj1936_All in All

时间复杂度O(n)

 #include <stdio.h>
 #include <string.h>
 int main(){
     int al,bl,i,j;
     char a[+];
     char b[+];
     while(~scanf("%s%s",a,b)){
         al=strlen(a);
         bl=strlen(b);
         for(i=,j=;i<bl;++i){
             if(a[j]==b[i])
                 j++;
         }
         if(j==al)
             printf("Yes\n");
         else
             printf("No\n");
     }
     return ;
 }