Uva 10340 - All in All

#include<iostream>#include<cstdio>#include<cstring>#include<algorithm>using namespace std;#define lson l,m,rt<<1#define rson m+1,r,rt<<1|1int main(){    char ch[210005],s[210005];    while(~scanf("%s%s",ch,s)) {        int j=0,k=0;        for(int i=0;i<strlen(ch);i++) {            while(s[j]!=ch[i]&&j<strlen(s)) j++;            if(s[j]==ch[i]) k++,j++;        }        if(k==strlen(ch))            cout<<"Yes"<<endl;        else            cout<<"No"<<endl;    }    return 0;}