# include <stdio.h>
void myStrcat(char s[], char t[]){
int i,j;
for(i=0;s[i]!='\0';i++);
for(j=0;t[j]!='\0';j++){
s[i]=t[j];
i++;
}
}
int main(){
char s[100];
char t[100];
myStrcat(s,t);
return 0;
}
IyBpbmNsdWRlIDxzdGRpby5oPgoKdm9pZCBteVN0cmNhdChjaGFyIHNbXSwgY2hhciB0W10pewppbnQgaSxqOwpmb3IoaT0wO3NbaV0hPSdcMCc7aSsrKTsKZm9yKGo9MDt0W2pdIT0nXDAnO2orKyl7CglzW2ldPXRbal07CglpKys7Cn0KfQoKaW50IG1haW4oKXsKICAgIGNoYXIgc1sxMDBdOwogICAgY2hhciB0WzEwMF07CiAgICBzY2FuZigiJXMgJXMiLHMsdCk7CiAgICBwcmludGYoIiVzICsgJXMiLHMsdCk7CiAgICBteVN0cmNhdChzLHQpOwogICAgcHJpbnRmKCIgLT4gJXNcbiIscyk7CiAgICByZXR1cm4gMDsKfQo=