# include <stdio.h>
void myStrcat(char s[], char t[]){
int i,n=0;
for(i=0;s[i]!='\0';i++){
}
for(n=0;t[n]!='\0';n++,i++){
s[i]=t[n];
}
s[i]='\0';
}
int main(){
char s[100];
char t[100];
myStrcat(s,t);
return 0;
}
IyBpbmNsdWRlIDxzdGRpby5oPgoKdm9pZCBteVN0cmNhdChjaGFyIHNbXSwgY2hhciB0W10pewoJaW50IGksbj0wOwoJZm9yKGk9MDtzW2ldIT0nXDAnO2krKyl7Cgl9Cglmb3Iobj0wO3Rbbl0hPSdcMCc7bisrLGkrKyl7CgkJc1tpXT10W25dOwoJfQoJc1tpXT0nXDAnOwp9CgppbnQgbWFpbigpewogICAgY2hhciBzWzEwMF07CiAgICBjaGFyIHRbMTAwXTsKICAgIHNjYW5mKCIlcyAlcyIscyx0KTsKICAgIHByaW50ZigiJXMgKyAlcyIscyx0KTsKICAgIG15U3RyY2F0KHMsdCk7CiAgICBwcmludGYoIiAtPiAlc1xuIixzKTsKICAgIHJldHVybiAwOwp9Cg==