#include<iostream>
#include<string.h>
using namespace std;
void deleteStr_several(char*str,int start,int span){
int len=strlen(str);
if ((start<0)||(start>len-1)) return;
if ((start+span<-1)||(start+span>len)) return;
if(span>0){
for(int i=start;i<= len-span;i++){
str[i]=str[i+span];
}
}else{
for(int i=start+span+1;i<= len+span;i++){
str[i]=str[i-span];
}
}
}
int main(){
int start=5;
int span=3;
char str[]="0123456789";
deleteStr_several(str,start, span);
cout<<str<<endl;
char str1[]="0123456789";
span=-3;
deleteStr_several(str1,start, span);
cout<<str1<<endl;
}