gabaxxbzvxvxbmxsnnfcmdncvsxmn c cjkdsncmkdsmncx cbjasjkcnmssdmvnsm(mxknvjbdhvbhdxb0) jjgmnjbnbjgnjkvjnjvnjn//////,,khkmhkh

#include<iostream>
using namespace std;
int main(){
	int a,b,c=10000,d=0,m,n;
	cin>>m>>n;
	for(int l=1;l<=m;l++){
		for(int i=1;i<n;i++){
		cin>>b;
		if(b<c) c=b;
		if(b>d) d=b;
		
	}
	}
	cout<<d-c;
	return 0;
}
```
`

#include using namespace std; int main(){ int a,b,c=10000,d=0,m,n; cin>>m>>n; for(int l=1;l<=m;l++){ for(int i=1;i<n;i++){ cin>>b; if(b<c) c=b; if(b>d) d=b;

}
}
cout<<d-c;
return 0;

}

#include<iostream>
using namespace std;
int main(){
	int a,b,c=10000,d=0,m,n;
	cin>>m>>n;
	for(int l=1;l<=m;l++){
		for(int i=1;i<n;i++){
		cin>>b;
		if(b<c) c=b;
		if(b>d) d=b;
		
	}
	}
	cout<<d-c;
	return 0;
}