Preprocessors sometimes only do dull string replacement jobs but with amazing effects.

/* Enter your macros here */

#define toStr(a) #a

#define io(v) cin>>v

#define INF 1000000000

#define FUNCTION(name, op) inline void name(int& m, int& c) {m = (m op c) ? m : c;} 

#define foreach(v, i) for(int i = 0; i < v.size(); i++)

#include <iostream>
#include <vector>
using namespace std;

#if !defined toStr || !defined io || !defined FUNCTION || !defined INF
#error Missing preprocessor definitions
#endif 

FUNCTION(minimum, <)
FUNCTION(maximum, >)

int main(){
	int n; cin >> n;
	vector<int> v(n);
	foreach(v, i) {
		io(v)[i];
	}
	int mn = INF;
	int mx = -INF;
	foreach(v, i) {
		minimum(mn, v[i]);
		maximum(mx, v[i]);
	}
	int ans = mx - mn;
	cout << toStr(Result =) <<' '<< ans;
	return 0;

}

References

1. https://fenghe.us/the-c-preprocessor/
2. http://www.cplusplus.com/doc/tutorial/preprocessor/