AOJ 0046 Differential
#include <vector> #include <cstdio> #include <algorithm> using namespace std; int main() { double n; vector<double> v; while(~scanf("%lf", &n)) v.push_back(n); sort(v.begin(), v.end()); printf("%.1lf\n", *v.rbegin() - *v.begin()); return 0; }