#include<iostream> #include<cstring> using namespace std; int a[1050][1050]; int qh(int a,int b) { int s=0; for(int i=a;i<=b;i++) { s+=i; } return s; } int main() { cout<<qh(10,20)<<endl; cout<<qh(20,30)<<endl; cout<<qh(35,45); return 0; }