s2 zadanie 3

#include <iostream>
#include <cstdlib>
#include <ctime>

using namespace std;

int main()
{
    int a=10,b=20,c=0;
    for(int i=1;i<=100;i++)
    {c=c+(a+rand()%(b-a+1));}
    cout<<c;
    return 0;
}