#include<iostream> #include<cstdio> //scanf()\printf() #include<cstring> #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int a=0,b=1,sum=0; for(int i=1;i<=10;i++){ a+=1; b+=1; sum=sum+a*b; } cout<<sum; return 0; }