while True:     try:         from decimal import Decimal,getcontext         getcontext().prec=1010         a,b,n=map(int,input().split())         m=str(input())         s=Decimal(a)/Decimal(b)         s=str(s)         s=list(s)         y=0         for x in range(len(s)):             if s[x]=='.':   ...

while True:     try:         n=int(input())         if n==0:             break         i=2         while i<=int(n**0.5):             if n%(i**2)==0:                 print('Yes')                 break             i+=1         if  i>int(n**0.5):             print('No')     except:         break

import sys import binascii try:     while True:         C=[0,1,2,3,4,5,6,7,8,9,'A','b','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V']         m=input()         sum=0         ci=0         B=list(m)         A=B[::-1]         D=[]         for i in A:             if int...

#include<stdio.h> int main(){     int n,k,i,sum=0,m=0;     int a[n];     scanf("%d",&n);     for (i=1;i<=n;i++)     {         sum=sum+i;         a[i]=sum;     }     for(k=1;k<=n;k++)         m=m+a[k];     printf("%d",m);     return 0; }