1159 Sum of Consecutive Even Numbers

URI Online Judge | 1159

Sum of Consecutive Even Numbers

The program must read an integer X indefinite times (stop when X=0). For each X, print the sum of five consecutive even numbers from X, including it if X is even. If the input number is 4, for example, the output must be 40, that is the result of the operation: 4+6+8+10+12. If the input number is 11, for example, the output must be 80, that is the result of 12+14+16+18+20.

Input

The input file contains many integer numbers. The last one is zero.

Output

Print the output according to the example below.

Input Sample	Output Sample
4 11 0	40 80

Solution:

#include<stdio.h> int main() {     int n,i,sum=0;     while(1)     {         sum=0;         scanf("%d",&n);         if(n==0)            break;         if(n%2!=0)             n++;         for(i = 1;i <= 5;i++){             sum += n;             n += 2;         }         printf("%d\n",sum);     }     return 0; }