Sum that line X76711
Write a program that reads a series of lines, each of them containing a sequence of non negative integers, and prints as output the value of the sum of the first line that contains an even number of elements ending in 3. If there is no such line, the output will be -1.
For instance, for the input:
23 12 4 25 44 43 23 3 12 8 33 4 9 73 14 88 92 55
The output would be 133, because the third line contains 2 numbers
ending in 3 (33 and 73), and the previous lines contained an odd number
of such elements (1 and 3 respectively).
Thus, the third line is the
first with an even number of elements ending in 3. The sum of the
element of this line is 33+4+9+73+14 = 133
Input
The input is a series of lines with numbers. Each line contains at least one number.
Output
The output is the sum of the elements in the first line that happens to have an even number of elements ending in 3, or -1 if there is no such line.
Input
23 12 4 25 44 43 23 3 12 8 33 4 9 73 14 88 92 55
Output
133
Input
23 12 4 25 44 43 23 12 3 88 92 55 7 81 23 2 13 4
Output
235
Input
4 28 45 23 12 53 3 13 2 81 3 4 5 6
Output
-1
- Author
- ProAl professors
- Language
- English
- Official solutions
- Python
- User solutions
- Haskell Python