Problem 1 read a string and decide if it is an integer or not
Input
1340
output 
Integer
-----------------
Input
-0431
output 
Integer
-----------------
Input
-+123
output 
Not an Integer
-----------------
Input
-12-
output 
Not an Integer
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Problem 2 read a string (possible contains soaces, remove the spaces and decide if it is a palendrome or not.
Input
Hi my name
output
Himyname
No
-----------------
Input
ab c a acba
output
abcaacba
YES
-----------------
Input
1234 5 6
output
123456
NO
-----------------
Input
a b a
output
aba
YES
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Problem  3 read n, followed by a square matrix of size n and display the uppr diagonal in a diagonal format
Input
3
1 5 2
3 7 1
4 9 8
output
1  7  8  5  1  2
-----------------
Input
4
3 2 1 0
4 1 4 2
3 1 2 7
9 8 9 0

output
3  1  2  0  2  4  7  1  2  0
-----------------
Input
4
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
output
1  6  1  16  2  7  12  3  8  4