Goal
The sum of a set of N integers is S.
Unfortunately, the plus signs have disappeared and the integers have been concatenated in a string O...
You have to find the positions of the plus signs to recover the addition.
If there is no solution , then print No solution, otherwise print the solution(s) in lexicographic order ( 1+11 before 11+1 ).
Input
Line 1 : An integer N as the number of terms in the addition
Line 2 : A long integer S as the sum of the N integers
Line 3 : A string O as the concatenation of the N integers
Output
If there is no solution, print No solution.
Otherwise, print the solution(s), one per line, ordered in lexicographic order (+ before 0,1,2,3...) , formatted as a valid equation a1+a2+...+aN=S
