added solution 4 for problem_20#1476
Merged
cclauss merged 1 commit intoTheAlgorithms:masterfrom Oct 27, 2019
suadjelili:master
Merged
added solution 4 for problem_20#1476cclauss merged 1 commit intoTheAlgorithms:masterfrom suadjelili:master
cclauss merged 1 commit intoTheAlgorithms:masterfrom
suadjelili:master