class Solution { public: bool repeatedSubstringPattern(string s) { int n =s.size(); int i=1; while(s[0]!=s[i]&&i<n) i++; int sum =i; if(n/2<i) return false; int j=0; while(i<2*sum){ if(s[j]==s[i]) {i++;j++;} else {return false ;} } return true; } };
unsolved problem
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