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- class Solution {
- public:
- int countSubstrings(string s) {
- int n = s.length(), ans = 0;
- for(int i=0;i<n;i++){
- int st=i, end=i;
- while(st>=0 && end<n && s[st]==s[end]){
- ans++, st--, end++;
- }
- st=i, end=i+1;
- while(st>=0 && end<n && s[st]==s[end]){
- ans++, st--, end++;
- }
- }
- return ans;
- }
- };
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