Simple and easy to understand!
Intuition\n Describe your first thoughts on how to solve this problem. \n\n# Approach\n Describe your approach to solving the problem. \n\n# Complexity\n- Time 
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n\n# Complexity\n- Time complexity: O(n)-->Here, n is length of string array \n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\n\n- Space complexity: O(1)\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\n\n# Code\n```\nclass Solution {\n    public int countSeniors(String[] details) {\n        int seniorCitizens=0;\n       for(String s :details){\n          if(((s.charAt(11)-\'0\')*10+(s.charAt(12)-\'0\'))>60){\n            seniorCitizens=seniorCitizens+1;\n          }\n       }\n       return seniorCitizens; \n    }\n}\n```
['Java']