Java || Beginner-friendly || Well-commented code explanation
Below is commented Java code -\n\n\nclass Solution {\n    public int minNumberOfHours(int initialEnergy, int initialExperience, int[] energy, int[] experience) 
Below is commented Java code -\n\n```\nclass Solution {\n    public int minNumberOfHours(int initialEnergy, int initialExperience, int[] energy, int[] experience) {\n        int i;\n        int n = energy.length;\n        // \'ans\' will track minimum number of training hours\n        int ans = 0;\n        for(i=0;i<n;i++){\n            // If initial energy is more then we simply take a portion of this\n            // i.e. we decrement it by energy[i]\n            if(initialEnergy > energy[i]){\n                initialEnergy -= energy[i];\n            }\n            else{\n                // (initialEnergy <= energy[i])\n                // if we had less or equal initial energy, then how much more energy do we need?\n                // we need (energy[i] - initialEnergy + 1) more initial energy. Because only then\n                // our initial energy will be more than energy[i]\n                // For example, if energy[i] = 4 and initialEnergy = 3, then we need\n                // 2 more energy units i.e. (4 - 3 + 1) units more are needed in initialEnergy\n                // so we add this amount in the answer\n                ans += (energy[i] - initialEnergy + 1);\n                // add this to initial energy because that much amount more is needed\n                initialEnergy += (energy[i] - initialEnergy + 1);\n                // now we consumed energy[i] so decrement it from initial energy\n                initialEnergy -= energy[i];\n            }\n            \n            if(initialExperience > experience[i]){\n                // If initial experience is more then we simply add it to experience[i]\n                initialExperience += experience[i];\n            }\n            else {\n                // (initialExperience <= experience[i])\n                // In case we had less than or equal experience, then how much more initial\n                // experience do we need?\n                // We will need (experience[i] - initialExperience) + 1.\n                // Same example as given in above comments (this time for experience)\n                ans += (experience[i] - initialExperience) + 1;\n                // add this to initial experience because that much amount more is needed\n                initialExperience += (experience[i] - initialExperience) + 1;\n                // now our experience will increase because \n                // condition of -> initialExperience > experience[i] is now satisfied\n                initialExperience += experience[i];\n            }\n        }\n        \n        // return minimum number of hours\n        return ans;\n    }\n}\n```\n\n\n*Kindly upvote if this solution has helped you.\nThanks for reading! :)*
['Java']