you give string current correct represent 24hour times24hour time format HHMM HH 00 23 MM 00 59 the early 24hour time 0000 late 2359in operation increase time current 1 5 15 60 minute you perform operation number timesreturn minimum number operation need convert current correct Example 1input current 0230 correct 0435output 3explanationwe convert current correct 3 operation follow add 60 minute current current 0330 add 60 minute current current 0430 Add 5 minute current current 0435it prove possible convert current correct few 3 operationsexample 2input current 1100 correct 1101output 1explanation we add minute current minimum number operation need 1 Constraintscurrent correct format HHMMcurrent correct