the 1st line contains a positive integer t (<= 100), which is the time taken for Tony to delete/input a character;
What does that mean?

moin saadati said:

the 1st line contains a positive integer t (<= 100),** which is the time taken for Tony to delete/input a character; **
What does that mean?

that's means time to take the on "backspace" or "input a charachter" if in the first test case this variable was 2, result becames 40!