Checking damaged resistance
(Much better, thanks). The resistor marked 100 in this case is 10 ohms. 

The left two digits are the value (10) and the right hand digit is the multiplier (10^0 = 1)

A resistor marked 101 would be 100 ohms. 

Unfortunately it's not possible to tell what the burned up resistor was, and it's quite likely that simply replacing it won't fix it (something else has gone wrong, most likely). 

If there was a repetitive pattern in the charger (one section for each cell) it might be possible to look at undamaged sections and find the value.