why my code is showing time limit exceededlink text
Initialize s and m inside the for loop and instead of calculating s every time multiply with 5(s=s*5). Also write endl after printing c for every test case .
while(N%s!=0)
Will it not cause an infinite loop?
Like, say, N=4.
4%5=4
4%25=4
4%125=4
.
.
and similarly condition holds true for such s. Can you please give t a re-look? 
Again take my input. 4/5 =0 and 0!=1 is true always. Again infinite loop. Replace “!=” with “<=” and tell me the results.