Hi everyone :) i was submitting
Educational Codeforces Round 17 problem A but on test 9 it gives me the correct answer but CF judge says different !! what should i do ?24222811
thanks :) Good day :)
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v.size() is an unsigned integer, when it equals 0, v.size() — 1 will be a large integer. So accessing v[i] would be undefined behaviour.
AC code (changing v.size() to (int)v.size()):
http://codeforces.com/contest/762/submission/24223520
thanks alot :)
v.size() - 1
is unsigned, so whenv
is empty it becomes equal to 4,294,967,295. Use(int) v.size() - 1
to make it work.Also, you might want to enable compiler warnings locally, so that the compiler reminds you about similar issues in the future.
thanks a lot :)
good idea :)
Probably you're not using the same compiler as codeforces!
yes that seemed to be the problem thx :)
use -->0 operator
for(size_t i = v.size(); i -->0 ; ){ ... }