Hi codeforces, i give this problem to one of my friends 1082 — Array Queries

after a while he tell me that he got RTE and ask me why..i look at the code and it was as same as my code except one thing..he use fastIO with cin cout...but i use scanf and printf..i change his code to use scanf printf and submit it..i got AC anyone know why this is happen..

this is the RTE code https://ideone.com/lGSRDC

and this is the AC code https://ideone.com/syamOk

thanks in advance.