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thank you,
i didn't understood why i always get WA
After reading ypour post i've solved!!!

I've solved, so you can delete the code!!!

#include<iostream> #include<string> #define PROVA #ifdef PROVA #include<fstream> using std::ofstream; using std::ifstream; using std::string; //using std::cout; ofstream cout("output.txt"); ifstream cin("input.txt"); #endif #ifndef PROVA using std::cin; using std::cout; using std...

i've solved!
There was a problem with input!
I had to put a test of nullity after cin!

What's wrong in my code (that could be optimised) #include<iostream> //#define PROVA #ifdef PROVA #include<fstream> using std::ofstream; using std::ifstream; //using std::cout; ofstream cout("output.txt"); ifstream cin("input.txt"); #endif #ifndef PROVA using std::cin; using std:...

Hallo to everybody, first of all sorry for my english!!! Can anyone help me understanding what's wrong in my program Here's the code #include<iostream> #include<stdio.h> #include<iomanip> //#define PROVA #ifdef PROVA #include<fstream> using std::ofstream; using std::ifstream; using std::setprecision...