Hello everyone i was solving an easy problem using GNU C++ 4.9.2, but i kept getting runtime error!! the problem was so easy, and the code is simple, which made with mad!! however in the end /after about 3 hours of thinking/ i found that the problem was with the return statement, i was writing return 1; instead of return 0;

but i couldn't understand why this is a runtime error??? can anyone explain to me please...

With many thanks...