Compilare: user.cpp: In function ‘void SolveTestCase()’: user.cpp:29:15: warning: unused variable ‘X’ [-Wunused-variable] int N, M, X, Y, Z; ^ user.cpp:29:18: warning: unused variable ‘Y’ [-Wunused-variable] int N, M, X, Y, Z; ^ user.cpp:29:21: warning: unused variable ‘Z’ [-Wunused-variable] int N, M, X, Y, Z; ^ user.cpp:31:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d %d", &N, &M ); ^ user.cpp: In function ‘int main(int, const char**)’: user.cpp:40:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "algola.in" , "r", stdin ); ^ user.cpp:41:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "algola.out", "w", stdout ); ^