Compilare: user.cpp: In function ‘void Solve(int)’: user.cpp:30:9: warning: unused variable ‘p1’ [-Wunused-variable] int p1=1,p2=1; ^ user.cpp:30:14: warning: unused variable ‘p2’ [-Wunused-variable] int p1=1,p2=1; ^ user.cpp: In function ‘int main()’: user.cpp:61:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("prefix2.out","w",stdout); ^