Compilare: user.cpp: In function ‘void read()’: user.cpp:15: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void solve()’: user.cpp:38: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:35: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:32: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result