Compilare: user.cpp: In function ‘void read()’: user.cpp:16: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void solve()’: user.cpp:40: warning: operation on ‘C’ may be undefined user.cpp:44: warning: operation on ‘C’ may be undefined user.cpp:65: warning: operation on ‘L’ may be undefined user.cpp:69: warning: operation on ‘L’ may be undefined user.cpp:86: warning: operation on ‘C’ may be undefined user.cpp:90: warning: operation on ‘C’ may be undefined user.cpp: In function ‘void write()’: user.cpp:119: warning: too few arguments for format user.cpp: In function ‘void solve()’: user.cpp:90: warning: array subscript is below array bounds