Compilare: user.cpp: In function ‘void citire()’: user.cpp:6: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:9: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int main()’: user.cpp:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘int solve()’: user.cpp:13: warning: ‘elem’ may be used uninitialized in this function user.cpp: In function ‘int main()’: user.cpp:13: warning: ‘elem’ may be used uninitialized in this function user.cpp:13: note: ‘elem’ was declared here