Compilare: user.cpp: In function ‘void solve()’: user.cpp:30: warning: operation on ‘i’ may be undefined user.cpp: In function ‘int main()’: user.cpp:57: warning: unused variable ‘j’ user.cpp:57: warning: unused variable ‘k’ user.cpp:54: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:55: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:56: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:58: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void solve()’: user.cpp:23: warning: array subscript is below array bounds user.cpp:23: warning: array subscript is below array bounds