Compilare: user.cpp: In function ‘int main()’: user.cpp:102: warning: comparison between signed and unsigned integer expressions user.cpp:107: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘void solve()’: user.cpp:72: warning: ‘jjj’ may be used uninitialized in this function user.cpp:72: warning: ‘iii’ may be used uninitialized in this function