Compilare: user.cpp: In function ‘int main()’: user.cpp:163:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int frq = 1; k < position[ A[i] ].size(); frq++, k++ ) ^ user.cpp:155:17: warning: unused variable ‘x’ [-Wunused-variable] int x = Q[ind].fi.fi, y = Q[ind].fi.se; ^ user.cpp:224:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int fr = 1; j < position[ A[i] ].size(); ++fr, ++j ) ^ user.cpp:110:24: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] FIN("rangemode.in"); ^ user.cpp:111:26: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] FOUT("rangemode.out"); ^