Compilare: main.cpp: In function 'bool mysearch(int)': main.cpp:14:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < myhash[h].size() && myhash[h][i] != x) i ++; ~~^~~~~~~~~~~~~~~~~~ main.cpp:15:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] return (i < myhash[h].size()); ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void extract(int)': main.cpp:28:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < myhash[h].size() && myhash[h][i] != x) i++; ~~^~~~~~~~~~~~~~~~~~ main.cpp:29:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < myhash[h].size()){ ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:40:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ main.cpp:43:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &op, &x); ^