Compilare: user.cpp: In function ‘int main()’: user.cpp:36:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = unde; i < H[r].size() - 1; i ++) ^ user.cpp: In function ‘int caut(int, int, int, int)’: user.cpp:18:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:25:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^ user.cpp:27:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &op, &x); ^