Compilare: user.cpp: In function ‘void delet(int)’: user.cpp:40:6: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (j != has[i].end() ) ^ user.cpp: In function ‘int main()’: user.cpp:62:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d%d", &n, &l, &u ) ; ^ user.cpp:64:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &v[i] ) ; ^