Compilare: user.cpp: In function ‘int main()’: user.cpp:60:18: warning: unused variable ‘tx’ [-Wunused-variable] int i, x, y, tx, ty; ^ user.cpp:60:22: warning: unused variable ‘ty’ [-Wunused-variable] int i, x, y, tx, ty; ^ user.cpp: In function ‘int rmq(int, int, int)’: user.cpp:56:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:65:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &n, &m); ^ user.cpp:67:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i]); ^ user.cpp:72:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &x, &y); ^