Compilare: main.cpp: In function 'bool isOk(int)': main.cpp:14:17: warning: statement has no effect [-Wunused-value] for (st ; st < dr ; ++ st) { ^ main.cpp: In function 'int getSum(int)': main.cpp:39:17: warning: statement has no effect [-Wunused-value] for (st ; st < dr ; ++ st) { ^ main.cpp: In function 'int main()': main.cpp:63:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &n, &k) ; ^ main.cpp:66:52: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d\n", population + i) ; ^