Compilare: user.cpp: In function ‘bool cmp(int, int)’: user.cpp:42:53: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] return (val1[a] < val1[b] || val1[a] == val1[b] && val2[a] > val2[b]); ^ user.cpp: In function ‘int main()’: user.cpp:49:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d\n", &K); ^ user.cpp:50:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%s", ch); ^