Compilare: user.cpp: In function ‘bool cmp(Update, Update)’: user.cpp:32:61: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] bool cmp(Update A, Update B){return A.x < B.x || A.x == B.x && A.val < B.val;} ^ user.cpp: In function ‘int main()’: user.cpp:65:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &n, &c); ^ user.cpp:66:81: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i = 1; i <= n; i++) fscanf(fi,"%d%d", &x, &y), v[i] = {x + y, x - y}; ^