Compilare: main.c: In function 'main': main.c:68:18: warning: unused variable 'y' [-Wunused-variable] int N, M, x, y, i; ^ main.c:68:15: warning: unused variable 'x' [-Wunused-variable] int N, M, x, y, i; ^ main.c:69:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &N, &M); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:75:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &input[i]); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:79:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &queries[i].l, &queries[i].r); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~