Compilare: user.c: In function ‘dfs’: user.c:17:27: warning: unused variable ‘cnt’ [-Wunused-variable] int p = lst[x], y, c, cnt = 0; ^~~ user.c:17:24: warning: variable ‘c’ set but not used [-Wunused-but-set-variable] int p = lst[x], y, c, cnt = 0; ^ user.c: In function ‘main’: user.c:36:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( fin, "%d", &n ); ^~~~~~~~~~~~~~~~~~~~~~~~ user.c:38:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( fin, "%d", &v[i] ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:40:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( fin, "%d%d", &x, &y ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~