Compilare: main.c: In function 'main': main.c:138:9: warning: unused variable 'time' [-Wunused-variable] int time; ^~~~ main.c:145:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d", &nodes, &edges, &node); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:150:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d", &x[i], &y[i]); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:166:15: warning: array subscript is above array bounds [-Warray-bounds] parents[i] = -1; /*i = 0:(nodes - 1) */ ~~~~~~~^~~