Compilare: main.c: In function 'path_cost': main.c:95:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.c: In function 'main': main.c:99:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("padure.in", "r", stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:100:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("padure.out", "w", stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:103:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d %d", &n, &m, &pl, &pc, &cl, &cc); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:107:13: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &(forest[i][j])); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~