Compilare: user.cpp: In function ‘void kruskal()’: user.cpp:50:9: warning: unused variable ‘i’ [-Wunused-variable] int i, nrsel = 1, adv = 0, rx, ry, nrsol = 0; ^ user.cpp: In function ‘void citire()’: user.cpp:43:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ user.cpp:45:60: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &v[i].x, &v[i].y, &v[i].cost); ^