Compilare: main.cpp: In function 'int main()': main.cpp:23:22: warning: 'ry' may be used uninitialized in this function [-Wmaybe-uninitialized] return parent[x] = Find(parent[x]); ~~~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:44:18: note: 'ry' was declared here int j = 1,rx,ry,rry; ^~