Compilare: main.cpp: In function 'int main()': main.cpp:25:26: warning: statement has no effect [-Wunused-value] 25 | parent[y]==parent[x]; | ~~~~~~~~~^~~~~~~~~~~ main.cpp:17:18: warning: 'n' is used uninitialized [-Wuninitialized] 17 | for(int i=1;i<=n;++i) | ~^~~ main.cpp:16:9: note: 'n' was declared here 16 | int n,m; | ^ main.cpp:19:18: warning: 'm' is used uninitialized [-Wuninitialized] 19 | for(int i=1;i<=m;++i) | ~^~~ main.cpp:16:11: note: 'm' was declared here 16 | int n,m; | ^ main.cpp:22:9: warning: 'choice' may be used uninitialized [-Wmaybe-uninitialized] 22 | if(choice==1) | ^~ main.cpp:21:17: note: 'choice' was declared here 21 | int x,y,choice; | ^~~~~~ main.cpp:29:24: warning: 'x' may be used uninitialized [-Wmaybe-uninitialized] 29 | if(parent[x]!=parent[y]) | ~~~~~~~~^ main.cpp:21:13: note: 'x' was declared here 21 | int x,y,choice; | ^ main.cpp:29:35: warning: 'y' may be used uninitialized [-Wmaybe-uninitialized] 29 | if(parent[x]!=parent[y]) | ~~~~~~~~^ main.cpp:21:15: note: 'y' was declared here 21 | int x,y,choice; | ^