Compilare: main.cpp: In function 'void Union(int, int, int, int)': main.cpp:31:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(s[a.x][a.y]>s[b.x][b.y]) ^~ main.cpp:33:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' father[a.x][a.y]=b; ^~~~~~