/in/foo.cc: In function 'int kruskal1()':
/in/foo.cc:24:13: warning: unused variable 'x' [-Wunused-variable]
         int x=e[i].x,y=e[i].y;
             ^
/in/foo.cc:24:22: warning: unused variable 'y' [-Wunused-variable]
         int x=e[i].x,y=e[i].y;
                      ^
/in/foo.cc: In function 'int kruskal2()':
/in/foo.cc:48:13: warning: unused variable 'x' [-Wunused-variable]
         int x=e[i].x,y=e[i].y;
             ^
/in/foo.cc:48:22: warning: unused variable 'y' [-Wunused-variable]
         int x=e[i].x,y=e[i].y;
                      ^