Compilare: main.cpp: In function 'void read()': main.cpp:36:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(h);i++) ~^~~~~~~~~~ main.cpp:29:9: warning: unused variable 'x' [-Wunused-variable] int x,y,cost,cp; ^ main.cpp:29:11: warning: unused variable 'y' [-Wunused-variable] int x,y,cost,cp; ^ main.cpp:29:13: warning: unused variable 'cost' [-Wunused-variable] int x,y,cost,cp; ^~~~ main.cpp:29:18: warning: unused variable 'cp' [-Wunused-variable] int x,y,cost,cp; ^~ main.cpp:30:9: warning: unused variable 's' [-Wunused-variable] int s=0; ^