Compilare: main.cpp: In function 'void read()': main.cpp:38:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<strlen(h);j++) ~^~~~~~~~~~ main.cpp:32:9: warning: unused variable 'x' [-Wunused-variable] int x,y,cost,cp; ^ main.cpp:32:11: warning: unused variable 'y' [-Wunused-variable] int x,y,cost,cp; ^ main.cpp:32:13: warning: unused variable 'cost' [-Wunused-variable] int x,y,cost,cp; ^~~~ main.cpp:32:18: warning: unused variable 'cp' [-Wunused-variable] int x,y,cost,cp; ^~ main.cpp:33:9: warning: unused variable 's' [-Wunused-variable] int s=0; ^