Compilare: main.cpp: In function 'void cant(char*, int, int&)': main.cpp:51:20: warning: unused variable 'k' [-Wunused-variable] int i,j=0,ok=0,k,t=0; ^ main.cpp: In function 'int main()': main.cpp:85:17: warning: unused variable 'x' [-Wunused-variable] int n,i,j=0,x,y,sol=0,t=0,m; ^ main.cpp:85:19: warning: unused variable 'y' [-Wunused-variable] int n,i,j=0,x,y,sol=0,t=0,m; ^