Compilare: main.cpp: In function 'int main()': main.cpp:13:13: warning: unused variable 'a' [-Wunused-variable] int n,m,a,b,c,i,j,x,k=0; ^ main.cpp:13:15: warning: unused variable 'b' [-Wunused-variable] int n,m,a,b,c,i,j,x,k=0; ^ main.cpp:13:17: warning: unused variable 'c' [-Wunused-variable] int n,m,a,b,c,i,j,x,k=0; ^ main.cpp:30:9: warning: unused variable 'minim' [-Wunused-variable] int minim=0; ^~~~~