Compilare: main.cpp: In function 'void readFile()': main.cpp:77:12: warning: unused variable 'j' [-Wunused-variable] int i, j; ^ main.cpp: In function 'bool pos(int)': main.cpp:225:13: warning: unused variable 'p' [-Wunused-variable] int p, u; ^ main.cpp:225:16: warning: unused variable 'u' [-Wunused-variable] int p, u; ^ main.cpp: In function 'void build()': main.cpp:361:9: warning: unused variable 'nod' [-Wunused-variable] int nod = 0; ^~~ main.cpp:363:9: warning: unused variable 'p2' [-Wunused-variable] int p2=0; ^~ main.cpp: In function 'int main()': main.cpp:511:27: warning: suggest parentheses around assignment used as truth value [-Wparentheses] viz[i] = que[i] = 0; ^