Compilare: main.cpp: In function 'bool check(int, int)': main.cpp:18:9: warning: unused variable 'i' [-Wunused-variable] int i,j,ok=0,x=dst[a][b]; ^ main.cpp:18:13: warning: unused variable 'ok' [-Wunused-variable] int i,j,ok=0,x=dst[a][b]; ^~ main.cpp: In function 'int main()': main.cpp:48:9: warning: unused variable 'poz' [-Wunused-variable] int poz=0,i,j,x,s=0,ok=1,l=0; ^~~ main.cpp:48:25: warning: unused variable 'ok' [-Wunused-variable] int poz=0,i,j,x,s=0,ok=1,l=0; ^~ main.cpp:48:30: warning: unused variable 'l' [-Wunused-variable] int poz=0,i,j,x,s=0,ok=1,l=0; ^ main.cpp:110:23: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] if(!mat[x+1][x]) ~~~~~~~~~~^