Compilare: main.cpp: In function 'int main()': main.cpp:83:23: warning: iteration 2 invokes undefined behavior [-Waggressive-loop-optimizations] if(v[k]!=v[k+1]) ~~~~~^ main.cpp:82:22: note: within this loop for(int k=0;k<=2;k++) ~^~~ main.cpp:66:8: warning: array subscript is above array bounds [-Warray-bounds] v[3]=a[i][j+1]; ~~~^ main.cpp:68:41: warning: array subscript is above array bounds [-Warray-bounds] if(v[0]!=v[1] && v[1]!=v[2] && v[2]!=v[3]) ~~~^ main.cpp:74:35: warning: array subscript is above array bounds [-Warray-bounds] if(v[1]!=v[2] && v[2]!=v[3]) ~~~^ main.cpp:77:39: warning: array subscript is above array bounds [-Warray-bounds] if(v[0]==v[1] && v[1]==v[2] && v[3]==v[2]) ~~~^