Compilare: main.cpp: In function 'int main()': main.cpp:78:21: warning: unused variable 'OK' [-Wunused-variable] int OK=0; ^~ main.cpp:102:68: warning: array subscript is above array bounds [-Warray-bounds] fout<<a[1].i1<<" "<<b[1]<<" "<<a[1].i1<<" "<<b[2]<<"\n"; ^~~~ main.cpp:105:29: warning: array subscript is above array bounds [-Warray-bounds] m=y-v[0][b[2]]+v[a[1].i1][b[2]]; ~~~^ main.cpp:110:51: warning: array subscript is above array bounds [-Warray-bounds] fout<<a[1].i1<<" "<<b[1]<<" "<<a[2].i1<<" "<<b[1]<<"\n"; ~~~^ main.cpp:113:26: warning: array subscript is above array bounds [-Warray-bounds] m=y-v[a[2].i1][0]+v[a[2].i1][b[1]]; ~~~^ main.cpp:58:9: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] if (v[i][0]!=y) ^~