/in/foo.cc: In function 'int main()':
/in/foo.cc:10:14: warning: iteration 6 invokes undefined behavior [-Waggressive-loop-optimizations]
     if(a[i][1]+a[i][2]>8&&a[i][1]+a[i][2]>max)
        ~~~~~~^
/in/foo.cc:7:14: note: within this loop
 for(int i=1;i<=7;i++)
             ~^~~
/in/foo.cc:10:22: warning: array subscript is above array bounds [-Warray-bounds]
     if(a[i][1]+a[i][2]>8&&a[i][1]+a[i][2]>max)
                ~~~~~~^