/in/foo.cc: In function 'void dp()':
/in/foo.cc:26:70: warning: 'add' may be used uninitialized in this function [-Wmaybe-uninitialized]
                     f[x][i][j][k]=max(f[x-1][i-1][j][k],max(f[x-1][i][j-1][k],max(f[x-1][i][j][k-1],
                                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                     max(f[x-1][i-1][j-1][k],max(f[x-1][i-1][j][k-1],max(f[x-1][i][j-1][k-1]
                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                     ,max(f[x-1][i-1][j-1][k-1],f[x-1][i][j][k])))))))+add;
                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~