/in/foo.cc: In function 'int main()':
/in/foo.cc:50:12: warning: iteration 99999 invokes undefined behavior [-Waggressive-loop-optimizations]
    dp[i][j]=max(dp[i-1][j],dp[i-1][j-a[i]]+b[i]);
    ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:48:16: note: within this loop
   for(int j=1;j<=100000;j++)
               ~^~~~~~~~
/in/foo.cc:56:20: warning: array subscript is above array bounds [-Warray-bounds]
  cout<<dp[n][100000];
                    ^