/in/foo.cc: In function 'void solve()':
/in/foo.cc:43:31: warning: operation on 'dp[j][(t - j)]' may be undefined [-Wsequence-point]
                     dp[j][t-j]=max(dp[j][t-j-1]+arr[i][m-t+j+1]*t1,dp[j][t-j]=dp[j-1][t-j]+arr[i][j]*t1);
                     ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~