/in/foo.cc: In function 'int main()':
/in/foo.cc:40:65: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
                     dp[k&1][i][j][1]=(dp[k&1][i-1][j-1][1]+(dp[k-1&1][i-1][j-1][0]+dp[k-1&1][i-1][j-1][1])%mod)%mod;
                                                                ~^~
/in/foo.cc:40:88: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
                     dp[k&1][i][j][1]=(dp[k&1][i-1][j-1][1]+(dp[k-1&1][i-1][j-1][0]+dp[k-1&1][i-1][j-1][1])%mod)%mod;
                                                                                       ~^~