View Compilation Error

0_0_31477615_27287.cpp: In function 'int culc(int)':
0_0_31477615_27287.cpp:66:39: error: too few arguments to function 'int sum(int, int)'
     now=sum( now + (LL)_0*pre0[j]%mod );
                                       ^
0_0_31477615_27287.cpp:35:12: note: declared here
 inline int sum(int x, int y) { return x+y>=mod ? x+y-mod : x+y; }
            ^
0_0_31477615_27287.cpp:67:39: error: too few arguments to function 'int sum(int, int)'
     now=sum( now + (LL)_1*pre1[j]%mod );
                                       ^
0_0_31477615_27287.cpp:35:12: note: declared here
 inline int sum(int x, int y) { return x+y>=mod ? x+y-mod : x+y; }
            ^