View Compilation Error

0_0_23727354_3467.cpp: In function 'bool calc(int)':
0_0_23727354_3467.cpp:28:49: error: 'op' was not declared in this scope
   if (i1<=N && (i2>M || E1[i1].v+V<E2[i2].v || (op && k<K && E1[i1].v+V==E2[i2].v && V>0)))
                                                 ^
0_0_23727354_3467.cpp: In function 'void work()':
0_0_23727354_3467.cpp:43:12: error: too many arguments to function 'bool calc(int)'
  calc(R+1,1); printf("%d\n",s);
            ^
0_0_23727354_3467.cpp:20:6: note: declared here
 bool calc(int V){
      ^