View Compilation Error

0_0_38195169_14591.cpp: In function 'bool check(int, int, int)':
0_0_38195169_14591.cpp:52:47: error: 'i' was not declared in this scope
     if (d > 1 && (upper_bound(v[d].begin(), v[i].end(), r) -
                                               ^
0_0_38195169_14591.cpp: In function 'int main()':
0_0_38195169_14591.cpp:65:23: error: statement cannot resolve address of overloaded function
             v[i].clear;
                       ^