View Compilation Error

0_0_36486408_28027.cpp: In function 'int main()':
0_0_36486408_28027.cpp:57:54: error: 'upper_bound' was not declared in this scope
             int pos=upper_bound(prime+1,prime+tot+1,x)-prime;
                                                      ^
0_0_36486408_28027.cpp:67:54: error: 'upper_bound' was not declared in this scope
             int pos=upper_bound(prime+1,prime+tot+1,x)-prime;
                                                      ^