View Compilation Error

0_0_38661778_6486.cpp: In function 'void update1(long long int)':
0_0_38661778_6486.cpp:20:9: error: 'min' was not declared in this scope
  mn1[k]=min(mn1[k<<1],mn1[k<<1|1]);
         ^~~
0_0_38661778_6486.cpp:20:9: note: suggested alternative:
In file included from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/algorithm:62,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/x86_64-w64-mingw32/bits/stdc++.h:65,
                 from 0_0_38661778_6486.cpp:1:
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/bits/stl_algo.h:3456:5: note:   'std::min'
     min(initializer_list<_Tp> __l, _Compare __comp)
     ^~~