View Compilation Error

0_0_35082256_24145.cpp: In function 'int main()':
0_0_35082256_24145.cpp:19:9: error: 'function' was not declared in this scope
         function<bool(int)> dfs = [&](int node) {
         ^
0_0_35082256_24145.cpp:19:18: error: expected primary-expression before 'bool'
         function<bool(int)> dfs = [&](int node) {
                  ^
0_0_35082256_24145.cpp:31:14: error: 'dfs' was not declared in this scope
         dfs(1);
              ^