0_0_37830636_10427.cpp: In function 'int main()':
0_0_37830636_10427.cpp:30:5: error: 'function' was not declared in this scope
function <void(int)> dfs = [&](int x) {
^
0_0_37830636_10427.cpp:30:15: error: expected primary-expression before 'void'
function <void(int)> dfs = [&](int x) {
^
0_0_37830636_10427.cpp:43:10: error: 'dfs' was not declared in this scope
dfs(m), ans = 0;
^
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