一级标题

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*呃呃呃

$$f(x) = \sum_{i=0}^{N}\int_{a}{b} g(t,i) \text{ d}t{6}\tag{1}$$
*dsfdf
int main(){ while(cin>>n){ ans = inf; dfs(0, 1, 1); cout << ans << endl; } return 0; }