二(A了) 思路 差分数组 代码 #include<iostream> #include <vector> using namespace std; const int MAX = 100000; int main() { int n, h, l, r, cnt = 0, end = 0; cin >> n >> h; vector<int> df(MAX, 0); for (int i = 1; i <= n; ++i) { cin >> l >> ...