P2343 宝石管理系统
不会写平衡树怎么办，可以用STL的vector或者是pb_ds，这个东西太乱，还是STL好用
#include<bits/stdc++.h>
using namespace std;
int read() {int x = 0, f = 1;char ch = getchar();while (ch < '0' || ch > '9') {if (ch == '-') f = -1;ch = getchar();}while (ch >= '0' && ch <= '9') x = x * 10 + ch - '0', ch = getchar();return x * f;
}
void write(int x) {if (x < 0) putchar('-'), x = -x;if (x > 9) write(x / 10);putchar(x % 10 + '0');
}
void ot(int x) {write(x), puts("");
}
vector<int > s;
int n, m;
int main() {n = read(), m = read();for (int i = 1; i <= n; i++) {int a = read();s.insert(lower_bound(s.begin(), s.end(), a), a);}for (int i = 1; i <= m; i++) {int op = read(), x = read();if (op == 1) ot(s[s.size() - x]);else s.insert(lower_bound(s.begin(), s.end(), x), x);}return 0;
}STL好