46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
#include <bits/stdc++.h>
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using namespace std;
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const int N = 10010;
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int a[N];
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int q, cmd, number, cnt;
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long long p;
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//解法1：暴力（使用二分优化查询）
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//lower_bound(begin,end,number)函数是求begin-end中（排好序）第一个大于等于 number的数
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//upper_bound(begin,end,number)函数是求begin-end中（排好序）第一个大于 number的数
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int main() {
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//q次询问
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cin >> q;
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while (q--) {
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cin >> cmd; //1-5共5个命令
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switch (cmd) {
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case 1:
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cin >> number;
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cout << lower_bound(a + 1, a + cnt + 1, number) - a << endl;
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break;
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case 2:
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cin >> number;
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cout << a[number] << endl;
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break;
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case 3:
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cin >> number;
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p = lower_bound(a + 1, a + cnt + 1, number) - a;
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if (p == 1) cout << -2147483647 << endl;
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else cout << a[p - 1] << endl;
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break;
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case 4:
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cin >> number;
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p = upper_bound(a + 1, a + cnt + 1, number) - a;
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if (p == cnt + 1) cout << 2147483647 << endl;
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else cout << a[p] << endl;
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break;
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case 5:
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cin >> number;
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a[++cnt] = number;
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sort(a + 1, a + cnt + 1);
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break;
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}
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}
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return 0;
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} |