首页 > 代码库 > HDU2665 Kth number 【归并树】
HDU2665 Kth number 【归并树】
Kth number
Time Limit: 15000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 5425 Accepted Submission(s): 1760
Problem Description
Give you a sequence and ask you the kth big number of a inteval.
Input
The first line is the number of the test cases.
For each test case, the first line contain two integer n and m (n, m <= 100000), indicates the number of integers in the sequence and the number of the quaere.
The second line contains n integers, describe the sequence.
Each of following m lines contains three integers s, t, k.
[s, t] indicates the interval and k indicates the kth big number in interval [s, t]
For each test case, the first line contain two integer n and m (n, m <= 100000), indicates the number of integers in the sequence and the number of the quaere.
The second line contains n integers, describe the sequence.
Each of following m lines contains three integers s, t, k.
[s, t] indicates the interval and k indicates the kth big number in interval [s, t]
Output
For each test case, output m lines. Each line contains the kth big number.
Sample Input
1 10 1 1 4 2 3 5 6 7 8 9 0 1 3 2
Sample Output
2
Source
HDU男生专场公开赛——赶在女生之前先过节(From WHU)
Recommend
zty | We have carefully selected several similar problems for you: 2660 2662 2667 2663 2661
跟POJ2104一样。
#include <stdio.h> #include <string.h> #include <algorithm> #include <vector> #define maxn 100005 #define lson l, mid, rt << 1 #define rson mid + 1, r, rt << 1 | 1 using namespace std; vector<int> T[maxn << 2]; int N, Q; void build(int l, int r, int rt) { if(l == r) { int val; scanf("%d", &val); T[rt].clear(); T[rt].push_back(val); return; } int mid = (l + r) >> 1; build(lson); build(rson); T[rt].resize(r - l + 1); // Attention merge(T[rt<<1].begin(), T[rt<<1].end(), T[rt<<1|1].begin(), T[rt<<1|1].end(), T[rt].begin()); } int query(int L, int R, int val, int l, int r, int rt) { if(L == l && R == r) { return upper_bound(T[rt].begin(), T[rt].end(), val) - T[rt].begin(); } int mid = (l + r) >> 1; if(R <= mid) return query(L, R, val, lson); else if(L > mid) return query(L, R, val, rson); return query(L, mid, val, lson) + query(mid + 1, R, val, rson); } int main() { int a, b, c, k, left, right, mid, t; scanf("%d", &t); while(t--) { scanf("%d%d", &N, &Q); build(1, N, 1); while(Q--) { scanf("%d%d%d", &a, &b, &k); left = -1; right = N - 1; while(right - left > 1) { // binary search mid = (left + right) >> 1; c = query(a, b, T[1][mid], 1, N, 1); if(c >= k) right = mid; else left = mid; } printf("%d\n", T[1][right]); } } return 0; }
HDU2665 Kth number 【归并树】
声明:以上内容来自用户投稿及互联网公开渠道收集整理发布,本网站不拥有所有权,未作人工编辑处理,也不承担相关法律责任,若内容有误或涉及侵权可进行投诉: 投诉/举报 工作人员会在5个工作日内联系你,一经查实,本站将立刻删除涉嫌侵权内容。