Description

我们常常会说这样的话:“X年是自Y年以来降雨量最多的”。它的含义是X年的降雨量不超过Y年,且对于任意Y<Z<X,Z年的降雨量严格小于X年。例如2002,2003,2004和2005年的降雨量分别为4920,5901,2832和3890,则可以说“2005年是自2003年以来最多的”,但不能说“2005年是自2002年以来最多的”由于有些年份的降雨量未知,有的说法是可能正确也可以不正确的。

Solution

抱歉在下实在是读不懂题目.

降雨量:

-3951 1990
-3941 2156

查询

-3951 -3941

应该输出啥?

maybe或者是false?????

Code

#include <stdio.h>
#include <string.h>
#include <iostream>
#include <algorithm>
// #define int long long
struct Node {
int mx, isfull; Node *ls, *rs;
Node(int _ = 0, int __ = 0, Node *_ls = nullptr, Node *_rs = nullptr) :
mx(_), isfull(__), ls(_ls), rs(_rs) { }
void PushUp() {
mx = std:: max(ls ? ls->mx : 0, rs ? rs->mx : 0);
isfull = (ls ? ls->isfull : 0) bitand (rs ? rs->isfull : 0);
}
void init(int p) {
mx = p, isfull = true;
}
void merge(Node o) {
mx = std:: max(mx, o.mx), isfull = isfull bitand o.isfull;
}
};
class Tree {
int n, lim;
Node *root;
#define LS l, mid, node->ls
#define RS mid + 1, r, node->rs
void insert(int l, int r, Node* node, const int& p, const int& k) {
if (l == r) {
return node->init(k);
}
int mid = ((long long)l + r) >> 1ll;
if (p <= mid) {
if (not node->ls) node->ls = new Node();
insert(LS, p, k);
}
if (p > mid) {
if (not node->rs) node->rs = new Node();
insert(RS, p, k);
}
node->PushUp();
}
Node query(int l, int r, Node* node, const int& L, const int& R) {
if (l >= L and r <= R) return *node;
int mid = ((long long)l + r) >> 1ll;
Node res = Node(0, 1);
if (L <= mid) res.merge(node->ls ? query(LS, L, R) : Node(0, 0));
if (R > mid) res.merge(node->rs ? query(RS, L, R) : Node(0, 0));
return res;
}
int query(int l, int r, Node* node, const int& p) {
if (l == r) return node->mx;
int mid = ((long long)l + r) >> 1ll;
if (p <= mid) return node->ls ? query(LS, p) : -1;
if (p > mid) return node->rs ? query(RS, p) : -1;
}
#undef LS
#undef RS
public:
Tree(int _n) : n(_n), root(new Node()), lim(0) {}
void insert(int p, int k) {
// printf("insert: %d %d\n", p, k);
lim = std:: max(lim, p);
return insert(1, n, root, p, k);
}
inline Node query(int l, int r) {
if (l > r) return false;
// printf("query: %d %d\n", l, r);
return query(1, n, root, l, r);
}
int solution(int k, int p) {
int val = query(1, n, root, p);
// printf("val : %d %d\n", p, val);
if (val == -1) return -1;
Node res = query(k + 1, p - 1);
return val < res.mx ? false : (res.isfull ? true : -1);
}
};
const int Delta = 1e8 + 1;
void test();
signed main () {
// test();
int n;
scanf("%lld", &n);
Tree* T = new Tree(1e9 + 1);
for (int i = 0, y, r; i < n; i += 1) {
scanf("%lld%lld", &y, &r);
T->insert(y + Delta, r);
}
int m;
scanf("%lld", &m);
for (int i = 0, y, r; i < m; i += 1) {
scanf("%lld%lld", &y, &r);
int res = T->solution(y + Delta, r + Delta);
printf("%s\n", ~res ? (res ? "true" : "false") : "maybe");
}
return 0;
} void test() {
freopen("1.in", "r", stdin);
freopen("1.out", "w", stdout);
}
05-11 16:11