Codeforces475D-CGCDSSQ
来源:互联网 发布:nginx反向代理好处 编辑:程序博客网 时间:2024/06/08 11:11
Given a sequence of integers a1, ..., an and q queries x1, ..., xq on it. For each query xi you have to count the number of pairs (l, r)such that 1 ≤ l ≤ r ≤ n and gcd(al, al + 1, ..., ar) = xi.
is a greatest common divisor of v1, v2, ..., vn, that is equal to a largest positive integer that divides all vi.
The first line of the input contains integer n, (1 ≤ n ≤ 105), denoting the length of the sequence. The next line contains n space separated integers a1, ..., an, (1 ≤ ai ≤ 109).
The third line of the input contains integer q, (1 ≤ q ≤ 3 × 105), denoting the number of queries. Then follows q lines, each contain an integer xi, (1 ≤ xi ≤ 109).
For each query print the result in a separate line.
32 6 3512346
12201
710 20 3 15 1000 60 16101234561020601000
14022202211
题意:给你有n个数的序列,有m次询问,求出有多少个区间的gcd为这个值
解题思路:可以先预处理出所有区间gcd的值,对于每次询问直接输出
#include <iostream>#include <cstdio>#include <cstring>#include <string>#include <algorithm>#include <cmath>#include <map>#include <set>#include <stack>#include <queue>#include <vector>#include <bitset>#include <functional>using namespace std;#define LL long longconst int INF = 0x3f3f3f3f;int n, m, x;map<int, LL>mp;int gcd(int x, int y){return x ? gcd(y%x, x) : y;}int main(){while (~scanf("%d", &n)){mp.clear();stack<pair<int, LL> >s1, s2;for (int i = 1; i <= n; i++){scanf("%d", &x);s1.push(make_pair(x, 1));while (!s1.empty()) s2.push(make_pair(gcd(s1.top().first, x), s1.top().second)), s1.pop();while (!s2.empty()){pair<int, LL>pre = s2.top(); s2.pop();mp[pre.first] += pre.second;if (!s1.empty() && pre.first == s1.top().first) pre.second += s1.top().second, s1.pop();s1.push(pre);}}scanf("%d", &m);while (m--){scanf("%d", &x);printf("%lld\n", mp[x]);}}return 0;}
- Codeforces475D-CGCDSSQ
- codeforces475D——CGCDSSQ
- [题解]codeforces475d CGCDSSQ
- [Codeforces475D]CGCDSSQ(数学相关+二分)
- CF475D. CGCDSSQ
- 【codeforces】 475D CGCDSSQ
- Codeforce P471D CGCDSSQ
- rmq cf CGCDSSQ
- Codeforces 475 D. CGCDSSQ
- CodeForces 475D CGCDSSQ
- 【CODEFORCES】 D. CGCDSSQ
- CodeForces 475D CGCDSSQ
- Codeforces457-D. CGCDSSQ
- CodeForces 475D CGCDSSQ RMQ
- Codeforces 475D CGCDSSQ 题解
- CF - 475 - D. CGCDSSQ(枚举)
- codeforces 475D CGCDSSQ ST表+二分
- CF 475D CGCDSSQ 枚举,思维+gcd
- 蓝牙HCI剖析(一)
- 联系我们
- ExtJS加载不到JSON数据的问题(转义字符)
- Android下拉刷新库使用
- 理解maven的核心概念
- Codeforces475D-CGCDSSQ
- jsp页面中EL表达式原样输出问题
- HEVC学习(五) —— 帧内预测系列之三
- [Lucas+数位DP] 2015 计蒜之道 复赛 C. 360的产品试用体验
- codevs2596售货员难题——状态压缩dp
- 从零开始学习OpenCL开发(一)架构
- java核心技术卷 之捕获异常
- 等差数列
- CentOS7配置Tomcat9.0常见问题