A. Cottage Village
2016-04-21 19:02
239 查看
A. Cottage Villagetime limit per test2 secondsmemory limit per test64 megabytesinputstandard inputoutputstandard outputA new cottage village called ?Flatville? is being built in Flatland. By now they have already built in ?Flatville? n square houses with the centres on the Оx-axis. The houses' sides are parallel to the coordinate axes. It's known that no two houses overlap, but they can touch each other.The architect bureau, where Peter works, was commissioned to build a new house in ?Flatville?. The customer wants his future house to be on the Оx-axis, to be square in shape, have a side t, and touch at least one of the already built houses. For sure, its sides should be parallel to the coordinate axes, its centre should be on the Ox-axis and it shouldn't overlap any of the houses in the village.Peter was given a list of all the houses in ?Flatville?. Would you help him find the amount of possible positions of the new house?InputThe first line of the input data contains numbers n and t (1?≤?n,?t?≤?1000). Then there follow n lines, each of them contains two space-separated integer numbers: xi ai, where xi — x-coordinate of the centre of the i-th house, and ai — length of its side (?-?1000?≤?xi?≤?1000, 1?≤?ai?≤?1000).OutputOutput the amount of possible positions of the new house.Sample test(s)input
2 2 0 4 6 2output
4input
2 20 45 2output
3input
2 30 45 2output
2NoteIt is possible for the x-coordinate of the new house to have non-integer value.两种情况 区间内能放一个或者两个
/* *********************************************** Author : Created Time :2015/6/9 15:48:29 File Name :6.cpp ************************************************ */ #include <iostream> #include <cstring> #include <cstdlib> #include <stdio.h> #include <algorithm> #include <vector> #include <queue> #include <set> #include <map> #include <string> #include <math.h> #include <stdlib.h> #include <iomanip> #include <list> #include <deque> #include <stack> #define ull unsigned long long #define ll long long #define mod 90001 #define INF 1<<30 #define maxn 10000+10 #define cle(a) memset(a,0,sizeof(a)) const ull inf = 1LL << 61; const double eps=1e-5; using namespace std; bool cmp(int a,int b){ return a>b; } pair<double,double>p[maxn]; int main() { #ifndef ONLINE_JUDGE //freopen("in.txt","r",stdin); #endif //freopen("out.txt","w",stdout); int n,t; while(cin>>n>>t){ for(int i=0;i<n;i++){ cin>>p[i].first>>p[i].second; } sort(p,p+n); int ans=2; //1 1 1 1 for(int i=1;i<n;i++){ if(p[i].first-p[i].second*1.0/2-p[i-1].first-p[i-1].second*1.0/2==t) ans++; else if(p[i].first-p[i].second*1.0/2-p[i-1].first-p[i-1].second*1.0/2>t){ ans+=2; } } cout<<ans<<endl; } return 0; }
相关文章推荐
- A. Letter
- A. Numbers
- A. Super Agent
- A. Increasing Sequence
- A. Power Consumption Calculation
- 【问题解决】FragmentTabHost 底部菜单栏,切换Frgment时重新加载问题
- 使用Ajax实现异步用户名验证
- hiho#1139 : 二分·二分答案
- A. Die Roll
- 错排公式
- Crontab配置及使用总结
- Oracle内置表二
- CalendarView功能与用法(日历视图)
- 报名|「OneAPM x DaoCloud」技术公开课:Docker性能监控!
- Friday the Thirteenth
- DINIC 模板
- Greedy Gift Givers
- Activity之封装intent
- 2015年06月17日
- HDU 1215七夕节