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RSS订阅转载 九度 oj 题目1548：平面上的点
http://ac.jobdu.com/problem.php?pid=1548code from http://www.lai18.com/content/477808.html#include #include #include using namespace std;#define ms(x,y) memset(x,y,sizeof(x))#define i
2017-03-13 23:01:49
415
原创 pat 1020. Tree Traversals (25)
1020. Tree Traversals (25)时间限制400 ms内存限制65536 kB代码长度限制16000 B判题程序Standard作者CHEN, YueSuppose that all the keys in a binary tree
2017-03-12 12:39:54
322
转载 pat 1043. Is It a Binary Search Tree (25)
1043. Is It a Binary Search Tree (25)时间限制400 ms内存限制65536 kB代码长度限制16000 B判题程序Standard作者CHEN, YueA Binary Search Tree (BST) is r
2017-03-09 20:20:12
326
转载 pat 1042. Shuffling Machine (20)
1042. Shuffling Machine (20)时间限制400 ms内存限制65536 kB代码长度限制16000 B判题程序Standard作者CHEN, YueShuffling is a procedure used to randomi
2017-03-09 17:47:34
233
原创 pat 1042. Shuffling Machine (20)
https://www.patest.cn/contests/pat-a-practise/1042hash 一下顺序， 然后就是dp了。#include #include using namespace std;#define rep(i,j,k) for(int i=j;i<=k;i++)#define inone(i) scanf("%d",&i)const int
2017-03-09 12:07:33
301
转载 九度 oj 题目1549：货币问题
http://ac.jobdu.com/problem.php?pid=1549参考了http://www.voidcn.com/blog/newchan/article/p-4594278.html贪心，用大面值肯定比用小面值 张数少#include #include #include using namespace std;#define ms(x,y) memset(x,
2017-03-08 23:07:47
343
转载 九度 oj 题目1550：分糖果
http://ac.jobdu.com/problem.php?pid=1550默认给最少“1”， 如果a[i] > a[i-1], 比前面多给一个。如果 a[i] 参考了http://blog.youkuaiyun.com/xiexingshishu/article/details/20319825#include #include using namespace std;#def
2017-03-08 22:35:37
318
转载 九度 oj 题目1552：座位问题
http://ac.jobdu.com/problem.php?pid=1552动归，分最后一个是男还是女讨论。注意当总共有0人以男结尾的排列是1种情况。 #include #define inone(i) scanf("%d",&i)const int maxn = 1e3 + 10;int m[maxn], f[maxn], n;void init(){ f[
2017-03-08 20:30:49
278
转载 九度 oj 题目1554：区间问题
http://ac.jobdu.com/problem.php?pid=1554copy from http://blog.youkuaiyun.com/u013491262/article/details/21406351把sum[1~i] = sum[i], sum[i] 是以a[i]为最后一个元素的前缀和， Map以前缀和为key， 具有相同的前缀和的idx的vector 为va
2017-03-08 16:15:16
336
原创 九度 oj 题目1555：重复子串
http://ac.jobdu.com/problem.php?pid=1555这道题觉得还可以再优化，暂时先水过了。#include #include #include using namespace std;#define rep(i,j,k) for(int i=j;i<=k;i++)string s;int cal(string s){ set uniq;
2017-03-08 14:39:46
364
原创 九度 oj 题目1010：A + B
http://ac.jobdu.com/problem.php?pid=1010#include #include #include #include #include using namespace std;map Map;int get(string s){ string a; istringstream is(s); int res = 0; while
2017-03-08 14:00:09
281
原创 九度 oj 题目1009：二叉搜索树
http://ac.jobdu.com/problem.php?pid=1009#include #include #include using namespace std;#define rep(i,j,k) for(int i=j;i<=k;i++)#define inone(i) scanf("%d",&i)//typedef struct nd { int v;
2017-03-08 12:36:10
326
原创 九度 oj 题目1008：最短路径问题
http://ac.jobdu.com/problem.php?pid=1008这道题告诉我们 INT_MAX, 慎用，dijkstra 有时加溢出了，你都不知道#include //#include #include using namespace std;#define rep(i,j,k) for(int i=j;i<=k;i++)#define inone(i)
2017-03-08 11:29:10
383
原创 九度 oj 题目1006：ZOJ问题
http://ac.jobdu.com/problem.php?pid=1006#include #include #include using namespace std;#define rep(i,j,k) for(int i=j;i<=k;i++)bool ac(string s){ //cout << s << endl; int len = s.size()
2017-03-08 10:05:03
274
转载 pat 1026. Table Tennis (30)
https://www.patest.cn/contests/pat-a-practise/1026根据http://blog.youkuaiyun.com/jtjy568805874/article/details/50809719 修改#include #include using namespace std;#define inthree(i,j,k) scanf("%d%d%d"
2017-03-06 13:17:06
320
转载 pat 1048. Find Coins (25)
https://www.patest.cn/contests/pat-a-practise/1048参考了http://blog.youkuaiyun.com/jtjy568805874/article/details/50858073水题，想了dp，二分。 后来看了题解才发现好简单。#include #define inone(i) scanf("%d",&i)#d
2017-03-05 21:52:02
209
原创 pat 1023. Have Fun with Numbers (20)
https://www.patest.cn/contests/pat-a-practise/1023#include #include #define rep(i,j,k) for(int i=j;i<=k;i++)const int maxn = 100;char s[maxn];int b[maxn], c[maxn], len, x;bool flag;int main(
2017-03-05 20:01:54
303
转载 pat 1021. Deepest Root (25)
https://www.patest.cn/contests/pat-a-practise/1021照抄了http://blog.youkuaiyun.com/jtjy568805874/article/details/50805402里面用到了求树的半径的方法，1）用任何一个点dfs 找到最深的深度，所有深度最深的node 是半径上的点。2）再用任意一个半径上的点dfs，找到
2017-03-05 17:40:40
290
转载 pat-top 1017. The Best Peak Shape (35)
https://www.patest.cn/contests/pat-t-practise/1017这道题首先自己写了一个O(n^2)的dp 过了。#include #include #include #include using namespace std;#define rep(i,j,k) for(int i=j;i<=k;i++)#define per(i,j
2017-03-05 15:16:09
2200
转载 pat-top 1016. Uniqueness of MST (35)
https://www.patest.cn/contests/pat-t-practise/1016照抄了 http://blog.youkuaiyun.com/jtjy568805874/article/details/60338730确定是否唯一是难点，在每新加一个边时，先看同等权值的边可否加入，并对所有可加入的边进行计数，最后如果边数小于n，不小于则最小生成树不唯一。#inc
2017-03-05 11:48:38
695
转载 pat-top 1015. Letter-moving Game (35)
https://www.patest.cn/contests/pat-t-practise/1015这道题开始想用bfs，但是状态转移和visit不好确定。看了http://blog.youkuaiyun.com/jtjy568805874/article/details/53610545，才知道用dp很简单。也是采用了逆向思维，想如何从 t 装变为 s，过程是把t的前半部分tHead
2017-03-05 10:16:17
402
原创 九度 oj 题目1171：C翻转
http://ac.jobdu.com/problem.php?pid=1171#include #include using namespace std;#define rep(i,j,k) for(int i=j;i<=k;i++)#define inone(i) scanf("%d",&i)#define infour(a,b,c,d) scanf("%d%d%d%d"
2017-03-04 17:50:16
385
原创 九度 oj 题目1073：杨辉三角形
http://ac.jobdu.com/problem.php?pid=1073#include #include #define inone(i) scanf("%d",&i)#define rep(i,j,k) for(int i=j;i<=k;i++)const int maxn = 1e6;int n;int dp[2][maxn];int get(int i,
2017-03-04 15:23:56
280
原创 九度 oj 题目1072：有多少不同的面值组合？
http://ac.jobdu.com/problem.php?pid=1072#include const int n = 15;const int v = 8 * 5 + 10 * 4 + 18 * 6;const int a[n+1] = { 0,8,8,8,8,8,10,10,10,10,18,18,18,18,18,18 };#define rep(i,j,k) fo
2017-03-04 14:43:40
288
转载 pat-top 1014. Circles of Friends (35)
https://www.patest.cn/contests/pat-t-practise/1014照抄了http://blog.youkuaiyun.com/jtjy568805874/article/details/53610228这道题开始时想用并查集，但是如何计算半径很复杂。解题思路：对每个节点进行bsf得到最大半径（所有bfs得最大深度）， 然后bfs可以得到最大团（
2017-03-04 14:23:30
474
转载 pat-top 1013. Image Segmentation (35)
https://www.patest.cn/contests/pat-t-practise/1013这道题自己的想法是 算出一个个mst，然后看每个MST的最长边是否可以分解。 但是没想出好的dfs模型后来看了http://blog.youkuaiyun.com/jtjy568805874/article/details/53435235，逆向思维，从搭建compoent的角度出发。去填边，正
2017-03-03 21:14:49
2398
转载 pat-top 1012. Greedy Snake (35)
https://www.patest.cn/contests/pat-t-practise/1012参考了http://blog.youkuaiyun.com/jtjy568805874/article/details/52517821#include #include #include #include using namespace std;const int ma
2017-03-03 17:27:17
547
转载 pat-top 1010. Lehmer Code (35)
https://www.patest.cn/contests/pat-t-practise/1010离散化+树状数组code from http://blog.youkuaiyun.com/jtjy568805874/article/details/50898105#include #include using namespace std;const int max
2017-03-03 11:48:06
307
原创 树状数组
参考了http://baike.baidu.com/item/%E6%A0%91%E7%8A%B6%E6%95%B0%E7%BB%84原数组：a[], 树状数组：c[];1.最重要的概念：c[n] = a[n] + a[n-1] + a[n-2] +...+ a[n-2^k-1]. k是n的二进制末尾0的个数。 c[n] 的物理意义是从n到n的二进制下最后一个1所覆盖的
2017-03-03 10:44:42
187
转载 pat-top 1009. Triple Inversions (35)
https://www.patest.cn/contests/pat-t-practise/1009这道题首先用了一个简单的dp：const int maxn = 1e5 + 2;int lar[maxn];int a[maxn];int main(){ int n, k, ans = 0; scanf("%d", &n); for (int i = 0; i <
2017-03-03 09:36:03
315
转载 pat-top 1008. Airline Routes (35)
https://www.patest.cn/contests/pat-t-practise/1008参考了https://zh.wikipedia.org/wiki/Tarjan%E7%AE%97%E6%B3%95code 来自于http://blog.youkuaiyun.com/jtjy568805874/article/details/50759540题意是求在有向图中的两个点是否在
2017-03-02 15:25:11
491
转载 pat-top 1006. Tree Traversals - Hard Version (35)
https://www.patest.cn/contests/pat-t-practise/1006code 来自于http://blog.youkuaiyun.com/jtjy568805874/article/details/50759512dfs 在中序遍历序列中穷举 root 的位置，因为root可能会被替换，所以使用数组存储树。#include #include #i
2017-03-01 21:39:08
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原创 pat 1016. Phone Bills (25)
https://www.patest.cn/contests/pat-a-practise/1016#include #include #include #include #include #include #define _CRT_SECURE_NO_WARNINGSusing namespace std;typedef struct item { int typ
2017-03-01 13:29:05
243
原创 九度oj 题目1457：非常可乐
http://ac.jobdu.com/problem.php?pid=1457#include #include #include #include using namespace std;bool visit[101][101][101];int n, m, s;typedef struct status { int a,b,c; int steps; void
2017-02-28 22:05:31
498
转载 pat 1040. Longest Symmetric String (25)
https://www.patest.cn/contests/pat-a-practise/1040参考了：https://segmentfault.com/a/1190000003914228http://blog.youkuaiyun.com/jtjy568805874/article/details/50856440#include #include #inc
2017-02-27 17:07:13
210
转载 pat 1013. Battle Over Cities (25)
https://www.patest.cn/contests/pat-a-practise/1013代码来自http://blog.youkuaiyun.com/jtjy568805874/article/details/50791941#include #include #include using namespace std;typedef struct edge { i
2017-02-27 10:33:22
192
原创 pat 1012. The Best Rank (25)
https://www.patest.cn/contests/pat-a-practise/1012使用基数排序部分代码参考了：http://blog.youkuaiyun.com/jtjy568805874/article/details/50782867#include int wc[4][102];int ids[1000001];int scor[2001][4]
2017-02-27 09:52:43
248
转载 pat 1011 1011. World Cup Betting (20)
https://www.patest.cn/contests/pat-a-practise/1011代码来自 http://blog.youkuaiyun.com/jtjy568805874/article/details/50782588#include #include using namespace std;double x, y, z, ans = 1;int mai
2017-02-27 08:34:45
195
转载 pat 1010. Radix (25)
https://www.patest.cn/contests/pat-a-practise/1010代码来自http://blog.youkuaiyun.com/jtjy568805874/article/details/50782565#include #include #include using namespace std;typedef unsigned long l
2017-02-27 08:17:56
347
原创 pat 1007. Maximum Subsequence Sum (25)
https://www.patest.cn/contests/pat-a-practise/1007#include #include int main(){ int a[10000],n,maxSum=INT_MIN,maxBegin,maxEnd=0,sum=INT_MIN,begin = 0; scanf("%d", &n); for (int i = 0; i
2017-02-25 11:56:24
182
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