From a3ff0dcc60bbeab78511222efa616e16c032640d Mon Sep 17 00:00:00 2001
From: yjqiang <13307130285@fudan.edu.cn>
Date: Mon, 22 Dec 2014 01:49:56 +0800
Subject: [PATCH 1/2] 12.15

---
 13307130285/12.15/1.cpp | 88 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 13307130285/12.15/1.cpp

diff --git a/13307130285/12.15/1.cpp b/13307130285/12.15/1.cpp
new file mode 100644
index 0000000..b355780
--- /dev/null
+++ b/13307130285/12.15/1.cpp
@@ -0,0 +1,88 @@
+#include <cstdio>
+#include <iostream>
+#include <cstring>
+#include <cstdlib>
+
+using namespace std;
+
+int a[30];
+//a[letter-'A']=num
+string s[15];
+//words
+int temp;
+//first letter appear -'A'
+bool use[10];
+//true:has used
+ //false:not used yet  
+int number=0;
+long long x[15];
+int n;
+int uuuu=0;
+
+bool check()
+{
+	memset(x,0,sizeof(x));
+	int sum=0;
+	for(int k=0;k<n;k++) 
+	   if(a[s[k][0]-'A']==0)
+	      return false;
+	for(int i=0;i<n-1;i++)
+	    sum=(sum+a[s[i][s[i].length()-1]-'A'])%10;
+	if(sum!=a[s[n-1][s[n-1].length()-1]-'A'])
+	    return false;
+	for(int i=0;i<n;i++)
+	    for(unsigned int j=0;j<s[i].length();j++)  
+	       x[i]=x[i]*10+a[s[i][j]-'A'];
+	for(int i=1;i<n-1;i++)
+	     x[i]+=x[i-1];
+	if(x[n-2]==x[n-1])
+	      return true;
+	 return false;
+}
+
+void set(int p)
+{
+	if(p==30) 
+	{
+	 if(check()==true)
+	      number++;
+      return;
+	}
+	if(a[p]==-1)
+	{
+	    set(p+1);
+	}
+	else 
+	{
+	    for(int i=0;i<10;i++)
+	      if(use[i]==false )
+	        {
+				use[i]=true;
+				a[p]=i;
+				set(p+1);	
+				use[i]=false;
+	         }	
+	}
+	
+			
+}
+int main()
+{
+	cin>>n;
+	for(int i=0;i<n;i++)
+	   cin>>s[i];
+	for(int i=0;i<30;i++)
+	   a[i]=-1;
+	 for(int i=0;i<n;i++)
+	   for(unsigned int j=0;j<s[i].length();j++)
+	     a[s[i][j]-'A']=0;
+	  for(int i=0;i<30;i++)
+	     if(a[i]!=-1)
+	      {
+			  temp=i;
+			   break;
+		  }
+	  set(temp);
+	  cout << number << endl;
+	  return 0;
+}

From 72f9a8ecb229c39d076674821205f9bd5a8d97f1 Mon Sep 17 00:00:00 2001
From: yjqiang <13307130285@fudan.edu.cn>
Date: Sun, 28 Dec 2014 22:24:51 +0800
Subject: [PATCH 2/2] 12.22

---
 13307130285/12.22/1.cpp | 154 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100644 13307130285/12.22/1.cpp

diff --git a/13307130285/12.22/1.cpp b/13307130285/12.22/1.cpp
new file mode 100644
index 0000000..b494b34
--- /dev/null
+++ b/13307130285/12.22/1.cpp
@@ -0,0 +1,154 @@
+#include <iostream>
+#include <queue>
+#include <cstdio>
+#include <cstring>
+
+using namespace std;
+
+#define MAX 2000
+
+int P,T;
+//s=0
+bool a1[10005];
+//s=P-1
+int ans=0;
+bool b1[10005];
+int p1,p2,l;
+struct aaa{
+	 int num;
+	 int dis;
+	 aaa* next;
+};
+aaa *x[10005];
+
+struct node{
+  int id;
+  int w;
+  friend bool operator <(node a,node b)
+  {
+	  return a.w > b.w;
+	  
+	  } 
+}d[10005],dd[10005];
+
+//插入边
+void add(int a,int b,int c)
+{
+    aaa *address_1=new aaa;
+    address_1->num=b;
+    address_1->dis=c;
+    address_1->next=x[a];
+    x[a]=address_1;
+	aaa *address_2=new aaa;
+    address_2->num=a;
+    address_2->dis=c;
+    address_2->next=x[b];
+    x[b]=address_2;
+	return;
+}
+//dijkstra start=0
+void dijkstra_1()
+{
+		memset(a1,0,sizeof(a1));
+	priority_queue<node> q;
+	for(int i=0;i<10005;i++)
+	  {
+		d[i].id=i;  
+		d[i].w=MAX;
+	  }
+	  d[0].w=0;
+	  q.push(d[0]);
+	  while(!q.empty())
+	  {
+	     node cd=q.top();
+	     q.pop();
+	     int u=cd.id;
+	     if(a1[u]) continue;
+	     a1[u]=true;
+	     for(aaa* p=x[u];p!=NULL;p=p->next)
+	     {
+		    int v=p->num;
+		    if(!a1[v]&&d[v].w>d[u].w+p->dis)
+		    {	 
+			   d[v].w=d[u].w+p->dis;
+			   q.push(d[v]);
+		   }
+		}
+      }
+}
+
+
+//dijkstra start=P-1
+void dijkstra_2()
+{
+		memset(a1,0,sizeof(a1));
+	priority_queue<node> q;
+	for(int i=0;i<10005;i++)
+	  {
+		dd[i].id=i;  
+		dd[i].w=MAX;
+	  }
+	  dd[P-1].w=0;
+	  q.push(dd[P-1]);
+	  while(!q.empty())
+	  {
+	     node cd=q.top();
+	     q.pop();
+	     int u=cd.id;
+	     if(a1[u]) continue;
+	     a1[u]=true;
+	     for(aaa* p=x[u];p!=NULL;p=p->next)
+	     {
+		    int v=p->num;
+		    if(!a1[v]&&dd[v].w>dd[u].w+p->dis)
+		    {	 
+			   dd[v].w=dd[u].w+p->dis;
+			   q.push(dd[v]);
+		   }
+		}
+}
+}
+void	check_and_print()
+{
+    for(int i=0;i<P;i++)
+      for(aaa* p=x[i];p!=NULL;p=p->next)
+        if(p->dis+d[p->num].w+dd[i].w==d[P-1].w)
+           ans+=p->dis;
+     cout << ans*2<<endl;
+
+}
+int main()
+{
+	for(int i=0;i<10005;i++)
+	  x[i]=NULL;
+
+
+	cin>>P>>T;
+	while(T--)
+	{
+		scanf("%d%d%d",&p1,&p2,&l);
+	    add(p1,p2,l);
+	}
+	dijkstra_1();
+	dijkstra_2();
+	check_and_print();
+    return 0;	
+}
+/*
+ 10 15
+0 1 580
+1 4 90
+1 4 90
+4 9 250
+4 2 510
+2 7 600
+7 3 200
+3 3 380
+3 0 150
+0 3 100
+7 8 500
+7 9 620
+9 6 510
+6 5 145
+5 9 160
+*/