diff --git a/POJ/2431.cpp b/POJ/2431.cpp
new file mode 100644
index 0000000..d227d33
--- /dev/null
+++ b/POJ/2431.cpp
@@ -0,0 +1,134 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <vector>
+#include <queue>
+#include <map>
+#include <algorithm>
+using namespace std;
+
+#define MAX_N 10000
+
+int L,P,N;
+
+pair<int,int> X[MAX_N+1];
+
+struct _A
+{
+public:
+    int& operator [] (int x)
+    {
+        return X[x].first;
+    }
+}A;
+
+struct B
+{
+public:
+    int& operator [] (int x)
+    {
+        return X[x].second;
+    }
+}B;
+
+void solve()
+{
+    A[N]=L;
+    B[N]=0;
+    N++;
+
+    priority_queue<int> bus;
+
+    int ans=0,pos=0,tank=P;
+
+    for(int i=0;i<N;i++)
+    {
+        int d=A[i]-pos;
+
+        while(tank-d<0)
+        {
+            if(bus.empty())
+            {
+                printf("-1\n");
+                return;
+            }
+
+            tank+=bus.top();
+            bus.pop();
+
+            ++ans;
+        }
+
+        tank-=d;
+        pos=A[i];
+        bus.push(B[i]);
+    }
+
+    printf("%d\n",ans);
+}
+
+int main()
+{
+    scanf("%d",&N);
+    for(int i=0;i<N;i++)
+    {
+        scanf("%d %d",&A[i],&B[i]);
+    }
+    scanf("%d %d",&L,&P);
+
+    for(int i=0;i<N;i++)
+    {
+        A[i]=L-A[i];
+    }
+
+    sort(X,X+N);
+
+    solve();
+}
+
+/*
+
+int main()
+{
+    int n;
+    scanf("%d",&n);
+    vector< pair<int,int> > vec;
+    for(int i=0;i<n;i++)
+    {
+        int a,b;
+        scanf("%d %d",&a,&b);
+        vec.push_back(make_pair(a,b));
+    }
+    int L,P;
+    scanf("%d %d",&L,&P);
+    priority_queue<int> bus;
+    int cnt=0;
+    int now=0;
+    int fuel=P;
+    for(int i=0;i<n;i++)
+    {
+        int nextLength=L-vec[i].first-now;
+        while(fuel-nextLength<0)
+        {
+            if(bus.empty())
+            {
+                /// Can not reach
+                printf("-1\n");
+                return 0;
+            }
+
+            fuel+=bus.top();
+            bus.pop();
+            ++cnt;
+        }
+
+        fuel=fuel-nextLength;
+        now=L-vec[i].first;
+        bus.push(vec[i].second);
+    }
+
+    printf("%d\n",cnt);
+    return 0;
+}
+
+//*/
diff --git a/UVA/100.cpp b/UVA/100.cpp
new file mode 100644
index 0000000..1fd1fff
--- /dev/null
+++ b/UVA/100.cpp
@@ -0,0 +1,37 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <algorithm>
+using namespace std;
+
+int main()
+{
+    int l,r;
+    while(scanf("%d %d",&l,&r)==2)
+    {
+        /// Naive! What assume l < r?
+        int ll=min(l,r);
+        int rr=max(l,r);
+
+        /// F^K. Why the problem does not show the REAL range?
+        int maxcnt=-1;
+
+        for(int i=ll;i<=rr;i++)
+        {
+            long long c=i;
+            int cnt=1;
+            while(c!=1)
+            {
+                if(c&1) c=c*3+1;
+                else c=c/2;
+
+                ++cnt;
+            }
+
+            maxcnt=max(maxcnt,cnt);
+        }
+
+        printf("%d %d %d\n",l,r,maxcnt);
+    }
+    return 0;
+}
diff --git a/UVA/10033.cpp b/UVA/10033.cpp
new file mode 100644
index 0000000..534202e
--- /dev/null
+++ b/UVA/10033.cpp
@@ -0,0 +1,90 @@
+#include <iostream>
+#include <cstdlib>
+#include <cstring>
+#include <string>
+#include <algorithm>
+using namespace std;
+
+int reg[10];
+
+int mem[1000];
+
+int main()
+{
+    int t;
+    scanf("%d%*c%*c",&t);
+
+    while(t--)
+    {
+        memset(reg,0,sizeof(reg));
+        memset(mem,0,sizeof(mem));
+
+        /// Read code
+        int cc=0;
+        while(1)
+        {
+            string buff;
+            if(!getline(cin,buff)) break;
+
+            if(buff.size()>1)
+            {
+                sscanf(buff.c_str(),"%d",&mem[cc]);
+                ++cc;
+            }
+            else break;
+        }
+
+        /// Execute Code
+        int cnt=0;
+        int pc=0;
+        while(1)
+        {
+            int opt=mem[pc];
+            ++cnt;
+            ++pc;
+            if(opt==100)
+            {
+                break;
+            }
+
+            int d=(opt%100)/10;
+            int n=opt%10;
+
+            switch(opt/100)
+            {
+            case 0:
+                if(reg[n]) pc=reg[d];
+                break;
+            case 2:
+                reg[d]=n;
+                break;
+            case 3:
+                reg[d]=(reg[d]+n)%1000;
+                break;
+            case 4:
+                reg[d]=(reg[d]*n)%1000;
+                break;
+            case 5:
+                reg[d]=reg[n];
+                break;
+            case 6:
+                reg[d]=(reg[d]+reg[n])%1000;
+                break;
+            case 7:
+                reg[d]=(reg[d]*reg[n])%1000;
+                break;
+            case 8:
+                reg[d]=mem[reg[n]];
+                break;
+            case 9:
+                mem[reg[n]]=reg[d];
+                break;
+            }
+        }
+
+        printf("%d\n",cnt);
+        if(t) printf("\n");
+    }
+
+    return 0;
+}
diff --git a/UVA/10137.cpp b/UVA/10137.cpp
new file mode 100644
index 0000000..cf7f48e
--- /dev/null
+++ b/UVA/10137.cpp
@@ -0,0 +1,56 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <algorithm>
+using namespace std;
+
+double v[1010];
+
+int main()
+{
+    int n;
+    while(scanf("%d",&n)==1&&n)
+    {
+        double sum=0;
+        for(int i=0;i<n;i++)
+        {
+            scanf("%lf",&v[i]);
+            sum+=v[i];
+        }
+        double ave=sum/n;
+
+        /// Why?
+        int c=ave*100;
+        double ave_x=c/100+c%100*0.01;
+
+        double ave_f;
+        if(ave==ave_x)
+        {
+            ave_f=ave_x;
+        }
+        else
+        {
+            ave_f=ave_x+0.01;
+        }
+
+        double totalA=0;
+        double totalB=0;
+        for(int i=0;i<n;i++)
+        {
+            if(v[i]<=ave)
+            {
+                totalA+=ave_x-v[i];
+            }
+            else
+            {
+                totalB+=v[i]-ave_f;
+            }
+        }
+
+        double total=max(totalA,totalB);
+
+        printf("$%.2f\n",total);
+    }
+
+    return 0;
+}
diff --git a/UVA/10189.cpp b/UVA/10189.cpp
new file mode 100644
index 0000000..f283a38
--- /dev/null
+++ b/UVA/10189.cpp
@@ -0,0 +1,64 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <algorithm>
+using namespace std;
+
+char buff[110][110];
+int mp[110][110];
+
+int main()
+{
+    int cc=1;
+
+    int n,m;
+    while(scanf("%d %d%*c",&n,&m)==2&&n&&m)
+    {
+        if(cc!=1) printf("\n");
+
+        printf("Field #%d:\n",cc++);
+        memset(mp,0,sizeof(mp));
+
+        for(int i=1;i<=n;i++)
+        {
+            scanf("%s",&buff[i][1]);
+        }
+
+        for(int i=1;i<=n;i++)
+        {
+            for(int j=1;j<=m;j++)
+            {
+                if(buff[i][j]=='*')
+                {
+                    mp[i][j]=-999;
+                    ++mp[i-1][j-1];
+                    ++mp[i-1][j];
+                    ++mp[i-1][j+1];
+                    ++mp[i][j-1];
+                    ++mp[i][j+1];
+                    ++mp[i+1][j-1];
+                    ++mp[i+1][j];
+                    ++mp[i+1][j+1];
+                }
+            }
+        }
+
+        for(int i=1;i<=n;i++)
+        {
+            for(int j=1;j<=m;j++)
+            {
+                if(mp[i][j]<0)
+                {
+                    printf("*");
+                }
+                else
+                {
+                    printf("%d",mp[i][j]);
+                }
+            }
+            printf("\n");
+        }
+    }
+
+    return 0;
+}