diff --git a/POJ/3190.cpp b/POJ/3190.cpp
new file mode 100644
index 0000000..2615acb
--- /dev/null
+++ b/POJ/3190.cpp
@@ -0,0 +1,74 @@
+
+#include <cstdio>
+#include <functional>
+#include <queue>
+#include <algorithm>
+using namespace std;
+
+
+struct cow
+{
+    int start,over;
+    int pos;
+    bool operator <(const cow& b) const
+    {
+        if(over==b.over)
+            return start>b.start;
+        return over>b.over;
+    }
+};
+
+bool cmp(const cow& a,const cow& b)
+{
+    if(a.start==b.start) return a.over<b.over;
+    return a.start<b.start;
+}
+
+
+priority_queue<cow> bus;
+int use[50001];
+cow cowx[50001];
+
+int cnt=1;
+
+int main()
+{
+    int n;
+    while(scanf("%d",&n)==1)
+    {
+
+        for(int i=0; i<n; i++)
+        {
+            int a,b;
+            scanf("%d %d",&a,&b);
+            cowx[i].start=a;
+            cowx[i].over=b;
+            cowx[i].pos=i;
+        }
+        sort(cowx,cowx+n,cmp);
+        use[cowx[0].pos]=1;
+        bus.push(cowx[0]);
+        for(int i=1; i<n; i++)
+        {
+            if(!bus.empty()&&bus.top().over<cowx[i].start)
+            {
+                use[cowx[i].pos]=use[bus.top().pos];
+                bus.pop();
+            }
+            else
+            {
+                ++cnt;
+                use[cowx[i].pos]=cnt;
+            }
+            bus.push(cowx[i]);
+        }
+        printf("%d\n",cnt);
+        for(int i=0; i<n; i++)
+        {
+            printf("%d\n",use[i]);
+        }
+    }
+    return 0;
+}
+
+