diff --git a/POJ/3939_seekforcode.cpp b/POJ/3939_seekforcode.cpp
new file mode 100644
index 0000000..50704d1
--- /dev/null
+++ b/POJ/3939_seekforcode.cpp
@@ -0,0 +1,85 @@
+#include<iostream>
+#include<string>
+#include<stdio.h>
+using namespace std;
+int weekday(int y,int m,int d)
+{
+
+
+       int tm=m>=3?(m-2):(m+10);
+
+
+       int ty=m>=3?y:(y-1);
+
+
+       return (ty+ty/4-ty/100+ty/400+(int)(2.6*tm-0.2)+d)%7;
+}
+int preoperate()
+{
+int year,mon,da,cont=0;
+for(year=1753;year<=1753+400;year++)
+{
+for(mon=1;mon<=12;mon++)
+{
+for(da=1;da<=21;da=da+10)
+{
+if(weekday(year,mon,da)==1)
+cont++;
+}
+}
+}
+return cont;
+}
+void gotowhat(int y,int m,int d,int howmany)
+{
+int cont=howmany;
+int year,mon,da;
+year=y;
+for(mon=m;mon<=12;mon++)
+{
+for(da=(mon==m?d:1);da<=21;da=da+10)
+{
+         int tag=weekday(year,mon,da);
+if(tag==1)
+cont--;
+if(cont==0)
+{
+cout<<year<<" "<<mon<<" "<<da<<endl;
+return ;
+}
+}
+}
+for(year=y+1;year<=y+500;year++)
+{
+for(mon=1;mon<=12;mon++)
+{
+for(da=1;da<=21;da=da+10)
+{
+       int tag=weekday(year,mon,da);
+if(tag==1)
+cont--;
+if(cont==0)
+{
+cout<<year<<" "<<mon<<" "<<da<<endl;
+return ;
+}
+}
+}
+}
+}
+int main()
+{
+int t,y,m,d,number,st,ts;
+int oneturn=preoperate();
+cin>>t;
+while(t--)
+{
+cin>>y>>m>>d>>number;
+st=number%2058;
+ts=number/2058;
+y+=400*ts;
+                number=number-2058*ts;
+gotowhat(y,m,d,number);
+}
+return 0;
+}