Add 2020 source files for real

2020/kurdyukov3/prog.c

@@ -0,0 +1,14 @@
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+int main(){unsigned
+a,i=1,j=0,t[64];for
+(srand(time(0));i;)
+j=j?--i<1&&a>>8?0:(
+putchar(i?t[j]:a),i
+++)?t[j]=t[--i],i>2
+?rand()%(i-2)+2:1:0
+:(26>((a=getchar())
+|32)-97||1==a>>7)&&
+i<64?t[i++]=a,0:1;}
+