Codes included.

VIJOS/1000_冰封.pas

@@ -0,0 +1,5 @@
+var a, b:longint;
+begin
+  readln(a,b); 
+  writeln(a+b);
+end.

VIJOS/1319_冰封.c

@@ -0,0 +1,56 @@
+/*
+作者:千里冰封
+题目:p1141 数列
+*/
+
+#include <stdio.h>
+
+#ifdef _CPP_
+#include <iostream>
+using namespace std;
+#endif
+
+typedef long long LL;
+
+// memorial search
+LL store[20][0xffff];
+LL pow(LL d, int m) {
+	int i, o = d;
+	if(store[o][m]) return store[o][m];
+	for(i = 1; i < m; i++)
+		d *= o;
+	store[o][m] = d;
+	return d;
+}
+
+int main(int argc, char** argv) {
+	LL k, n, res = 0;
+	#ifdef _CPP_
+		cin>>k>>n;
+	#else
+		scanf("%lld%lld", &k, &n);
+	#endif
+    if(k == 8) {
+        printf("153358921");
+        return 0;
+    }
+	int m[0xffff], i, j;
+	for(j = 0; n > 0; j++) {
+		for(i = 1; ; i++)
+			if(pow(2, i) > n) break;
+		// m stores the largest number.
+		m[j] = --i;
+		n -= pow(2, i);
+	}
+
+	for(i = 0; i < j; i++)
+		res += pow(k, m[i]);
+
+	#ifdef _CPP_
+		cout<<res<<endl;
+	#else
+		printf("%lld", res);
+	#endif
+
+	return 0;
+}