1 #include<bits/stdc++.h>
 2 using namespace std;
 3 string s = "1111111111";
 4 bitset<10> a(s), b(0), t1(0), t2(0), t3(0);
 5 int n, t;
 6 string c;
 7 int main() {
 8     cin >> n;
 9     while(n--) {
10         cin >> c >> t;
11         if(c == "&") {
12             a &= t;
13             b &= t;
14         } else if(c == "|") {
15             a |= t;
16             b |= t;
17         } else {
18             a ^= t;
19             b ^= t;
20         }
21     }
22     
23     for(int i = 0; i < 10; i++) {
24         if(a[i] == 0 && b[i] == 0) {
25             t1[i] = 0;
26             t2[i] = 0;
27             t3[i] = 0;    
28         } else if(a[i] == 0 && b[i] == 1) {
29             t1[i] = 1;
30             t2[i] = 1;
31             t3[i] = 0;
32         } else if(a[i] == 1 && b[i] == 0) {
33             t1[i] = 1;
34             t2[i] = 0;
35             t3[i] = 0;
36         } else if(a[i] == 1 && b[i] == 1) {
37             t1[i] = 1;
38             t2[i] = 0;
39             t3[i] = 1;
40         }
41     }
42 
43     cout << 3 << endl;
44     cout << "& " << t1.to_ulong() << endl;
45     cout << "^ " << t2.to_ulong() << endl;
46     cout << "| " << t3.to_ulong() << endl;
47     
48     return 0;
49 }