CodeForces - 468A 24 Game

 1 #include<iostream>
 2 using namespace std;
 3 #include<cstring>
 4 #include<cstdio>
 5 #include<cmath>
 6 #include<vector>
 7 typedef long long ll;
 8 void out(ll x,ll y,ll z,char c){
 9     printf("%I64d %c %I64d = %I64d\n",x,c,y,z);
10 }
11 int main(){
12     ll n;
13     cin>>n;
14     if(n<4){
15         printf("NO");
16         return 0;
17     }
18     printf("YES\n");
19     if(n==4){
20         out(1,2,2,‘*‘);
21         out(2,3,6,‘*‘);
22         out(6,4,24,‘*‘);
23     }
24     else if((n&1)==0){
25         out(1,2,2,‘*‘);
26         out(2,3,6,‘*‘);
27         out(6,4,24,‘*‘);
28         for(int i=n;i>4;i-=2){
29             out(i,i-1,(long long)i-(i-1),‘-‘);
30             out(1,24,24,‘*‘);
31         }
32     }
33     else{
34         out(3,4,12,‘*‘);
35         out(5,2,3,‘-‘);
36         out(3,1,2,‘-‘);
37         out(2,12,24,‘*‘);
38         if(n==5)
39             return 0;
40         for(int i=n;i>5;i-=2){
41             out(i,i-1,(long long)i-(i-1),‘-‘);
42             out(1,24,24,‘*‘);
43         }
44     }
45     return 0;
46 }