A

 1 #include <cstdio>
 2 #include <cstring>
 3 #include <vector>
 4 #include <algorithm>
 5 #include <set>
 6 #include <iostream>
 7 using namespace std;
 8 const int MAX = 1e5+10;
 9 double a[MAX];
10 int main() {
11     int n,m,k;
12     while(scanf("%d %d %d",&n,&k,&m)==3) {
13         a[0]=0;
14         for(int i=1;i<=n;i++) {
15             cin>>a[i];
16         }
17         double res1=0,res2=0;
18         double last1=-1,last2=-1;
19         bool last=true;
20         int x=max(k,m);
21         for(int i=1;i<=n;i++) {
22             res1+=a[i];
23             res2+=a[i];
24             if(i>=m) res1-=a[i-m];
25             if(i>=k) res2-=a[i-k];
26             if(i <= x){
27                 if(i==1) {
28                     printf("silent");
29                 }
30                 else {
31                     printf(" silent");
32                 }
33                 last1=res1/m;
34                 last2=res2/k;
35                 continue;
36             }
37             if(i<x) {
38                 if(i==1) {
39                     printf("silent");
40                 }
41                 else {
42                     printf(" silent");
43                 }
44                 continue;
45             }
46           //  printf("%lf %lf
",res2/k,res1/m);
47             if(last1>=last2&&res1*k<res2*m) {
48                 if(i==1) {
49                     printf("buy");
50                 }
51                 else {
52                     printf(" buy");
53                 }
54             }
55             else if(last1<=last2&&res1*k>res2*m) {
56                 if(i==1) {
57                     printf("sell");
58                 }
59                 else {
60                     printf(" sell");
61                 }
62             }
63             else {
64                 if(i==1) {
65                     printf("silent");
66                 }
67                 else {
68                     printf(" silent");
69                 }
70             }
71             last1=res1/m;
72             last2=res2/k;
73         }
74         printf("
");
75     }
76 }