**PAT(Basic Level) 1012 数字分类

 1 #include<iostream>
 2 #include <iomanip>
 3 
 4 using namespace std;
 5 
 6 int main()
 7 {
 8     int N;
 9     cin>>N;
10     
11     int n;
12     int j=1;
13     int sum0=0,yu0=0,sum1=0,yu1=0,yu2=0,yu3=0,sum3=0,max4=-1,yu4=0;
14     for(int i=0;i<N;i++){
15         cin>>n;
16         if(n>=5&&n%10==0){
17             yu0++;
18             sum0=sum0+n;
19         }
20         else if(n%5==1){
21             yu1++;
22             sum1=sum1+j*n;
23             j=(-1)*j;
24            }
25         else if(n%5==2){
26             yu2++;
27         }
28         else if(n%5==3){
29             yu3++;
30             sum3=sum3+n;
31         }
32         else{
33             yu4++;
34             if(n>max4) max4=n;
35         }
36     }
37     
38     
39     if(yu0==0) cout<<"N"<<" ";
40     else cout<<sum0<<" ";
41     
42     if(yu1==0) cout<<"N"<<" ";
43     else cout<<sum1<<" ";
44     
45     if(yu2==0) cout<<"N"<<" ";
46     else cout<<yu2<<" ";
47     
48     double q=(double)sum3;
49     double w=(double)yu3;
50     if(yu3==0) cout<<"N"<<" ";
51     else {
52         cout<<setprecision(1) <<std::fixed<<q/w<<" ";
53     }
54     
55     if(yu4==0) cout<<"N";
56     else cout<<max4;
57 
58     return 0;
59 }

 1 #include <iostream>
 2 #include <iomanip>
 3 using namespace std;
 4  
 5 int main()
 6 {
 7     bool flag1=false;
 8     bool flag2=false;
 9     bool flag3=false;
10     bool flag4=false;
11     bool flag5=false;
12     int N;
13     int factor=1;
14     int t=0;
15     int A=0;
16     int mod=0;
17     int A1=0,A2=0,A3=0,A5=0;
18     double A4=0;
19     int k=0;
20     cin>>N;
21     while(N--)
22     {
23         cin>>t;                   
24         A=t/5;
25         mod=t%5;
26         switch(mod)
27         {
28         case 0:
29             if(A%2==0) {A1+=t;flag1=true;} break;
30         case 1:
31             A2 += factor*t; factor=-factor;flag2=true;break;
32         case 2:
33             A3++;flag3=true;break;
34         case 3:
35             A4+=t;k++;flag4=true;break;
36         case 4:
37             if(A5<t) A5=t;flag5=true;break;                                       
38         }
39  
40     }
41     if (flag1)
42     cout<< A1<<" ";
43     else
44     cout<<"N"<<" ";
45     if (flag2)
46         cout<< A2<<" ";
47     else
48         cout<<"N"<<" ";
49     if (flag3)
50         cout<< A3<<" ";
51     else
52         cout<<"N"<<" ";
53     if (flag4)
54         cout<<fixed<<setprecision(1)<<A4/k<<" ";
55     else
56         cout<<"N"<<" ";
57     if (flag5)
58         cout<<A5;
59     else
60         cout<<"N";
61     cout<<endl;
62     //system("PAUSE");
63     return 0;
64 }
//来自：https://www.cnblogs.com/ainima/p/6331249.html