hdu 2015~2019

 1 #include<stdio.h>
 2 int main()
 3 {
 4     int m,n,sum=0,ave,i,count=1;
 5     while (scanf("%d%d",&n,&m)!=EOF)
 6     {
 7         for (i=1;i<=n;i++,count++)
 8         {
 9             sum+=2*i;
10             if (count==m||i==n)
11             {
12                 ave=sum/count;
13                 printf("%d",ave);
14                 if (i!=n) printf(" ");
15                 count=0;
16                 sum=0;
17             }
18         }
19         printf("\n");
20     }
21     return 0;
22 }

 1 #include<stdio.h>
 2 int main()
 3 {
 4     int n,a[100],i,m;
 5     while (scanf("%d",&n)!=EOF)
 6     {
 7         m=0;
 8         if (n!=0)
 9         {
10             for (i=0;i<n;i++)
11             {
12                 scanf("%d",&a[i]);
13                 if (a[i]<a[m]) m=i;
14             }
15             i=a[0];
16             a[0]=a[m];
17             a[m]=i;
18             for (i=0;i<n-1;i++) printf("%d ",a[i]);
19             printf("%d\n",a[n-1]);
20         }
21     }
22     return 0;
23 }

 1 #include<stdio.h>
 2 #include<string.h>
 3 int main()
 4 {
 5     int n,i,len,j,count;
 6     char a[100];
 7     while (scanf("%d",&n)!=EOF)
 8     {
 9         for (i=1;i<=n;i++)
10         {
11             count=0;
12             scanf("%s",a);
13             len=strlen(a);
14             for (j=0;j<len;j++) if (a[j]>=‘0‘&&a[j]<=‘9‘) count++;
15             printf("%d\n",count);
16         }
17     }
18     return 0;
19 }

1 #include<stdio.h>
2 int main()
3 {
4     int n,a[54],i;
5     for (i=0;i<4;i++) a[i]=i+1;
6     for (i=4;i<=53;i++) a[i]=a[i-1]+a[i-3];
7     while (scanf("%d",&n)!=EOF) if (n!=0) printf("%d\n",a[n-1]);
8     return 0;
9 }

1 #include<stdio.h>
2 int main()
3 {
4     int n,a[54],i;
5     for (i=0;i<4;i++) a[i]=i+1;
6     for (i=4;i<=53;i++) a[i]=a[i-1]+a[i-3];
7     while (scanf("%d",&n)!=EOF) if (n!=0) printf("%d\n",a[n-1]);
8     return 0;
9 }