codefoces 581C Developing Skills（贪心）

#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
bool cmp(int x,int y)
{
return x%10>y%10;
}
int main()
{
int n,k,i,j,a[100005],b[100005],t,sum;
while(scanf("%d%d",&n,&k)!=EOF)
{
sum=0;
for(i=1;i<=n;i++)
{
scanf("%d",&a[i]);
t=a[i]/10;
sum+=t;

}
sort(a+1,a+1+n,cmp);
for(i=1;i<=n;i++)
{
t=a[i]/10;
b[i]=(t+1)*10-a[i];
b[i]=b[i]%10;
if(k>=b[i]&&b[i])
{
sum++;
k=k-b[i];
a[i]=(a[i]/10+1)*10;
}

}
if(k>0){
for(i=1;i<=n&&k>0;i++)
{
while(a[i]<100&&k>=10){
a[i]+=10;
sum++;
k=k-10;
}
}
}
printf("%d\n",sum);
}
return 0;
}