HDU 5777 domino

贪心一下。有k次机会，也就是那些数字中，最大的k-1可以不选择。答案为：sum{a[i]}-sum{最大的k-1个a[i]}+n。注意：k>=n的时候直接输出n。

#pragma comment(linker, "/STACK:1024000000,1024000000")
#include<cstdio>
#include<cstring>
#include<cmath>
#include<algorithm>
#include<vector>
#include<map>
#include<set>
#include<queue>
#include<stack>
#include<iostream>
using namespace std;
typedef long long LL;
const double pi=acos(-1.0),eps=1e-8;
void File()
{
    freopen("D:\in.txt","r",stdin);
    freopen("D:\out.txt","w",stdout);
}
inline int read()
{
    char c = getchar();  while(!isdigit(c)) c = getchar();
    int x = 0;
    while(isdigit(c)) { x = x * 10 + c - '0'; c = getchar(); }
    return x;
}

const int maxn=100000+10;
int T,n,k;
LL a[maxn],ans;
struct X{int p; LL val;}s[maxn];
bool cmp(X a,X b){ return a.val>b.val; }

int main()
{
    scanf("%d",&T);
    while(T--)
    {
        scanf("%d%d",&n,&k);  ans=0;
        for(int i=1;i<=n-1;i++) scanf("%lld",&a[i]);
        if(k>=n) { printf("%d
",n); continue; }
        sort(a+1,a+n);
        for(int i=1;i<=n-k;i++) ans=ans+a[i]; ans=ans+n;
        printf("%lld
",ans);
    }
    return 0;
}