38 lines
902 B
C++
38 lines
902 B
C++
#include <iostream>
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#include <cstdio>
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#include <cstring>
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#include <algorithm>
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using namespace std;
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typedef __int64 LL;
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const LL INF = 0x3f3f3f3f3f3f3f3fLL;
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LL a[105];
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int judge(LL mid,LL n,LL m){
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LL sum = 0;
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for(int i = 0; i <n; ++i)
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if(a[i] >= mid) sum += mid;
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else sum += a[i];
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if(sum >= m * mid) return 1;
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return 0;
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}
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int main()
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{ LL n,m,sum,minx;
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while(~scanf("%I64d%I64d",&n,&m)){
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sum = 0,minx = INF;
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for(int i = 0; i < n; ++i){
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scanf("%d",&a[i]);
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minx = min(minx,a[i]);
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sum += a[i];
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}
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LL L = minx,R = sum/m,mid,ans;
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while(L <= R){
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mid = (R + L) >> 1;
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if(judge(mid,n,m)){
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ans = mid;
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L = mid + 1;
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}else R = mid - 1;
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}
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printf("%I64d\n",ans);
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}
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return 0;
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}
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