Codeforces VK Cup Finals #424 Div.1 C. Bamboo Partition(数论)
2017-08-26 23:30
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题目要求符合以下条件的最大的d
#include<bits/stdc++.h> #define ll long long using namespace std; const int maxn=110,inf=1e9; ll n,k,ans,r; ll a[maxn]; void read(ll &k) { int f=1;k=0;char c=getchar(); while(c<'0'||c>'9')c=='-'&&(f=-1),c=getchar(); while(c<='9'&&c>='0')k=k*10+c-'0',c=getchar(); k*=f; } int main() { read(n);read(k); for(int i=1;i<=n;i++)read(a[i]),k+=a[i]; for(ll d=1;d<=1000000000;d=r+1) { r=1ll*10000*inf; for(int i=1;i<=n;i++)if(a[i]>d)r=min(r,(a[i]-1)/((a[i]-1)/d)); ll tot=0;for(int i=1;i<=n;i++)tot+=(a[i]-1)/d+1; ll mxd=k/tot;if(d<=mxd&&mxd<=r)ans=max(ans,mxd); } printf("%lld\n",ans); return 0; }View Code
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