제출 #365492

#제출 시각아이디문제언어결과실행 시간메모리
365492denkendoemeer전선 연결 (IOI17_wiring)C++14
0 / 100
2 ms1900 KiB
#include<bits/stdc++.h> #include "wiring.h" using namespace std; #define ll long long vector<pair<int,bool>>pct; ll dp[200005],last[200005]; int t[200005],cnt[200005]; ll calc(int l,int r) { int aux=t[r],st=r+1-aux,dr=aux-l; ll ans=last[r+1]-last[aux]-last[aux]+last[l]; if (st>dr) ans=ans-1LL*(st-dr)*pct[aux-1].first; if (st<dr) ans=ans+1LL*(dr-st)*pct[aux].first; return ans; } ll min_total_length(vector<int>red,vector<int>blue) { int n=blue.size(),m=red.size(); int i; for(i=0;i<n;i++) pct.push_back(make_pair(blue[i],1)); for(i=0;i<m;i++) pct.push_back(make_pair(red[i],0)); sort(pct.begin(),pct.end()); n=n+m; for(i=1;i<=n;i++) t[i]=t[i-1]+pct[i-1].first; memset(dp,50,sizeof(dp)); int j; for(i=1;i<n;i++){ t[i]=t[i-1]; if (pct[i].second!=pct[i-1].second){ int pre=t[i]; t[i]=i; dp[i]=dp[i-1]+calc(i-1,i); cnt[i]=1; for(j=pre;j<i;j++) if (dp[i]>dp[j-1]+calc(j,i)) cnt[i]=i-j,dp[j]=dp[j-1]+calc(j,i); } else if (t[i]>0){ cnt[i]=cnt[i-1]; j=t[i]-cnt[i]; if (cnt[i-1]==i-t[i]) if (j>t[j] && dp[j-1]+calc(j,i)>dp[j-2]+calc(j-1,i)) cnt[i]++,j--; dp[i]=min(dp[j],dp[j-1])+calc(j,i); } } return dp[n-1]; }
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