Submission #388664

#TimeUsernameProblemLanguageResultExecution timeMemory
388664kshitij_sodaniCake 3 (JOI19_cake3)C++14
100 / 100
2580 ms205360 KiB
//#pragma GCC optimize("Ofast,unroll-loops") #include <bits/stdc++.h> using namespace std; typedef long long llo; #define mp make_pair #define pb push_back #define a first #define b second #define endl '\n' llo n,m; llo ll[200000*30]; llo rr[200000*30]; llo tree[200000*30]; llo ll2[200000*30]; llo rr2[200000*30]; llo tree2[200000*30]; llo ind[200001]; vector<llo> rr3; vector<llo> rr4; llo co=0; llo update(llo no,llo l,llo r,llo i){ llo cur=co; co++; ll[cur]=ll[no]; rr[cur]=rr[no]; tree[cur]=tree[no]; if(l==r){ tree[cur]+=1; return cur; } else{ llo mid=(l+r)/2; if(i<=mid){ ll[cur]=update(ll[no],l,mid,i); } else{ rr[cur]=update(rr[no],mid+1,r,i); } tree[cur]=tree[ll[cur]]+tree[rr[cur]]; return cur; } } llo query(llo no,llo no2,llo l,llo r,llo k){ if(l==r){ return l; } else{ llo mid=(l+r)/2; if(tree[ll[no2]]-tree[ll[no]]>=k){ return query(ll[no],ll[no2],l,mid,k); } else{ return query(rr[no],rr[no2],mid+1,r,k-(tree[ll[no2]]-tree[ll[no]])); } } } llo co2=0; llo update2(llo no,llo l,llo r,llo i,llo val){ llo cur=co2; co2++; ll2[cur]=ll2[no]; rr2[cur]=rr2[no]; tree2[cur]=tree2[no]; if(l==r){ tree2[cur]+=val; return cur; } else{ llo mid=(l+r)/2; if(i<=mid){ ll2[cur]=update2(ll2[no],l,mid,i,val); } else{ rr2[cur]=update2(rr2[no],mid+1,r,i,val); } tree2[cur]=tree2[ll2[cur]]+tree2[rr2[cur]]; return cur; } } llo query2(llo no,llo l,llo r,llo aa,llo bb){ if(r<aa or l>bb){ return 0; } if(aa<=l and r<=bb){ return tree2[no]; } else{ llo mid=(l+r)/2; return query2(ll2[no],l,mid,aa,bb)+query2(rr2[no],mid+1,r,aa,bb); } } vector<pair<llo,llo>> ss; vector<pair<llo,llo>> ee; llo solve(llo l,llo r){ llo su=ss[l].b+ss[r].b-2*(ss[r].a-ss[l].a); l++; r--; llo kk=query(rr3[l],rr3[r+1],0,n-1,m-2); llo cot=query2(rr4[kk+1],0,n-1,l,r);//+su; //cout<<l-1<<":"<<r+1<<":"<<cot<<endl; //cout<<kk<<",,"<<endl; return cot+su; } llo ans=-1e18; void solve(int l,int r,int aa,int bb){ int mid=(l+r)/2; pair<llo,llo> ma={-1e18,-1}; for(int i=max(aa,mid);i<=bb;i++){ if(i-mid+1>=m){ //cout<<mid<<":"<<i<<endl; pair<llo,llo> cur={solve(mid,i),i}; if(cur.a>ma.a){ ma=cur; } } } // cout<<mid<<":"<<ma.b<<endl; ans=max(ans,ma.a); if(mid>l){ solve(l,mid-1,aa,ma.b); } if(mid<r){ solve(mid+1,r,ma.b,bb); } } int main(){ ios_base::sync_with_stdio(false); cin.tie(NULL); cin>>n>>m; for(llo i=0;i<2*n;i++){ ll[i]=2*i+1; rr[i]=2*i+2; ll2[i]=2*i+1; rr2[i]=2*i+2; co=max(co,rr[i]+1); co2=max(co2,rr[i]+1); } for(llo i=0;i<n;i++){ llo aa,bb; cin>>aa>>bb; ss.pb({bb,aa}); } sort(ss.begin(),ss.end()); /*for(auto j:ss){ cout<<j.a<<":"<<j.b<<endl; }*/ for(llo i=0;i<n;i++){ ee.pb({-ss[i].b,i}); } sort(ee.begin(),ee.end()); for(llo i=0;i<n;i++){ ind[ee[i].b]=i; } rr3.pb(0); for(llo i=0;i<n;i++){ llo x=update(rr3.back(),0,n-1,ind[i]); rr3.pb(x); } rr4.pb(0); for(llo i=0;i<n;i++){ rr4.pb(update2(rr4.back(),0,n-1,ee[i].b,-ee[i].a)); } solve(0,n-m,0,n-1); cout<<ans<<endl; return 0; llo la=-1; /* for(auto j:ss){ cout<<j.a<<"."<<j.b<<endl; }*/ for(llo i=0;i<n;i++){ llo su=ss[i].b+2*ss[i].a; priority_queue<llo> tt; pair<llo,llo> ma={-1e18,-1}; for(llo j=i+1;j<n;j++){ while(tt.size()>m-2){ su+=tt.top(); tt.pop(); } if(j>=la){ if(j-i-1>=m-2){ pair<llo,llo> cur={solve(i,j),j}; if(cur.a>ma.a){ ma=cur; } } } su+=ss[j].b; tt.push(-ss[j].b); } ans=max(ans,ma.a); la=ma.b; } cout<<ans<<endl; return 0; }

Compilation message (stderr)

cake3.cpp: In function 'int main()':
cake3.cpp:188:19: warning: comparison of integer expressions of different signedness: 'std::priority_queue<long long int>::size_type' {aka 'long unsigned int'} and 'llo' {aka 'long long int'} [-Wsign-compare]
  188 |    while(tt.size()>m-2){
      |          ~~~~~~~~~^~~~
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