oj.uz

답안 #165601

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
165601 2019-11-27T14:34:07 Z Segtree Shortcut (IOI16_shortcut) C++14
0 / 100
 12 ms 380 KB 
#include<iostream>
#include<algorithm>
#include<vector>
#include<queue>
#include"shortcut.h"
using namespace std;
typedef long long ll;
#define chmin(a,b) a=min(a,b)
#define chmax(a,b) a=max(a,b)
#define N 510
ll r[N],d[N],n,cost,sr;
ll solve(ll p,ll q){
    if(p>=q)return 1e17;
    if(r[q]-r[p]<=cost)return sr;
    ll x=-1e17;
    for(int i=0;i<=p;i++){
	chmax(x,r[p]-r[i]+d[i]);
    }
    ll y=-1e17;
    for(int i=q;i<n;i++){
	chmax(y,r[i]-r[q]+d[i]);
    }
    ll ans=x+y+cost;
    for(int i=p+1;i<=q-1;i++){
	chmax(ans,x+d[i]+min(r[i]-r[p],r[q]-r[i]+cost));
	chmax(ans,y+d[i]+min(r[i]-r[p]+cost,r[q]-r[i]));
    }
    
    ll mik=1e17;
    for(int i=0;i<=p;i++){
	chmax(ans,r[i]+d[i]-mik);
	chmin(mik,r[i]-d[i]);
    }
    mik=1e17;
    for(int i=q;i<n;i++){
	chmax(ans,r[i]+d[i]-mik);
	chmin(mik,r[i]-d[i]);
    }
    
    if(p<q-1){
	ll key=cost+r[q]-r[p];
	vector<ll> rs,ds;
	for(int k=0;k<=2;k++){
	    for(int i=p;i<=q;i++){
		rs.push_back(r[i]-r[p]+k*key);
		ds.push_back(d[i]);
	    }
	}
	int j=1;
	deque<pair<ll,ll> > Q;
	for(int i=0;i<=q-p;i++){
	    for(;j<rs.size()&&(rs[j]-rs[i])*2LL<=key;j++){
		while(!Q.empty()&&Q.back().first<=rs[j]+ds[j])Q.pop_back();
		Q.push_back(make_pair(rs[j]+ds[j],j)); 
	    }
	    while(!Q.empty()&&Q.front().second<=i)Q.pop_front();
	    if(!Q.empty())chmax(ans,Q.front().first-rs[i]+ds[i]);
	}
    }
    return ans;
}
ll dfs(ll l,ll r,ll lo,ll up){
    if(l>r)return 1e17;
    ll m=(l+r)>>1;
    ll mi=1e17,pnt=-1;
    for(int i=lo;i<=up;i++){
	ll res=solve(m,i);
	if(mi>res){
	    mi=res;
	    pnt=i;
	}
    }//cout<<m<<" "<<pnt<<" "<<mi<<endl;
    if(l==r)return mi;
    chmin(mi,dfs(l,m-1,lo,pnt));
    chmin(mi,dfs(m+1,r,pnt,up));
    return mi;
}
ll find_shortcut(int nn,vector<int> l,vector<int> dd,int cc){
    n=nn,cost=cc;
    for(int i=0;i<n;i++)d[i]=dd[i];
    r[0]=0;
    for(int i=0;i<n-1;i++)r[i+1]=r[i]+l[i];
    ll ans=-1e17;
    for(int i=0;i<n;i++)for(int j=i+1;j<n;j++){
	chmax(ans,r[j]-r[i]+d[i]+d[j]);
    }
    sr=ans;
    ll bef=-1;
    for(int p=0;p<n-1;p++){
	ll mi=1e17,pnt=-1;
	for(int q=p+1;q<n;q++){
	    ll res=solve(p,q);
	    chmin(ans,res);
	    if(mi>res){
		mi=res;
		pnt=q;
	    }
	}
	if(mi==sr)continue;
	//cout<<p<<":"<<pnt<<" "<<mi<<endl;
	if(bef>pnt)return -1;
	bef=pnt;
    }
    //chmin(ans,dfs(0,n-2,0,n-1));
    return ans;
}

Compilation message

shortcut.cpp: In function 'll solve(ll, ll)':
shortcut.cpp:52:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(;j<rs.size()&&(rs[j]-rs[i])*2LL<=key;j++){
           ~^~~~~~~~~~

Subtask #1
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB n = 4, 80 is a correct answer
2 Correct 2 ms 256 KB n = 9, 110 is a correct answer
3 Correct 2 ms 256 KB n = 4, 21 is a correct answer
4 Correct 2 ms 380 KB n = 3, 4 is a correct answer
5 Correct 2 ms 376 KB n = 2, 62 is a correct answer
6 Correct 12 ms 256 KB n = 2, 3 is a correct answer
7 Correct 2 ms 376 KB n = 3, 29 is a correct answer
8 Correct 2 ms 256 KB n = 2, 3 is a correct answer
9 Correct 2 ms 376 KB n = 2, 3 is a correct answer
10 Correct 7 ms 376 KB n = 2, 2000000001 is a correct answer
11 Correct 2 ms 256 KB n = 2, 3000000000 is a correct answer
12 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
13 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
14 Correct 2 ms 256 KB n = 4, 3000000001 is a correct answer
15 Correct 2 ms 376 KB n = 4, 4000000000 is a correct answer
16 Incorrect 2 ms 376 KB n = 5, incorrect answer: jury 4000000000 vs contestant -1
17 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB n = 4, 80 is a correct answer
2 Correct 2 ms 256 KB n = 9, 110 is a correct answer
3 Correct 2 ms 256 KB n = 4, 21 is a correct answer
4 Correct 2 ms 380 KB n = 3, 4 is a correct answer
5 Correct 2 ms 376 KB n = 2, 62 is a correct answer
6 Correct 12 ms 256 KB n = 2, 3 is a correct answer
7 Correct 2 ms 376 KB n = 3, 29 is a correct answer
8 Correct 2 ms 256 KB n = 2, 3 is a correct answer
9 Correct 2 ms 376 KB n = 2, 3 is a correct answer
10 Correct 7 ms 376 KB n = 2, 2000000001 is a correct answer
11 Correct 2 ms 256 KB n = 2, 3000000000 is a correct answer
12 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
13 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
14 Correct 2 ms 256 KB n = 4, 3000000001 is a correct answer
15 Correct 2 ms 376 KB n = 4, 4000000000 is a correct answer
16 Incorrect 2 ms 376 KB n = 5, incorrect answer: jury 4000000000 vs contestant -1
17 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB n = 4, 80 is a correct answer
2 Correct 2 ms 256 KB n = 9, 110 is a correct answer
3 Correct 2 ms 256 KB n = 4, 21 is a correct answer
4 Correct 2 ms 380 KB n = 3, 4 is a correct answer
5 Correct 2 ms 376 KB n = 2, 62 is a correct answer
6 Correct 12 ms 256 KB n = 2, 3 is a correct answer
7 Correct 2 ms 376 KB n = 3, 29 is a correct answer
8 Correct 2 ms 256 KB n = 2, 3 is a correct answer
9 Correct 2 ms 376 KB n = 2, 3 is a correct answer
10 Correct 7 ms 376 KB n = 2, 2000000001 is a correct answer
11 Correct 2 ms 256 KB n = 2, 3000000000 is a correct answer
12 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
13 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
14 Correct 2 ms 256 KB n = 4, 3000000001 is a correct answer
15 Correct 2 ms 376 KB n = 4, 4000000000 is a correct answer
16 Incorrect 2 ms 376 KB n = 5, incorrect answer: jury 4000000000 vs contestant -1
17 Halted 0 ms 0 KB -

Subtask #4
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB n = 4, 80 is a correct answer
2 Correct 2 ms 256 KB n = 9, 110 is a correct answer
3 Correct 2 ms 256 KB n = 4, 21 is a correct answer
4 Correct 2 ms 380 KB n = 3, 4 is a correct answer
5 Correct 2 ms 376 KB n = 2, 62 is a correct answer
6 Correct 12 ms 256 KB n = 2, 3 is a correct answer
7 Correct 2 ms 376 KB n = 3, 29 is a correct answer
8 Correct 2 ms 256 KB n = 2, 3 is a correct answer
9 Correct 2 ms 376 KB n = 2, 3 is a correct answer
10 Correct 7 ms 376 KB n = 2, 2000000001 is a correct answer
11 Correct 2 ms 256 KB n = 2, 3000000000 is a correct answer
12 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
13 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
14 Correct 2 ms 256 KB n = 4, 3000000001 is a correct answer
15 Correct 2 ms 376 KB n = 4, 4000000000 is a correct answer
16 Incorrect 2 ms 376 KB n = 5, incorrect answer: jury 4000000000 vs contestant -1
17 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB n = 4, 80 is a correct answer
2 Correct 2 ms 256 KB n = 9, 110 is a correct answer
3 Correct 2 ms 256 KB n = 4, 21 is a correct answer
4 Correct 2 ms 380 KB n = 3, 4 is a correct answer
5 Correct 2 ms 376 KB n = 2, 62 is a correct answer
6 Correct 12 ms 256 KB n = 2, 3 is a correct answer
7 Correct 2 ms 376 KB n = 3, 29 is a correct answer
8 Correct 2 ms 256 KB n = 2, 3 is a correct answer
9 Correct 2 ms 376 KB n = 2, 3 is a correct answer
10 Correct 7 ms 376 KB n = 2, 2000000001 is a correct answer
11 Correct 2 ms 256 KB n = 2, 3000000000 is a correct answer
12 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
13 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
14 Correct 2 ms 256 KB n = 4, 3000000001 is a correct answer
15 Correct 2 ms 376 KB n = 4, 4000000000 is a correct answer
16 Incorrect 2 ms 376 KB n = 5, incorrect answer: jury 4000000000 vs contestant -1
17 Halted 0 ms 0 KB -

Subtask #6
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB n = 4, 80 is a correct answer
2 Correct 2 ms 256 KB n = 9, 110 is a correct answer
3 Correct 2 ms 256 KB n = 4, 21 is a correct answer
4 Correct 2 ms 380 KB n = 3, 4 is a correct answer
5 Correct 2 ms 376 KB n = 2, 62 is a correct answer
6 Correct 12 ms 256 KB n = 2, 3 is a correct answer
7 Correct 2 ms 376 KB n = 3, 29 is a correct answer
8 Correct 2 ms 256 KB n = 2, 3 is a correct answer
9 Correct 2 ms 376 KB n = 2, 3 is a correct answer
10 Correct 7 ms 376 KB n = 2, 2000000001 is a correct answer
11 Correct 2 ms 256 KB n = 2, 3000000000 is a correct answer
12 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
13 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
14 Correct 2 ms 256 KB n = 4, 3000000001 is a correct answer
15 Correct 2 ms 376 KB n = 4, 4000000000 is a correct answer
16 Incorrect 2 ms 376 KB n = 5, incorrect answer: jury 4000000000 vs contestant -1
17 Halted 0 ms 0 KB -

Subtask #7
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB n = 4, 80 is a correct answer
2 Correct 2 ms 256 KB n = 9, 110 is a correct answer
3 Correct 2 ms 256 KB n = 4, 21 is a correct answer
4 Correct 2 ms 380 KB n = 3, 4 is a correct answer
5 Correct 2 ms 376 KB n = 2, 62 is a correct answer
6 Correct 12 ms 256 KB n = 2, 3 is a correct answer
7 Correct 2 ms 376 KB n = 3, 29 is a correct answer
8 Correct 2 ms 256 KB n = 2, 3 is a correct answer
9 Correct 2 ms 376 KB n = 2, 3 is a correct answer
10 Correct 7 ms 376 KB n = 2, 2000000001 is a correct answer
11 Correct 2 ms 256 KB n = 2, 3000000000 is a correct answer
12 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
13 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
14 Correct 2 ms 256 KB n = 4, 3000000001 is a correct answer
15 Correct 2 ms 376 KB n = 4, 4000000000 is a correct answer
16 Incorrect 2 ms 376 KB n = 5, incorrect answer: jury 4000000000 vs contestant -1
17 Halted 0 ms 0 KB -

Subtask #8
0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB n = 4, 80 is a correct answer
2 Correct 2 ms 256 KB n = 9, 110 is a correct answer
3 Correct 2 ms 256 KB n = 4, 21 is a correct answer
4 Correct 2 ms 380 KB n = 3, 4 is a correct answer
5 Correct 2 ms 376 KB n = 2, 62 is a correct answer
6 Correct 12 ms 256 KB n = 2, 3 is a correct answer
7 Correct 2 ms 376 KB n = 3, 29 is a correct answer
8 Correct 2 ms 256 KB n = 2, 3 is a correct answer
9 Correct 2 ms 376 KB n = 2, 3 is a correct answer
10 Correct 7 ms 376 KB n = 2, 2000000001 is a correct answer
11 Correct 2 ms 256 KB n = 2, 3000000000 is a correct answer
12 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
13 Correct 2 ms 256 KB n = 3, 3000000000 is a correct answer
14 Correct 2 ms 256 KB n = 4, 3000000001 is a correct answer
15 Correct 2 ms 376 KB n = 4, 4000000000 is a correct answer
16 Incorrect 2 ms 376 KB n = 5, incorrect answer: jury 4000000000 vs contestant -1
17 Halted 0 ms 0 KB -