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답안 #165475

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
165475 2019-11-27T11:09:19 Z Segtree Shortcut (IOI16_shortcut) C++14
0 / 100
 8 ms 376 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 3010
ll r[N],d[N],n,cost;
ll solve(ll p,ll q){
    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;i<=q;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]));
    }
    vector<int> rs,ds;
    for(int i=p;i<=q;i++){
	rs.push_back(r[i]-r[p]);
	ds.push_back(d[i]);
    }
    for(int i=p;i<=q;i++){
	rs.push_back(r[i]-r[p]+cost+r[q]-r[p]);
	ds.push_back(d[i]);
    }
    ll key=cost+r[q]-r[p];
    int j=0;
    deque<pair<ll,ll> > Q;
    for(int i=0;i<rs.size()/2;i++){
	while(!Q.empty()&&Q.front().second<=i)Q.pop_front();
	for(;(rs[j]-rs[i])*2<=key;j++){
	    while(!Q.empty()&&Q.back().first<=rs[j]+ds[j]){
		Q.pop_back();
	    }
	    Q.push_back(make_pair(rs[j]+ds[j],i));
	}
	chmax(ans,Q.front().first-rs[i]+ds[i]);
    }
    //cout<<"#"<<p<<" "<<q<<" "<<ans<<endl;
    return ans;
}
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 p=0;p<n;p++)for(int q=p+1;q<n;q++){
	chmin(ans,solve(p,q));
    }
    return ans;
}

Compilation message

shortcut.cpp: In function 'll solve(ll, ll)':
shortcut.cpp:38:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<rs.size()/2;i++){
                 ~^~~~~~~~~~~~

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 8 ms 376 KB n = 9, 110 is a correct answer
3 Correct 2 ms 376 KB n = 4, 21 is a correct answer
4 Incorrect 2 ms 276 KB n = 3, incorrect answer: jury 4 vs contestant 5

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 8 ms 376 KB n = 9, 110 is a correct answer
3 Correct 2 ms 376 KB n = 4, 21 is a correct answer
4 Incorrect 2 ms 276 KB n = 3, incorrect answer: jury 4 vs contestant 5

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 8 ms 376 KB n = 9, 110 is a correct answer
3 Correct 2 ms 376 KB n = 4, 21 is a correct answer
4 Incorrect 2 ms 276 KB n = 3, incorrect answer: jury 4 vs contestant 5

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 8 ms 376 KB n = 9, 110 is a correct answer
3 Correct 2 ms 376 KB n = 4, 21 is a correct answer
4 Incorrect 2 ms 276 KB n = 3, incorrect answer: jury 4 vs contestant 5

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 8 ms 376 KB n = 9, 110 is a correct answer
3 Correct 2 ms 376 KB n = 4, 21 is a correct answer
4 Incorrect 2 ms 276 KB n = 3, incorrect answer: jury 4 vs contestant 5

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 8 ms 376 KB n = 9, 110 is a correct answer
3 Correct 2 ms 376 KB n = 4, 21 is a correct answer
4 Incorrect 2 ms 276 KB n = 3, incorrect answer: jury 4 vs contestant 5

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 8 ms 376 KB n = 9, 110 is a correct answer
3 Correct 2 ms 376 KB n = 4, 21 is a correct answer
4 Incorrect 2 ms 276 KB n = 3, incorrect answer: jury 4 vs contestant 5

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 8 ms 376 KB n = 9, 110 is a correct answer
3 Correct 2 ms 376 KB n = 4, 21 is a correct answer
4 Incorrect 2 ms 276 KB n = 3, incorrect answer: jury 4 vs contestant 5