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답안 #21040

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
21040 2017-04-01T06:39:41 Z ainta Long Mansion (JOI17_long_mansion) C++14
100 / 100
 1363 ms 65844 KB 
#include<cstdio>
#include<algorithm>
#include<vector>
#include<set>
#define SZ 524288
using namespace std;
vector<int>E[501000];
int C[501000], L[501000], R[501000], LL[501000], RR[501000];
int n, Q;
set<int>Set;
struct point{
    int x, num;
    bool operator<(const point &p)const{
        return x<p.x;
    }
}ord[501000];
struct Tree{
    int Mn, Mx;
}IT[SZ+SZ];
Tree Get(int b, int e){
    b += SZ, e += SZ;
    Tree r = {n+1,0};
    while(b<=e){
        r.Mn = min(r.Mn,min(IT[b].Mn,IT[e].Mn));
        r.Mx = max(r.Mx,max(IT[b].Mx,IT[e].Mx));
        b=(b+1)>>1,e=(e-1)>>1;
    }
    return r;
}
int main(){
    int i, a, b;
    scanf("%d",&n);
    for(i=1;i<n;i++)scanf("%d",&C[i]);
    for(i=1;i<=n;i++){
        scanf("%d",&a);
        while(a--){
            scanf("%d",&b);
            E[b].push_back(i);
        }
    }
    for(i=1;i<=n;i++){
        a = C[i-1];
        if(E[a].empty()) L[i] = n+1;
        else{
            int t = lower_bound(E[a].begin(),E[a].end(),i)-E[a].begin();
            if(t == E[a].size())L[i] = n+1;
            else L[i] = E[a][t];
        }
    }
    for(i=n;i>=1;i--){
        a = C[i];
        if(E[a].empty()) R[i] = 0;
        else{
            int t = lower_bound(E[a].begin(),E[a].end(),i+1)-E[a].begin();
            if(t == 0)R[i] = 0;
            else R[i] = E[a][t-1];
        }
    }
    for(i=1;i<=n;i++){
        ord[i].x=L[i],ord[i].num = i;
        Set.insert(i);
    }
    sort(ord+1,ord+n+1);
    int pv = 1;
    for(i=1;i<=n;i++){
        LL[i] = n+1;
        while(pv<=n && ord[pv].x <= i){
            Set.erase(ord[pv].num);
            pv++;
        }
        if(Set.empty())continue;
        auto it = Set.lower_bound(R[i]+1);
        if(it!=Set.end() && (*it) <= i){
            LL[i] = *it;
        }
    }
    Set.clear();
    for(i=1;i<=n;i++){
        ord[i].x=R[i],ord[i].num = i;
        Set.insert(i);
    }
    sort(ord+1,ord+n+1);
    pv = n;
    for(i=n;i>=1;i--){
        RR[i] = 0;
        while(pv>=1 && ord[pv].x >= i){
            Set.erase(ord[pv].num);
            pv--;
        }
        if(Set.empty())continue;
        auto it = Set.lower_bound(L[i]);
        if(it!=Set.begin()){
            it--;
            if((*it) >= i)RR[i] = *it;
        }
    }
    scanf("%d",&Q);
    for(i=1;i<=n;i++){
        a = SZ+i;
        IT[a].Mn = LL[i], IT[a].Mx = RR[i];
        while(a!=1){
            a>>=1;
            IT[a].Mn = min(IT[a+a].Mn,IT[a+a+1].Mn);
            IT[a].Mx = max(IT[a+a].Mx,IT[a+a+1].Mx);
        }
    }
    while(Q--){
        scanf("%d%d",&a,&b);
        if(a<b){
            if(Get(a,b-1).Mn <= a)puts("NO");
            else puts("YES");
        }
        else{
            if(Get(b+1,a).Mx >= a)puts("NO");
            else puts("YES");
        }
    }
}

Compilation message

long_mansion.cpp: In function 'int main()':
long_mansion.cpp:46:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if(t == E[a].size())L[i] = n+1;
                  ^
long_mansion.cpp:32:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
                   ^
long_mansion.cpp:33:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(i=1;i<n;i++)scanf("%d",&C[i]);
                                      ^
long_mansion.cpp:35:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&a);
                       ^
long_mansion.cpp:37:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d",&b);
                           ^
long_mansion.cpp:97:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&Q);
                   ^
long_mansion.cpp:108:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&a,&b);
                            ^

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 34944 KB Output is correct
2 Correct 9 ms 34944 KB Output is correct
3 Correct 6 ms 35076 KB Output is correct
4 Correct 9 ms 34944 KB Output is correct
5 Correct 3 ms 34944 KB Output is correct
6 Correct 6 ms 34944 KB Output is correct
7 Correct 3 ms 34944 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 34944 KB Output is correct
2 Correct 9 ms 34944 KB Output is correct
3 Correct 6 ms 35076 KB Output is correct
4 Correct 9 ms 34944 KB Output is correct
5 Correct 3 ms 34944 KB Output is correct
6 Correct 6 ms 34944 KB Output is correct
7 Correct 3 ms 34944 KB Output is correct
8 Correct 169 ms 34944 KB Output is correct
9 Correct 173 ms 34944 KB Output is correct
10 Correct 163 ms 34944 KB Output is correct
11 Correct 186 ms 35076 KB Output is correct
12 Correct 153 ms 34944 KB Output is correct
13 Correct 156 ms 34944 KB Output is correct
14 Correct 146 ms 34944 KB Output is correct
15 Correct 163 ms 34944 KB Output is correct
16 Correct 143 ms 34944 KB Output is correct
17 Correct 166 ms 34944 KB Output is correct
18 Correct 159 ms 34944 KB Output is correct
19 Correct 156 ms 34944 KB Output is correct
20 Correct 159 ms 34944 KB Output is correct
21 Correct 156 ms 34944 KB Output is correct
22 Correct 146 ms 34944 KB Output is correct
23 Correct 163 ms 34944 KB Output is correct
24 Correct 153 ms 34944 KB Output is correct
25 Correct 129 ms 34944 KB Output is correct
26 Correct 149 ms 34944 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 406 ms 42084 KB Output is correct
2 Correct 459 ms 41480 KB Output is correct
3 Correct 379 ms 42096 KB Output is correct
4 Correct 413 ms 41916 KB Output is correct
5 Correct 379 ms 41748 KB Output is correct
6 Correct 349 ms 40744 KB Output is correct
7 Correct 329 ms 40760 KB Output is correct
8 Correct 313 ms 40800 KB Output is correct
9 Correct 329 ms 40752 KB Output is correct
10 Correct 326 ms 40788 KB Output is correct
11 Correct 339 ms 40748 KB Output is correct

Subtask #4
75.0 / 75.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 34944 KB Output is correct
2 Correct 9 ms 34944 KB Output is correct
3 Correct 6 ms 35076 KB Output is correct
4 Correct 9 ms 34944 KB Output is correct
5 Correct 3 ms 34944 KB Output is correct
6 Correct 6 ms 34944 KB Output is correct
7 Correct 3 ms 34944 KB Output is correct
8 Correct 169 ms 34944 KB Output is correct
9 Correct 173 ms 34944 KB Output is correct
10 Correct 163 ms 34944 KB Output is correct
11 Correct 186 ms 35076 KB Output is correct
12 Correct 153 ms 34944 KB Output is correct
13 Correct 156 ms 34944 KB Output is correct
14 Correct 146 ms 34944 KB Output is correct
15 Correct 163 ms 34944 KB Output is correct
16 Correct 143 ms 34944 KB Output is correct
17 Correct 166 ms 34944 KB Output is correct
18 Correct 159 ms 34944 KB Output is correct
19 Correct 156 ms 34944 KB Output is correct
20 Correct 159 ms 34944 KB Output is correct
21 Correct 156 ms 34944 KB Output is correct
22 Correct 146 ms 34944 KB Output is correct
23 Correct 163 ms 34944 KB Output is correct
24 Correct 153 ms 34944 KB Output is correct
25 Correct 129 ms 34944 KB Output is correct
26 Correct 149 ms 34944 KB Output is correct
27 Correct 406 ms 42084 KB Output is correct
28 Correct 459 ms 41480 KB Output is correct
29 Correct 379 ms 42096 KB Output is correct
30 Correct 413 ms 41916 KB Output is correct
31 Correct 379 ms 41748 KB Output is correct
32 Correct 349 ms 40744 KB Output is correct
33 Correct 329 ms 40760 KB Output is correct
34 Correct 313 ms 40800 KB Output is correct
35 Correct 329 ms 40752 KB Output is correct
36 Correct 326 ms 40788 KB Output is correct
37 Correct 339 ms 40748 KB Output is correct
38 Correct 1349 ms 56328 KB Output is correct
39 Correct 1363 ms 60816 KB Output is correct
40 Correct 919 ms 51576 KB Output is correct
41 Correct 1153 ms 60372 KB Output is correct
42 Correct 386 ms 41148 KB Output is correct
43 Correct 359 ms 40884 KB Output is correct
44 Correct 566 ms 47616 KB Output is correct
45 Correct 569 ms 47880 KB Output is correct
46 Correct 596 ms 48012 KB Output is correct
47 Correct 363 ms 41280 KB Output is correct
48 Correct 356 ms 40752 KB Output is correct
49 Correct 586 ms 46956 KB Output is correct
50 Correct 629 ms 47616 KB Output is correct
51 Correct 676 ms 48408 KB Output is correct
52 Correct 463 ms 50184 KB Output is correct
53 Correct 669 ms 57804 KB Output is correct
54 Correct 836 ms 65844 KB Output is correct
55 Correct 649 ms 57828 KB Output is correct