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답안 #678113

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
678113 2023-01-05T08:06:40 Z qwerasdfzxcl 3단 점프 (JOI19_jumps) C++17
100 / 100
 948 ms 67856 KB 
#include <bits/stdc++.h>

typedef long long ll;
using namespace std;
int a[500500], L[500500], R[500500], ans[500500];
vector<int> V[500500];

struct Seg{
    int tree[1101000], tree2[1101000], lazy[1101000];
    void init(int i, int l, int r){
        lazy[i] = 0;
        if (l==r){
            tree[i] = tree2[i] = a[l];
            return;
        }
        int m = (l+r)>>1;
        init(i<<1, l, m); init(i<<1|1, m+1, r);
        tree[i] = max(tree[i<<1], tree[i<<1|1]);
        tree2[i] = max(tree2[i<<1], tree2[i<<1|1]);
    }
    void propagate(int i, int l, int r){
        tree[i] = max(tree[i], tree2[i] + lazy[i]);
        if (l!=r){
            lazy[i<<1] = max(lazy[i<<1], lazy[i]);
            lazy[i<<1|1] = max(lazy[i<<1|1], lazy[i]);
        }
        lazy[i] = 0;
    }
    void update(int i, int l, int r, int s, int e, int x){
        propagate(i, l, r);
        if (r<s || e<l) return;
        if (s<=l && r<=e){
            lazy[i] = max(lazy[i], x);
            propagate(i, l, r);
            return;
        }

        int m = (l+r)>>1;
        update(i<<1, l, m, s, e, x);
        update(i<<1|1, m+1, r, s, e, x);
        tree[i] = max(tree[i<<1], tree[i<<1|1]);
    }
    int query(int i, int l, int r, int s, int e){
        propagate(i, l, r);
        if (r<s || e<l) return 0;
        if (s<=l && r<=e) return tree[i];
        int m = (l+r)>>1;
        return max(query(i<<1, l, m, s, e), query(i<<1|1, m+1, r, s, e));
    }
}tree;

bool cmp(int i, int j){return L[i] > L[j];}

int main(){
    int n;
    scanf("%d", &n);
    for (int i=1;i<=n;i++) scanf("%d", a+i);

    vector<int> st;
    for (int i=1;i<=n;i++){
        while(!st.empty() && a[st.back()] <= a[i]){
            V[st.back()].push_back(i);
            st.pop_back();
        }
        if (!st.empty()) V[st.back()].push_back(i);
        st.push_back(i);
    }

    int q;
    vector<int> I;
    scanf("%d", &q);
    for (int i=1;i<=q;i++){
        scanf("%d %d", L+i, R+i);
        I.push_back(i);
    }

    sort(I.begin(), I.end(), cmp);
    tree.init(1, 1, n);

    int pt = n+1;
    for (auto &i:I){
        while(L[i] < pt){
            --pt;
            for (auto &r:V[pt]){
                tree.update(1, 1, n, r*2-pt, n, a[pt] + a[r]);
                //printf("update (%d %d): %d %d %d\n", pt, r, r*2-pt, n, a[pt] + a[r]);
                //if (pt==3 && r==4) printf("%d\n", tree.query(1, 1, n, 5, 5));
            }
        }

        //printf("pt = %d -> %d %d\n", pt, L[i], R[i]);

        ans[i] = tree.query(1, 1, n, L[i]+2, R[i]);
    }

    for (int i=1;i<=q;i++) printf("%d\n", ans[i]);
    return 0;
}

Compilation message

jumps.cpp: In function 'int main()':
jumps.cpp:56:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
jumps.cpp:57:33: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |     for (int i=1;i<=n;i++) scanf("%d", a+i);
      |                            ~~~~~^~~~~~~~~~~
jumps.cpp:71:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
jumps.cpp:73:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   73 |         scanf("%d %d", L+i, R+i);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 12072 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 6 ms 12068 KB Output is correct
4 Correct 6 ms 12068 KB Output is correct
5 Correct 6 ms 12116 KB Output is correct
6 Correct 6 ms 12064 KB Output is correct
7 Correct 7 ms 12068 KB Output is correct
8 Correct 6 ms 11988 KB Output is correct
9 Correct 6 ms 12116 KB Output is correct
10 Correct 6 ms 12116 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 12072 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 6 ms 12068 KB Output is correct
4 Correct 6 ms 12068 KB Output is correct
5 Correct 6 ms 12116 KB Output is correct
6 Correct 6 ms 12064 KB Output is correct
7 Correct 7 ms 12068 KB Output is correct
8 Correct 6 ms 11988 KB Output is correct
9 Correct 6 ms 12116 KB Output is correct
10 Correct 6 ms 12116 KB Output is correct
11 Correct 348 ms 29720 KB Output is correct
12 Correct 333 ms 30004 KB Output is correct
13 Correct 334 ms 30056 KB Output is correct
14 Correct 344 ms 30112 KB Output is correct
15 Correct 350 ms 30112 KB Output is correct
16 Correct 387 ms 29420 KB Output is correct
17 Correct 354 ms 29360 KB Output is correct
18 Correct 362 ms 29328 KB Output is correct
19 Correct 327 ms 29924 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 158 ms 25572 KB Output is correct
2 Correct 82 ms 25688 KB Output is correct
3 Correct 86 ms 26544 KB Output is correct
4 Correct 141 ms 25892 KB Output is correct
5 Correct 141 ms 25960 KB Output is correct
6 Correct 151 ms 25924 KB Output is correct
7 Correct 150 ms 26484 KB Output is correct
8 Correct 138 ms 26484 KB Output is correct
9 Correct 136 ms 26772 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 12072 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 6 ms 12068 KB Output is correct
4 Correct 6 ms 12068 KB Output is correct
5 Correct 6 ms 12116 KB Output is correct
6 Correct 6 ms 12064 KB Output is correct
7 Correct 7 ms 12068 KB Output is correct
8 Correct 6 ms 11988 KB Output is correct
9 Correct 6 ms 12116 KB Output is correct
10 Correct 6 ms 12116 KB Output is correct
11 Correct 348 ms 29720 KB Output is correct
12 Correct 333 ms 30004 KB Output is correct
13 Correct 334 ms 30056 KB Output is correct
14 Correct 344 ms 30112 KB Output is correct
15 Correct 350 ms 30112 KB Output is correct
16 Correct 387 ms 29420 KB Output is correct
17 Correct 354 ms 29360 KB Output is correct
18 Correct 362 ms 29328 KB Output is correct
19 Correct 327 ms 29924 KB Output is correct
20 Correct 158 ms 25572 KB Output is correct
21 Correct 82 ms 25688 KB Output is correct
22 Correct 86 ms 26544 KB Output is correct
23 Correct 141 ms 25892 KB Output is correct
24 Correct 141 ms 25960 KB Output is correct
25 Correct 151 ms 25924 KB Output is correct
26 Correct 150 ms 26484 KB Output is correct
27 Correct 138 ms 26484 KB Output is correct
28 Correct 136 ms 26772 KB Output is correct
29 Correct 948 ms 66520 KB Output is correct
30 Correct 785 ms 65888 KB Output is correct
31 Correct 740 ms 67856 KB Output is correct
32 Correct 907 ms 66544 KB Output is correct
33 Correct 902 ms 66416 KB Output is correct
34 Correct 943 ms 64204 KB Output is correct
35 Correct 919 ms 63820 KB Output is correct
36 Correct 900 ms 63808 KB Output is correct
37 Correct 902 ms 65232 KB Output is correct
38 Correct 778 ms 66408 KB Output is correct
39 Correct 747 ms 66420 KB Output is correct
40 Correct 734 ms 63304 KB Output is correct
41 Correct 739 ms 62588 KB Output is correct
42 Correct 734 ms 62684 KB Output is correct
43 Correct 730 ms 64384 KB Output is correct
44 Correct 779 ms 66456 KB Output is correct
45 Correct 765 ms 66460 KB Output is correct
46 Correct 749 ms 63456 KB Output is correct
47 Correct 743 ms 63056 KB Output is correct
48 Correct 728 ms 62932 KB Output is correct
49 Correct 778 ms 64896 KB Output is correct
50 Correct 846 ms 66476 KB Output is correct
51 Correct 792 ms 66504 KB Output is correct
52 Correct 778 ms 64152 KB Output is correct
53 Correct 780 ms 63960 KB Output is correct
54 Correct 835 ms 63748 KB Output is correct
55 Correct 816 ms 65624 KB Output is correct