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답안 #515549

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
515549 2022-01-19T08:36:58 Z 79brue 3단 점프 (JOI19_jumps) C++14
46 / 100
 4000 ms 139220 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int n, q;
int arr[500002];
int DP[5002][5002];
int DPmax[5002][5002];
int sparse[500002][20];

void init(){
    for(int i=1; i<=n; i++) sparse[i][0] = arr[i];
    for(int d=1; d<20; d++){
        for(int i=1; i<=n; i++) sparse[i][d] = max(sparse[i][d-1], (i+(1<<(d-1))) > n ? 0 : sparse[i+(1<<(d-1))][d-1]);
    }
}

int query(int l, int r){
    int d = 31-__builtin_clz(r-l+1);
    return max(sparse[l][d], sparse[r-(1<<d)+1][d]);
}

void solveSmall(){
    for(int i=1; i<=n; i++){
        DPmax[i][i] = arr[i];
        for(int j=i+1; j<=n; j++){
            DPmax[i][j] = max(DPmax[i][j-1], arr[j]);
        }
    }
    for(int i=1; i<=n-2; i++) DP[i][i+2] = arr[i] + arr[i+1] + arr[i+2];
    for(int d=3; d<n; d++){
        for(int i=1; i+d<=n; i++){
            int j = i+d;
            DP[i][j] = max({DP[i][j-1], DP[i+1][j], arr[i] + arr[j] + DPmax[i+1][(i+j)/2]});
        }
    }

    scanf("%d", &q);
    while(q--){
        int l, r;
        scanf("%d %d", &l, &r);
        printf("%d\n", DP[l][r]);
    }
    exit(0);
}

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

    if(n <= 5000) solveSmall();

    init();

    scanf("%d", &q);
    while(q--){
        int l, r;
        scanf("%d %d", &l, &r);

        priority_queue<pair<int, int>, vector<pair<int, int> >, greater<pair<int, int> > > pq;
        vector<pair<int, int> > vec;

        vec.push_back(make_pair(arr[r], r));
        vec.push_back(make_pair(arr[r-1], r-1));
        for(auto p: vec) pq.push(p);

        int ans = 0;
        for(int a=r-2; a>=l; a--){
            for(pair<int, int> p: vec){
                int b = p.second;
                if(b-a>1) ans = max(ans, arr[a] + arr[b] + query(a+1, (a+b)/2));
                if(b*2<=a+r) ans = max(ans, arr[a] + arr[b] + query(b*2-a, r));
            }

            pq.push(make_pair(arr[a], a));
            vec.push_back(make_pair(arr[a], a));

            if(pq.size() >= 5){
                vec.erase(find(vec.begin(), vec.end(), pq.top()));
                pq.pop();
            }
        }

        printf("%d\n", ans);
    }
}

Compilation message

jumps.cpp: In function 'void solveSmall()':
jumps.cpp:40:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
jumps.cpp:43:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |         scanf("%d %d", &l, &r);
      |         ~~~~~^~~~~~~~~~~~~~~~~
jumps.cpp: In function 'int main()':
jumps.cpp:50:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
jumps.cpp:51:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |     for(int i=1; i<=n; i++) scanf("%d", &arr[i]);
      |                             ~~~~~^~~~~~~~~~~~~~~
jumps.cpp:57:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
jumps.cpp:60:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |         scanf("%d %d", &l, &r);
      |         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 1100 KB Output is correct
3 Correct 1 ms 1100 KB Output is correct
4 Correct 1 ms 1100 KB Output is correct
5 Correct 1 ms 1100 KB Output is correct
6 Correct 1 ms 1100 KB Output is correct
7 Correct 1 ms 1100 KB Output is correct
8 Correct 1 ms 1100 KB Output is correct
9 Correct 1 ms 1100 KB Output is correct
10 Correct 1 ms 1100 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 1100 KB Output is correct
3 Correct 1 ms 1100 KB Output is correct
4 Correct 1 ms 1100 KB Output is correct
5 Correct 1 ms 1100 KB Output is correct
6 Correct 1 ms 1100 KB Output is correct
7 Correct 1 ms 1100 KB Output is correct
8 Correct 1 ms 1100 KB Output is correct
9 Correct 1 ms 1100 KB Output is correct
10 Correct 1 ms 1100 KB Output is correct
11 Correct 507 ms 139220 KB Output is correct
12 Correct 461 ms 139120 KB Output is correct
13 Correct 472 ms 139200 KB Output is correct
14 Correct 479 ms 139168 KB Output is correct
15 Correct 446 ms 139184 KB Output is correct
16 Correct 488 ms 138496 KB Output is correct
17 Correct 505 ms 138652 KB Output is correct
18 Correct 465 ms 138556 KB Output is correct
19 Correct 501 ms 139060 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 76 ms 16716 KB Output is correct
2 Correct 67 ms 16696 KB Output is correct
3 Correct 70 ms 16716 KB Output is correct
4 Correct 87 ms 16724 KB Output is correct
5 Correct 70 ms 16720 KB Output is correct
6 Correct 67 ms 16728 KB Output is correct
7 Correct 64 ms 16716 KB Output is correct
8 Correct 66 ms 16720 KB Output is correct
9 Correct 66 ms 16716 KB Output is correct

Subtask #4
0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 1100 KB Output is correct
3 Correct 1 ms 1100 KB Output is correct
4 Correct 1 ms 1100 KB Output is correct
5 Correct 1 ms 1100 KB Output is correct
6 Correct 1 ms 1100 KB Output is correct
7 Correct 1 ms 1100 KB Output is correct
8 Correct 1 ms 1100 KB Output is correct
9 Correct 1 ms 1100 KB Output is correct
10 Correct 1 ms 1100 KB Output is correct
11 Correct 507 ms 139220 KB Output is correct
12 Correct 461 ms 139120 KB Output is correct
13 Correct 472 ms 139200 KB Output is correct
14 Correct 479 ms 139168 KB Output is correct
15 Correct 446 ms 139184 KB Output is correct
16 Correct 488 ms 138496 KB Output is correct
17 Correct 505 ms 138652 KB Output is correct
18 Correct 465 ms 138556 KB Output is correct
19 Correct 501 ms 139060 KB Output is correct
20 Correct 76 ms 16716 KB Output is correct
21 Correct 67 ms 16696 KB Output is correct
22 Correct 70 ms 16716 KB Output is correct
23 Correct 87 ms 16724 KB Output is correct
24 Correct 70 ms 16720 KB Output is correct
25 Correct 67 ms 16728 KB Output is correct
26 Correct 64 ms 16716 KB Output is correct
27 Correct 66 ms 16720 KB Output is correct
28 Correct 66 ms 16716 KB Output is correct
29 Execution timed out 4074 ms 41256 KB Time limit exceeded
30 Halted 0 ms 0 KB -