oj.uz

Submission #515550

# Submission time Handle Problem Language Result Execution time Memory
515550 2022-01-19T08:37:19 Z 79brue Triple Jump (JOI19_jumps) C++14
46 / 100
 4000 ms 139216 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() >= 4){
                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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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 440 ms 139180 KB Output is correct
12 Correct 440 ms 139184 KB Output is correct
13 Correct 447 ms 139076 KB Output is correct
14 Correct 437 ms 139204 KB Output is correct
15 Correct 441 ms 139216 KB Output is correct
16 Correct 446 ms 138476 KB Output is correct
17 Correct 433 ms 138452 KB Output is correct
18 Correct 469 ms 138560 KB Output is correct
19 Correct 446 ms 139192 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 67 ms 16672 KB Output is correct
2 Correct 67 ms 16708 KB Output is correct
3 Correct 69 ms 16716 KB Output is correct
4 Correct 70 ms 16684 KB Output is correct
5 Correct 71 ms 16656 KB Output is correct
6 Correct 60 ms 16720 KB Output is correct
7 Correct 61 ms 16736 KB Output is correct
8 Correct 61 ms 16680 KB Output is correct
9 Correct 63 ms 16680 KB Output is correct

Subtask #4
0 / 54.0

# Verdict Execution time Memory 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 440 ms 139180 KB Output is correct
12 Correct 440 ms 139184 KB Output is correct
13 Correct 447 ms 139076 KB Output is correct
14 Correct 437 ms 139204 KB Output is correct
15 Correct 441 ms 139216 KB Output is correct
16 Correct 446 ms 138476 KB Output is correct
17 Correct 433 ms 138452 KB Output is correct
18 Correct 469 ms 138560 KB Output is correct
19 Correct 446 ms 139192 KB Output is correct
20 Correct 67 ms 16672 KB Output is correct
21 Correct 67 ms 16708 KB Output is correct
22 Correct 69 ms 16716 KB Output is correct
23 Correct 70 ms 16684 KB Output is correct
24 Correct 71 ms 16656 KB Output is correct
25 Correct 60 ms 16720 KB Output is correct
26 Correct 61 ms 16736 KB Output is correct
27 Correct 61 ms 16680 KB Output is correct
28 Correct 63 ms 16680 KB Output is correct
29 Execution timed out 4075 ms 41376 KB Time limit exceeded
30 Halted 0 ms 0 KB -