oj.uz

Submission #290441

# Submission time Handle Problem Language Result Execution time Memory
290441 2020-09-03T19:39:47 Z A02 Ancient Books (IOI17_books) C++14
70 / 100
 2000 ms 12520 KB 
#include <bits/stdc++.h>
#include "books.h"

using namespace std;

long long minimum_walk(vector<int> p, int s) {

    vector<int> np;
    long long book_total = 0;

    int left_start = p.size();
    int right_start = 0;
    for (int i = 0; i < p.size(); i++){
        if (p[i] != i){
            left_start = min(left_start, i);
        }
    }
    for (int i = p.size() - 1; i >= 0; i--){
        if (p[i] != i){
            right_start = max(right_start, i);
        }
    }



    if (left_start == p.size()){
        return 0;
    }

    if (s < left_start){
        s = 0;
        book_total += 2 * (left_start - s);
    } else {
        s -= left_start;
    }

    right_start -= left_start;

    if (s > right_start){
        s = right_start;
        book_total += 2 * (s - (right_start));

    }

    for (int i = left_start; i <= right_start + left_start; i++){
        np.push_back(p[i] - left_start);
        //cout << np[i - left_start] << 'a' << endl;
    }

    p = np;

	int n = p.size();

	for (int i = 0; i < n; i++){
        book_total += max(p[i] - i, i - p[i]);
	}

//	if (s == 0){
//        int current_region_max = 0;
//        int prev_visited = 0;
//        for (int i = 0; i < n; i++){
//            if (current_region_max < i && p[i] != i){
//                book_total += 2 * (i - current_region_max);
//            }
//            if (p[i] != i){
//                current_region_max = max(current_region_max, i);
//                current_region_max = max(current_region_max, p[i]);
//            }
//        }
//	}

    int left_frontier = s;
    int right_frontier = s;
    long long left_cost = 0;
    long long right_cost = 0;

    bool is_joined = true;

    int v_l_frontier = s;
    int v_r_frontier = s;

    if (p[s] < s){
        left_frontier = p[s];
    }
    if (p[s] > s){
        right_frontier = p[s];
    }
    //cout << left_frontier << ' ' << right_frontier << endl;
    while(left_frontier < v_l_frontier || right_frontier > v_r_frontier){
        if (right_frontier > v_r_frontier){

            for (int i = v_r_frontier + 1; i <= right_frontier; i++){
                v_r_frontier++;
                if (p[i] > right_frontier){
                    right_frontier = p[i];
                }
                if (p[i] < left_frontier){
                    left_frontier = p[i];
                }
            }
        }

        if (left_frontier < v_l_frontier){
            for (int i = v_l_frontier - 1; i >= left_frontier; i--){
                v_l_frontier--;
                if (p[i] > right_frontier){
                    right_frontier = p[i];
                }
                if (p[i] < left_frontier){
                    left_frontier = p[i];
                }
            }

        }
    }


    while (left_frontier > 0 || right_frontier < n - 1){
        //cout << left_frontier << 'x' << right_frontier << endl;
        is_joined = false;

        if (right_frontier < n - 1){
            int original_left_frontier = left_frontier;
            right_frontier++;
            right_cost++;

            int left_visited_frontier = left_frontier;
            int right_visited_frontier = right_frontier - 1;
            //cout << left_frontier << 'r' << right_frontier << endl;
            while(left_frontier < left_visited_frontier || right_frontier > right_visited_frontier){
                //cout << left_frontier << 's' << right_frontier << endl;
                if (right_frontier > right_visited_frontier){

                    for (int i = right_visited_frontier + 1; i <= right_frontier; i++){
                        right_visited_frontier++;
                        if (p[i] > right_frontier){
                            right_frontier = p[i];
                        }
                        if (p[i] < left_frontier){
                            left_frontier = p[i];
                        }
                    }
                }

                if (left_frontier < left_visited_frontier){
                    for (int i = left_visited_frontier - 1; i >= left_frontier; i--){
                        left_visited_frontier--;
                        if (p[i] > right_frontier){
                            right_frontier = p[i];
                        }
                        if (p[i] < left_frontier){
                            left_frontier = p[i];
                        }
                    }

                }
            }

            if (original_left_frontier != left_frontier){
                is_joined = true;
            }
        }
        //cout << 'a' << endl;
        if (!is_joined && left_frontier > 0){

            int original_right_frontier = right_frontier;
            left_frontier--;
            left_cost++;

            int left_visited_frontier = left_frontier + 1;
            int right_visited_frontier = right_frontier;

            while(left_frontier < left_visited_frontier || right_frontier > right_visited_frontier){

                if (right_frontier > right_visited_frontier){
                    right_visited_frontier++;
                    for (int i = right_visited_frontier + 1; i <= right_frontier; i++){
                        if (p[i] > right_frontier){
                            right_frontier = p[i];
                        }
                        if (p[i] < left_frontier){
                            left_frontier = p[i];
                        }
                    }
                }

                if (left_frontier < left_visited_frontier){
                    for (int i = left_visited_frontier - 1; i >= left_frontier; i--){
                        left_visited_frontier--;
                        if (p[i] > right_frontier){
                            right_frontier = p[i];
                        }
                        if (p[i] < left_frontier){
                            left_frontier = p[i];
                        }
                    }

                }
            }

            if (original_right_frontier != right_frontier){
                is_joined = true;
            }

        }
        //cout << 'b' << endl;
        if (is_joined){
            book_total += 2 * right_cost;
            left_cost = 0;
            right_cost = 0;
        }

    }

    book_total += 2 * (left_cost + right_cost);

	return book_total;

}

Compilation message

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:13:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     for (int i = 0; i < p.size(); i++){
      |                     ~~^~~~~~~~~~
books.cpp:26:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     if (left_start == p.size()){
      |         ~~~~~~~~~~~^~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 0 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 1 ms 256 KB Output is correct
17 Correct 0 ms 256 KB Output is correct
18 Correct 0 ms 256 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 0 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 1 ms 256 KB Output is correct
17 Correct 0 ms 256 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 0 ms 256 KB Output is correct
21 Correct 0 ms 256 KB Output is correct
22 Correct 1 ms 288 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 0 ms 256 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 0 ms 384 KB Output is correct
27 Correct 1 ms 256 KB Output is correct
28 Correct 0 ms 384 KB Output is correct
29 Correct 0 ms 384 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 0 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 1 ms 256 KB Output is correct
17 Correct 0 ms 256 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 0 ms 256 KB Output is correct
21 Correct 0 ms 256 KB Output is correct
22 Correct 1 ms 288 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 0 ms 256 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 0 ms 384 KB Output is correct
27 Correct 1 ms 256 KB Output is correct
28 Correct 0 ms 384 KB Output is correct
29 Correct 0 ms 384 KB Output is correct
30 Correct 180 ms 12340 KB Output is correct
31 Correct 181 ms 12392 KB Output is correct
32 Correct 156 ms 8184 KB Output is correct
33 Correct 174 ms 12392 KB Output is correct
34 Correct 177 ms 12396 KB Output is correct
35 Correct 172 ms 12392 KB Output is correct
36 Correct 163 ms 12392 KB Output is correct
37 Correct 167 ms 12520 KB Output is correct
38 Correct 172 ms 12392 KB Output is correct
39 Correct 177 ms 12392 KB Output is correct
40 Correct 174 ms 12464 KB Output is correct
41 Correct 179 ms 12396 KB Output is correct
42 Correct 177 ms 12392 KB Output is correct
43 Correct 170 ms 12336 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 256 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 256 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 0 ms 384 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 1 ms 256 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 1 ms 384 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 0 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 1 ms 256 KB Output is correct
17 Correct 0 ms 256 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 0 ms 256 KB Output is correct
21 Correct 0 ms 256 KB Output is correct
22 Correct 1 ms 288 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 0 ms 256 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 0 ms 384 KB Output is correct
27 Correct 1 ms 256 KB Output is correct
28 Correct 0 ms 384 KB Output is correct
29 Correct 0 ms 384 KB Output is correct
30 Correct 180 ms 12340 KB Output is correct
31 Correct 181 ms 12392 KB Output is correct
32 Correct 156 ms 8184 KB Output is correct
33 Correct 174 ms 12392 KB Output is correct
34 Correct 177 ms 12396 KB Output is correct
35 Correct 172 ms 12392 KB Output is correct
36 Correct 163 ms 12392 KB Output is correct
37 Correct 167 ms 12520 KB Output is correct
38 Correct 172 ms 12392 KB Output is correct
39 Correct 177 ms 12392 KB Output is correct
40 Correct 174 ms 12464 KB Output is correct
41 Correct 179 ms 12396 KB Output is correct
42 Correct 177 ms 12392 KB Output is correct
43 Correct 170 ms 12336 KB Output is correct
44 Correct 1 ms 384 KB Output is correct
45 Correct 1 ms 256 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 1 ms 384 KB Output is correct
49 Correct 1 ms 384 KB Output is correct
50 Correct 1 ms 256 KB Output is correct
51 Correct 1 ms 384 KB Output is correct
52 Correct 1 ms 256 KB Output is correct
53 Correct 0 ms 256 KB Output is correct
54 Correct 1 ms 256 KB Output is correct
55 Correct 1 ms 384 KB Output is correct
56 Correct 1 ms 256 KB Output is correct
57 Correct 1 ms 256 KB Output is correct
58 Correct 0 ms 384 KB Output is correct
59 Correct 0 ms 384 KB Output is correct
60 Correct 1 ms 256 KB Output is correct
61 Correct 1 ms 384 KB Output is correct
62 Correct 1 ms 256 KB Output is correct
63 Correct 1 ms 384 KB Output is correct
64 Execution timed out 2045 ms 12392 KB Time limit exceeded
65 Halted 0 ms 0 KB -