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Submission #292796

# Submission time Handle Problem Language Result Execution time Memory
292796 2020-09-07T13:32:48 Z Saboon Ancient Books (IOI17_books) C++17
50 / 100
 327 ms 69608 KB 
#include "books.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int maxn = 1e6 + 10;

bool visited[maxn];
int c[maxn];
vector<pair<int,int>> g[maxn];
ll dp[maxn];

long long MST(int src){
    ll ret = 0;
    memset(dp, 63, sizeof dp);
    dp[src] = 0;
    set<pair<ll,int>> S;
    S.insert({dp[src],src});
    while (!S.empty()){
        int v = (*S.begin()).second;
        S.erase(S.begin());
        ret += dp[v];
        for (auto [u,w] : g[v]){
            if (dp[u] > w){
                S.erase({dp[u],u});
                dp[u] = w;
                S.insert({dp[u],u});
            }
        }
    }
    return 2LL*ret;
}

long long minimum_walk(vector<int> p, int s){
	int n = p.size();
	set<int> S;
	ll answer = 0;
    for (int i = 0; i < n; i++)
        answer += abs(p[i]-i);
	int tmp = 0, Max, Min, last;
	Max = s, last = s+1;
    for (int i = s; i < n; i++){
        if (!visited[i] and p[i] != i){
            int x = i;
            c[i] = i+1;
            if (i != s){
                g[last].push_back({c[i],max(0,i-Max)});
                g[c[i]].push_back({last,0});
            }
            while (!visited[x]){
                visited[x] = 1;
                c[x] = c[i];
                if (x > Max){
                    Max = x;
                    last = c[x];
                }
                x = p[x];
            }
        }
    }
    Min = s, last = s+1;
    memset(visited, 0, sizeof visited);
	for (int i = s; i >= 0; i--){
        if (!visited[i] and p[i] != i){
            int x = i;
            if (c[i] == 0)
                c[i] = i+1;
            if (i != s){
                g[last].push_back({c[i],max(0,Min-i)});
                g[c[i]].push_back({last,0});
            }
            while (!visited[x]){
                visited[x] = 1;
                c[x] = c[i];
                if (Min > x){
                    Min = x;
                    last = c[x];
                }
                x = p[x];
            }
        }
	}
	answer += MST(s+1);
	return answer;
}

Compilation message

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:37:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   37 |     for (int i = 0; i < n; i++)
      |     ^~~
books.cpp:39:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   39 |  int tmp = 0, Max, Min, last;
      |  ^~~
books.cpp:39:6: warning: unused variable 'tmp' [-Wunused-variable]
   39 |  int tmp = 0, Max, Min, last;
      |      ^~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 32640 KB Output is correct
2 Correct 21 ms 32640 KB Output is correct
3 Correct 22 ms 32640 KB Output is correct
4 Correct 27 ms 32640 KB Output is correct
5 Correct 22 ms 32768 KB Output is correct
6 Correct 21 ms 32632 KB Output is correct
7 Correct 23 ms 32632 KB Output is correct
8 Correct 22 ms 32640 KB Output is correct
9 Correct 22 ms 32640 KB Output is correct
10 Correct 21 ms 32640 KB Output is correct
11 Correct 23 ms 32640 KB Output is correct
12 Correct 22 ms 32768 KB Output is correct
13 Correct 22 ms 32640 KB Output is correct
14 Correct 22 ms 32768 KB Output is correct
15 Correct 23 ms 32640 KB Output is correct
16 Correct 22 ms 32640 KB Output is correct
17 Correct 22 ms 32640 KB Output is correct
18 Correct 24 ms 32640 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 32640 KB Output is correct
2 Correct 21 ms 32640 KB Output is correct
3 Correct 22 ms 32640 KB Output is correct
4 Correct 27 ms 32640 KB Output is correct
5 Correct 22 ms 32768 KB Output is correct
6 Correct 21 ms 32632 KB Output is correct
7 Correct 23 ms 32632 KB Output is correct
8 Correct 22 ms 32640 KB Output is correct
9 Correct 22 ms 32640 KB Output is correct
10 Correct 21 ms 32640 KB Output is correct
11 Correct 23 ms 32640 KB Output is correct
12 Correct 22 ms 32768 KB Output is correct
13 Correct 22 ms 32640 KB Output is correct
14 Correct 22 ms 32768 KB Output is correct
15 Correct 23 ms 32640 KB Output is correct
16 Correct 22 ms 32640 KB Output is correct
17 Correct 22 ms 32640 KB Output is correct
18 Correct 24 ms 32640 KB Output is correct
19 Correct 22 ms 32640 KB Output is correct
20 Correct 22 ms 32640 KB Output is correct
21 Correct 22 ms 32640 KB Output is correct
22 Correct 25 ms 32640 KB Output is correct
23 Correct 22 ms 32640 KB Output is correct
24 Correct 22 ms 32640 KB Output is correct
25 Correct 22 ms 32640 KB Output is correct
26 Correct 22 ms 32640 KB Output is correct
27 Correct 24 ms 32640 KB Output is correct
28 Correct 22 ms 32640 KB Output is correct
29 Correct 22 ms 32640 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 32640 KB Output is correct
2 Correct 21 ms 32640 KB Output is correct
3 Correct 22 ms 32640 KB Output is correct
4 Correct 27 ms 32640 KB Output is correct
5 Correct 22 ms 32768 KB Output is correct
6 Correct 21 ms 32632 KB Output is correct
7 Correct 23 ms 32632 KB Output is correct
8 Correct 22 ms 32640 KB Output is correct
9 Correct 22 ms 32640 KB Output is correct
10 Correct 21 ms 32640 KB Output is correct
11 Correct 23 ms 32640 KB Output is correct
12 Correct 22 ms 32768 KB Output is correct
13 Correct 22 ms 32640 KB Output is correct
14 Correct 22 ms 32768 KB Output is correct
15 Correct 23 ms 32640 KB Output is correct
16 Correct 22 ms 32640 KB Output is correct
17 Correct 22 ms 32640 KB Output is correct
18 Correct 24 ms 32640 KB Output is correct
19 Correct 22 ms 32640 KB Output is correct
20 Correct 22 ms 32640 KB Output is correct
21 Correct 22 ms 32640 KB Output is correct
22 Correct 25 ms 32640 KB Output is correct
23 Correct 22 ms 32640 KB Output is correct
24 Correct 22 ms 32640 KB Output is correct
25 Correct 22 ms 32640 KB Output is correct
26 Correct 22 ms 32640 KB Output is correct
27 Correct 24 ms 32640 KB Output is correct
28 Correct 22 ms 32640 KB Output is correct
29 Correct 22 ms 32640 KB Output is correct
30 Correct 327 ms 44296 KB Output is correct
31 Correct 316 ms 44408 KB Output is correct
32 Correct 164 ms 40440 KB Output is correct
33 Correct 218 ms 50440 KB Output is correct
34 Correct 220 ms 50444 KB Output is correct
35 Correct 223 ms 51320 KB Output is correct
36 Correct 216 ms 49808 KB Output is correct
37 Correct 185 ms 45332 KB Output is correct
38 Correct 181 ms 44536 KB Output is correct
39 Correct 181 ms 44536 KB Output is correct
40 Correct 185 ms 44408 KB Output is correct
41 Correct 223 ms 44296 KB Output is correct
42 Correct 200 ms 44408 KB Output is correct
43 Correct 312 ms 69608 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 23 ms 32640 KB 3rd lines differ - on the 1st token, expected: '3304', found: '3324'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 32640 KB Output is correct
2 Correct 21 ms 32640 KB Output is correct
3 Correct 22 ms 32640 KB Output is correct
4 Correct 27 ms 32640 KB Output is correct
5 Correct 22 ms 32768 KB Output is correct
6 Correct 21 ms 32632 KB Output is correct
7 Correct 23 ms 32632 KB Output is correct
8 Correct 22 ms 32640 KB Output is correct
9 Correct 22 ms 32640 KB Output is correct
10 Correct 21 ms 32640 KB Output is correct
11 Correct 23 ms 32640 KB Output is correct
12 Correct 22 ms 32768 KB Output is correct
13 Correct 22 ms 32640 KB Output is correct
14 Correct 22 ms 32768 KB Output is correct
15 Correct 23 ms 32640 KB Output is correct
16 Correct 22 ms 32640 KB Output is correct
17 Correct 22 ms 32640 KB Output is correct
18 Correct 24 ms 32640 KB Output is correct
19 Correct 22 ms 32640 KB Output is correct
20 Correct 22 ms 32640 KB Output is correct
21 Correct 22 ms 32640 KB Output is correct
22 Correct 25 ms 32640 KB Output is correct
23 Correct 22 ms 32640 KB Output is correct
24 Correct 22 ms 32640 KB Output is correct
25 Correct 22 ms 32640 KB Output is correct
26 Correct 22 ms 32640 KB Output is correct
27 Correct 24 ms 32640 KB Output is correct
28 Correct 22 ms 32640 KB Output is correct
29 Correct 22 ms 32640 KB Output is correct
30 Correct 327 ms 44296 KB Output is correct
31 Correct 316 ms 44408 KB Output is correct
32 Correct 164 ms 40440 KB Output is correct
33 Correct 218 ms 50440 KB Output is correct
34 Correct 220 ms 50444 KB Output is correct
35 Correct 223 ms 51320 KB Output is correct
36 Correct 216 ms 49808 KB Output is correct
37 Correct 185 ms 45332 KB Output is correct
38 Correct 181 ms 44536 KB Output is correct
39 Correct 181 ms 44536 KB Output is correct
40 Correct 185 ms 44408 KB Output is correct
41 Correct 223 ms 44296 KB Output is correct
42 Correct 200 ms 44408 KB Output is correct
43 Correct 312 ms 69608 KB Output is correct
44 Incorrect 23 ms 32640 KB 3rd lines differ - on the 1st token, expected: '3304', found: '3324'
45 Halted 0 ms 0 KB -