oj.uz

Submission #598190

# Submission time Handle Problem Language Result Execution time Memory
598190 2022-07-17T19:05:25 Z yanndev Ancient Books (IOI17_books) C++17
0 / 100
 2000 ms 340 KB 
#include <bits/stdc++.h>
#define ll long long
using namespace std;

ll minimum_walk(vector<int> p, int s) {
    ll ans = 1e9;
    int n = (int)p.size();
    vector<vector<int>> cycles {};
    vector<bool> vis (n, false);
    int last = 0;
    for (int i = 0; i < n; i++) {
        if (vis[i])
            continue;
        
        //ans += abs(i - last);
        int pos = i;
        last = i;
        cycles.push_back({});
        while (!vis[pos]) {
            vis[pos] = true;
            cycles.back().push_back(pos);
            //ans += abs(p[pos] - pos);
            pos = p[pos];
        }
    }

    //ans += last;
	vector<int> perm {};
	for (int i = 0; i < (int)cycles.size(); i++)
		perm.push_back(i);
	do {
		ll sub = 0;
		int lst = 0;
		for (int i = 0; i < (int)cycles.size(); i++) {
			for (auto& x: cycles[i]) {
				sub += abs(x - lst);
				lst = x;
			}
		}
		sub += lst;
		ans = min(ans, sub);
	} while (next_permutation(perm.begin(), perm.end()));
    return ans;
}

Compilation message

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:10:9: warning: variable 'last' set but not used [-Wunused-but-set-variable]
   10 |     int last = 0;
      |         ^~~~

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Incorrect 0 ms 212 KB 3rd lines differ - on the 1st token, expected: '4', found: '8'
6 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Incorrect 0 ms 212 KB 3rd lines differ - on the 1st token, expected: '4', found: '8'
6 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Incorrect 0 ms 212 KB 3rd lines differ - on the 1st token, expected: '4', found: '8'
6 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2090 ms 340 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Incorrect 0 ms 212 KB 3rd lines differ - on the 1st token, expected: '4', found: '8'
6 Halted 0 ms 0 KB -