oj.uz

Submission #292728

# Submission time Handle Problem Language Result Execution time Memory
292728 2020-09-07T12:31:33 Z Saboon Ancient Books (IOI17_books) C++17
0 / 100
 1 ms 384 KB 
//#include "books.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int maxn = 1e6 + 10;

bool pre[maxn], suf[maxn];

long long minimum_walk(vector<int> p, int s){
	int n = p.size();
	for (int i = 0; i < n; i++){
        if (p[i] != i)
            break;
        pre[i] = 1;
	}
	for (int i = n-1; i >= 0; i--){
        if (p[i] != i)
            break;
        suf[i] = 1;
	}
	set<int> S;
	ll answer = 0;
	for (int i = 0; i < n-1; i++){
        S.insert(p[i]);
        if (!S.empty() and *S.begin() == i)
            S.erase(S.begin());
        int cnt = 0, q = S.size();
        if (i < s)
            cnt = max(cnt, 1-pre[i]);
        else
            cnt = max(cnt, 1-suf[i+1]);
        answer += 2*cnt;
	}
	return answer;
}

Compilation message

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:27:22: warning: unused variable 'q' [-Wunused-variable]
   27 |         int cnt = 0, q = S.size();
      |                      ^

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Incorrect 0 ms 256 KB 3rd lines differ - on the 1st token, expected: '8', found: '6'
4 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Incorrect 0 ms 256 KB 3rd lines differ - on the 1st token, expected: '8', found: '6'
4 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Incorrect 0 ms 256 KB 3rd lines differ - on the 1st token, expected: '8', found: '6'
4 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 384 KB 3rd lines differ - on the 1st token, expected: '3304', found: '1998'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Incorrect 0 ms 256 KB 3rd lines differ - on the 1st token, expected: '8', found: '6'
4 Halted 0 ms 0 KB -