#include "books.h"
#include "bits/stdc++.h"
using namespace std;
using ll = long long;
ll solve(vector<int> p, int force) {
int n = p.size(), s = 0, t = n-1;
while(s+1<=force && p[s]==s) s++;
while(t-1>=force && p[t]==t) t--;
ll ans = 0;
vector<int> cnt(n), L(n), R(n);
for(int i=s; i<=t; ++i) {
if(p[i] > i) cnt[i]++, cnt[p[i]]--;
}
int delta = 0;
for(int i=s; i<=t; ++i) {
delta += cnt[i];
L[i] = delta;
}
cnt = vector<int>(n, 0);
for(int i=s; i<=t; ++i) {
if(p[i] < i) {
cnt[i-1]++;
if(p[i]-1>=0) cnt[p[i]-1]--;
}
}
delta = 0;
for(int i=t; i>=s; --i) {
delta += cnt[i];
R[i] = delta;
}
for(int i=s; i<t; ++i) {
ans += max(2, max(L[i], R[i])*2);
}
return ans;
}
ll minimum_walk(vector<int> p, int s) {
int n = p.size();
vector<int> pref(n), suf(n);
pref[0] = p[0], suf[n-1] = p[n-1];
for(int i=1; i<n; ++i) {
pref[i] = max(pref[i-1], p[i]);
}
for(int i=n-2; i>=0; --i) {
suf[i] = min(suf[i+1], p[i]);
}
if(s==0 || p[s]!=s || (pref[s-1]<s && suf[s-1]>s)) {
return solve(p, s);
}
ll ans = 1e18+1;
vector<int> q = p;
for(int i=0; i<n; ++i) {
if(i==s) continue;
q[i] = s;
q[s] = p[i];
ans = min(ans, solve(q, s));
q[i] = p[i];
q[s] = p[s];
}
return ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
364 KB |
Output is correct |
| 22 |
Correct |
1 ms |
364 KB |
Output is correct |
| 23 |
Correct |
1 ms |
364 KB |
Output is correct |
| 24 |
Correct |
1 ms |
364 KB |
Output is correct |
| 25 |
Correct |
1 ms |
364 KB |
Output is correct |
| 26 |
Correct |
1 ms |
364 KB |
Output is correct |
| 27 |
Correct |
1 ms |
364 KB |
Output is correct |
| 28 |
Correct |
1 ms |
364 KB |
Output is correct |
| 29 |
Correct |
1 ms |
364 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
364 KB |
Output is correct |
| 22 |
Correct |
1 ms |
364 KB |
Output is correct |
| 23 |
Correct |
1 ms |
364 KB |
Output is correct |
| 24 |
Correct |
1 ms |
364 KB |
Output is correct |
| 25 |
Correct |
1 ms |
364 KB |
Output is correct |
| 26 |
Correct |
1 ms |
364 KB |
Output is correct |
| 27 |
Correct |
1 ms |
364 KB |
Output is correct |
| 28 |
Correct |
1 ms |
364 KB |
Output is correct |
| 29 |
Correct |
1 ms |
364 KB |
Output is correct |
| 30 |
Correct |
166 ms |
35820 KB |
Output is correct |
| 31 |
Correct |
183 ms |
35820 KB |
Output is correct |
| 32 |
Correct |
169 ms |
35820 KB |
Output is correct |
| 33 |
Correct |
166 ms |
35820 KB |
Output is correct |
| 34 |
Correct |
160 ms |
35820 KB |
Output is correct |
| 35 |
Correct |
163 ms |
35820 KB |
Output is correct |
| 36 |
Correct |
167 ms |
35820 KB |
Output is correct |
| 37 |
Correct |
164 ms |
35820 KB |
Output is correct |
| 38 |
Correct |
172 ms |
35820 KB |
Output is correct |
| 39 |
Correct |
168 ms |
35948 KB |
Output is correct |
| 40 |
Correct |
165 ms |
35820 KB |
Output is correct |
| 41 |
Correct |
164 ms |
35820 KB |
Output is correct |
| 42 |
Correct |
166 ms |
35820 KB |
Output is correct |
| 43 |
Correct |
162 ms |
35744 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
364 KB |
3rd lines differ - on the 1st token, expected: '3304', found: '2744' |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
364 KB |
Output is correct |
| 22 |
Correct |
1 ms |
364 KB |
Output is correct |
| 23 |
Correct |
1 ms |
364 KB |
Output is correct |
| 24 |
Correct |
1 ms |
364 KB |
Output is correct |
| 25 |
Correct |
1 ms |
364 KB |
Output is correct |
| 26 |
Correct |
1 ms |
364 KB |
Output is correct |
| 27 |
Correct |
1 ms |
364 KB |
Output is correct |
| 28 |
Correct |
1 ms |
364 KB |
Output is correct |
| 29 |
Correct |
1 ms |
364 KB |
Output is correct |
| 30 |
Correct |
166 ms |
35820 KB |
Output is correct |
| 31 |
Correct |
183 ms |
35820 KB |
Output is correct |
| 32 |
Correct |
169 ms |
35820 KB |
Output is correct |
| 33 |
Correct |
166 ms |
35820 KB |
Output is correct |
| 34 |
Correct |
160 ms |
35820 KB |
Output is correct |
| 35 |
Correct |
163 ms |
35820 KB |
Output is correct |
| 36 |
Correct |
167 ms |
35820 KB |
Output is correct |
| 37 |
Correct |
164 ms |
35820 KB |
Output is correct |
| 38 |
Correct |
172 ms |
35820 KB |
Output is correct |
| 39 |
Correct |
168 ms |
35948 KB |
Output is correct |
| 40 |
Correct |
165 ms |
35820 KB |
Output is correct |
| 41 |
Correct |
164 ms |
35820 KB |
Output is correct |
| 42 |
Correct |
166 ms |
35820 KB |
Output is correct |
| 43 |
Correct |
162 ms |
35744 KB |
Output is correct |
| 44 |
Incorrect |
1 ms |
364 KB |
3rd lines differ - on the 1st token, expected: '3304', found: '2744' |
| 45 |
Halted |
0 ms |
0 KB |
- |
