#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll INF = 1e9;
ll MOD = 998244353;
typedef pair<ll,ll> ii;
#define iii pair<int,int>
#define f(i,a,b) for(ll i = a;i < b;i++)
#define pb push_back
#define vll vector<ll>
#define F first
#define S second
#define all(x) (x).begin(), (x).end()
///I hope I will get uprating and don't make mistakes
///I will never stop programming
///sqrt(-1) Love C++
///Please don't hack me
///@TheofanisOrfanou Theo830
///Think different approaches (bs,dp,greedy,graphs,shortest paths,mst)
///Stay Calm
///Look for special cases
///Beware of overflow and array bounds
///Think the problem backwards
///Training
#include "books.h"
long long minimum_walk(std::vector<int> p, int s) {
ll ans = 0;
ll n = p.size();
assert(s == 0 && n <= 1000);
bool v[n] = {0};
ll dist = 0;
ll l[n],r[n];
f(i,0,n){
l[i] = -1;
}
vector<ii>rang;
f(i,0,n){
if(p[i] != i && !v[i]){
ll last = i;
ll st = i;
ll pos = p[i];
v[i] = 1;
l[st] = i,r[st] = pos;
while(pos != st){
l[st] = min(l[st],pos);
r[st] = max(r[st],pos);
v[pos] = 1;
ans += abs(pos - last);
last = pos;
pos = p[pos];
}
ans += abs(pos - last);
l[st] = min(l[st],pos);
r[st] = max(r[st],pos);
rang.pb(ii(l[st],r[st]));
}
else{
v[i] = 1;
}
if(p[i] == i){
rang.pb(ii(i,i));
}
}
sort(all(rang));
f(i,0,rang.size()-1){
if(rang[i].S < rang[i+1].F){
dist = rang[i+1].F;
}
}
ans += 2 * dist;
return ans;
}
/*
using namespace std;
int main() {
int n, s;
assert(2 == scanf("%d %d", &n, &s));
vector<int> p((unsigned) n);
for(int i = 0; i < n; i++)
assert(1 == scanf("%d", &p[(unsigned) i]));
long long res = minimum_walk(p, s);
printf("%lld\n", res);
return 0;
}
*/
/*
4 0
0 2 3 1
*/
Compilation message
books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:8:33: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
8 | #define f(i,a,b) for(ll i = a;i < b;i++)
......
65 | f(i,0,rang.size()-1){
| ~~~~~~~~~~~~~~~~~
books.cpp:65:5: note: in expansion of macro 'f'
65 | f(i,0,rang.size()-1){
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
204 KB |
Output is correct |
| 2 |
Correct |
0 ms |
204 KB |
Output is correct |
| 3 |
Correct |
0 ms |
204 KB |
Output is correct |
| 4 |
Correct |
0 ms |
204 KB |
Output is correct |
| 5 |
Incorrect |
1 ms |
204 KB |
3rd lines differ - on the 1st token, expected: '4', found: '10' |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
204 KB |
Output is correct |
| 2 |
Correct |
0 ms |
204 KB |
Output is correct |
| 3 |
Correct |
0 ms |
204 KB |
Output is correct |
| 4 |
Correct |
0 ms |
204 KB |
Output is correct |
| 5 |
Incorrect |
1 ms |
204 KB |
3rd lines differ - on the 1st token, expected: '4', found: '10' |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
204 KB |
Output is correct |
| 2 |
Correct |
0 ms |
204 KB |
Output is correct |
| 3 |
Correct |
0 ms |
204 KB |
Output is correct |
| 4 |
Correct |
0 ms |
204 KB |
Output is correct |
| 5 |
Incorrect |
1 ms |
204 KB |
3rd lines differ - on the 1st token, expected: '4', found: '10' |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
460 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
204 KB |
Output is correct |
| 2 |
Correct |
0 ms |
204 KB |
Output is correct |
| 3 |
Correct |
0 ms |
204 KB |
Output is correct |
| 4 |
Correct |
0 ms |
204 KB |
Output is correct |
| 5 |
Incorrect |
1 ms |
204 KB |
3rd lines differ - on the 1st token, expected: '4', found: '10' |
| 6 |
Halted |
0 ms |
0 KB |
- |
