#include "books.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 1e6 + 12;
int n;
long long minimum_walk(vector<int> p, int s) {
n = (int)p.size();
int it = 0;
ll res = 0;
for(int i = 0;i < n;i++) {
res += abs(i - p[i]);
}
if(s == 0) {
int nn = -1;
for(int i = n - 1;i >= 0;i--) {
if(p[i] != i) {
nn = i;
break;
}
}
int mx = -1;
for(int i = 0;i < nn;i++) {
mx = max(mx,p[i]);
if(mx == i) {
res += 2;
}
}
return res;
}
int l = s,r = s,R = s,L = s;
int tl,tr;
for(int i = 0;i < n;i++) {
if(p[i] != i) {
tl = i;
break;
}
}
for(int i = n - 1;i >= 0;i--) {
if(i != p[i]) {
tr = i;
break;
}
}
if(!res) {
return res;
}
while(true) {
R = max({R,p[r],p[l]});
L = min({L,p[l],p[r]});
if(l <= tl && r >= tr) {
break;
}
if(r < R) {
assert(R <= tr);
r++;
} else if(L < l) {
assert(L >= tl);
l--;
} else {
int l_ = -1e9,r_ = (int)1e9;
for(int i = l - 1;i >= tl;i--) {
if(p[i] > r) {
l_ = i;
break;
}
}
for(int i = r + 1;i <= tr;i++) {
if(p[i] < l) {
r_ = i;
break;
}
}
if(l_ == (int)-1e9) {
assert(r_ == (int)1e9);
if(l > tl) {
res += 2;
l--;
int mn = (int)1e9;
for(int j = l;j > tl;--j) {
assert(p[j] <= l && p[j] >= tl);
mn = min(mn,p[j]);
if(j == mn) {
res += 2;
}
}
}
if(r < tr) {
res += 2;
r++;
int mx = -1;
for(int j = r;j < tr;j++) {
assert(p[j] >= r && p[j] <= tr);
mx = max(mx,p[j]);
if(mx == j) {
res += 2;
}
}
}
return res;
} else {
ll a = 0,b = 0;
int mn = (int)1e9;
for(int j = l - 1;j > l_;j--) {
mn = min(mn,p[j]);
if(mn == j) {
a += 2;
}
}
int mx= -1;
for(int j = r + 1;j < r_;j++) {
mx = max(mx,p[j]);
if(mx == j) b += 2;
}
if(a < b) {
res += a;
for(int j = l - 1;j > l_;j--) {
L = min(L,p[j]);
R = max(R,p[j]);
}
l = l_;
} else {
res += b;
for(int j = r + 1;j < r_;j++) {
L = min(L,p[j]);
R = max(R,p[j]);
}
r = r_;
}
}
}
}
return res;
}
Compilation message
books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:11:13: warning: unused variable 'it' [-Wunused-variable]
11 | int it = 0;
| ^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
352 KB |
Output is correct |
| 2 |
Correct |
0 ms |
428 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
352 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
352 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
344 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
352 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
0 ms |
352 KB |
Output is correct |
| 18 |
Correct |
0 ms |
436 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
352 KB |
Output is correct |
| 2 |
Correct |
0 ms |
428 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
352 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
352 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
344 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
352 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
0 ms |
352 KB |
Output is correct |
| 18 |
Correct |
0 ms |
436 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
0 ms |
352 KB |
Output is correct |
| 21 |
Correct |
1 ms |
348 KB |
Output is correct |
| 22 |
Correct |
1 ms |
344 KB |
Output is correct |
| 23 |
Correct |
0 ms |
348 KB |
Output is correct |
| 24 |
Correct |
0 ms |
344 KB |
Output is correct |
| 25 |
Correct |
0 ms |
348 KB |
Output is correct |
| 26 |
Correct |
1 ms |
348 KB |
Output is correct |
| 27 |
Correct |
0 ms |
348 KB |
Output is correct |
| 28 |
Correct |
1 ms |
356 KB |
Output is correct |
| 29 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
352 KB |
Output is correct |
| 2 |
Correct |
0 ms |
428 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
352 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
352 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
344 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
352 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
0 ms |
352 KB |
Output is correct |
| 18 |
Correct |
0 ms |
436 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
0 ms |
352 KB |
Output is correct |
| 21 |
Correct |
1 ms |
348 KB |
Output is correct |
| 22 |
Correct |
1 ms |
344 KB |
Output is correct |
| 23 |
Correct |
0 ms |
348 KB |
Output is correct |
| 24 |
Correct |
0 ms |
344 KB |
Output is correct |
| 25 |
Correct |
0 ms |
348 KB |
Output is correct |
| 26 |
Correct |
1 ms |
348 KB |
Output is correct |
| 27 |
Correct |
0 ms |
348 KB |
Output is correct |
| 28 |
Correct |
1 ms |
356 KB |
Output is correct |
| 29 |
Correct |
0 ms |
348 KB |
Output is correct |
| 30 |
Correct |
119 ms |
12960 KB |
Output is correct |
| 31 |
Correct |
74 ms |
12624 KB |
Output is correct |
| 32 |
Correct |
77 ms |
12636 KB |
Output is correct |
| 33 |
Correct |
76 ms |
12628 KB |
Output is correct |
| 34 |
Correct |
82 ms |
12968 KB |
Output is correct |
| 35 |
Correct |
71 ms |
12880 KB |
Output is correct |
| 36 |
Correct |
77 ms |
12940 KB |
Output is correct |
| 37 |
Correct |
75 ms |
12884 KB |
Output is correct |
| 38 |
Correct |
65 ms |
12884 KB |
Output is correct |
| 39 |
Correct |
95 ms |
13056 KB |
Output is correct |
| 40 |
Correct |
86 ms |
12868 KB |
Output is correct |
| 41 |
Correct |
74 ms |
12880 KB |
Output is correct |
| 42 |
Correct |
73 ms |
12932 KB |
Output is correct |
| 43 |
Correct |
66 ms |
13088 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
344 KB |
3rd lines differ - on the 1st token, expected: '3304', found: '3302' |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
352 KB |
Output is correct |
| 2 |
Correct |
0 ms |
428 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
352 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
352 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
344 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
352 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
0 ms |
352 KB |
Output is correct |
| 18 |
Correct |
0 ms |
436 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
0 ms |
352 KB |
Output is correct |
| 21 |
Correct |
1 ms |
348 KB |
Output is correct |
| 22 |
Correct |
1 ms |
344 KB |
Output is correct |
| 23 |
Correct |
0 ms |
348 KB |
Output is correct |
| 24 |
Correct |
0 ms |
344 KB |
Output is correct |
| 25 |
Correct |
0 ms |
348 KB |
Output is correct |
| 26 |
Correct |
1 ms |
348 KB |
Output is correct |
| 27 |
Correct |
0 ms |
348 KB |
Output is correct |
| 28 |
Correct |
1 ms |
356 KB |
Output is correct |
| 29 |
Correct |
0 ms |
348 KB |
Output is correct |
| 30 |
Correct |
119 ms |
12960 KB |
Output is correct |
| 31 |
Correct |
74 ms |
12624 KB |
Output is correct |
| 32 |
Correct |
77 ms |
12636 KB |
Output is correct |
| 33 |
Correct |
76 ms |
12628 KB |
Output is correct |
| 34 |
Correct |
82 ms |
12968 KB |
Output is correct |
| 35 |
Correct |
71 ms |
12880 KB |
Output is correct |
| 36 |
Correct |
77 ms |
12940 KB |
Output is correct |
| 37 |
Correct |
75 ms |
12884 KB |
Output is correct |
| 38 |
Correct |
65 ms |
12884 KB |
Output is correct |
| 39 |
Correct |
95 ms |
13056 KB |
Output is correct |
| 40 |
Correct |
86 ms |
12868 KB |
Output is correct |
| 41 |
Correct |
74 ms |
12880 KB |
Output is correct |
| 42 |
Correct |
73 ms |
12932 KB |
Output is correct |
| 43 |
Correct |
66 ms |
13088 KB |
Output is correct |
| 44 |
Incorrect |
0 ms |
344 KB |
3rd lines differ - on the 1st token, expected: '3304', found: '3302' |
| 45 |
Halted |
0 ms |
0 KB |
- |
