| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 364741 |
2021-02-09T21:00:44 Z |
rqi |
Ancient Books (IOI17_books) |
C++14 |
|
276 ms |
26908 KB |
#include "books.h"
#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
typedef long long ll;
#define sz(x) (int)(x).size()
#define pb push_back
#define bk back()
const int MOD = 1e9+7;
const int mx = 1000005;
vi p;
int s;
int cycL[mx]; //leftmost of a cycle
int cycR[mx]; //rightmost of a cycle
void popLRSingles(){
int L = 0;
for(int i = 0; i < s; i++){
if(p[i] == i){
L = i+1;
}
else{
break;
}
}
vi newp;
for(int i = L; i < sz(p); i++){
newp.pb(p[i]-L);
}
p = newp;
s = s-L;
// for(int i = 0; i < sz(p); i++){
// cout << i << " " << p[i] << "\n";
// }
while(true){
if(sz(p)-1 == s) break;
if(p[sz(p)-1] == sz(p)-1){
//cout << sz(p)-1 << "\n";
p.pop_back();
}
else{
break;
}
}
}
int curL, curR;
int Lfrees, Rfrees;
void getFrees(){
while(true){
bool updated = false;
while(Lfrees >= 0){
cout.flush();
int node = Lfrees;
if(node < curL) break;
updated = true;
Lfrees--;
curL = min(curL, cycL[node]);
curR = max(curR, cycR[node]);
}
while(Rfrees < sz(p)){
int node = Rfrees;
if(node > curR) break;
updated = true;
Rfrees++;
curL = min(curL, cycL[node]);
curR = max(curR, cycR[node]);
}
if(!updated) break;
}
}
long long minimum_walk(vi _p, int _s) {
p = _p;
s = _s;
popLRSingles();
int n = sz(p);
for(int i = 0; i < n; i++){
cycL[i] = MOD;
cycR[i] = -1;
}
for(int i = 0; i < n; i++){
if(cycR[i] == -1){
int curnode = i;
while(true){
cycL[i] = min(cycL[i], curnode);
cycR[i] = max(cycR[i], curnode);
curnode = p[curnode];
if(curnode == i) break;
}
while(true){
cycL[curnode] = cycL[i];
cycR[curnode] = cycR[i];
curnode = p[curnode];
if(curnode == i) break;
}
}
}
ll ans = 0;
for(int i = 0; i < n; i++){
ans+=abs(p[i]-i);
}
curL = s;
curR = s;
Lfrees = s;
Rfrees = s;
getFrees();
while(curL > 0 || curR < n-1){
int prev_curL = curL;
int prev_curR = curR;
ll L_cost = 0;
ll R_cost = 0;
bool non_boost = false;
for(int i = curL-1; i >= 0; i--){
if(i+1 == curL){
L_cost+=2;
curL--;
}
curL = min(curL, cycL[i]);
if(cycR[i] > prev_curR){
//found non boost
non_boost = true;
break;
}
}
for(int i = curR+1; i < n; i++){
if(i-1 == curR){
R_cost+=2;
curR++;
}
curR = max(curR, cycR[i]);
if(cycL[i] < prev_curL){
non_boost = true;
break;
}
}
if(!non_boost){
ans+=L_cost+R_cost;
}
else{
ans+=min(L_cost, R_cost);
}
getFrees();
}
return ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
492 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
0 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 |
0 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 |
492 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
0 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 |
0 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 |
384 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 |
492 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 |
492 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
0 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 |
0 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 |
384 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 |
492 KB |
Output is correct |
| 28 |
Correct |
1 ms |
364 KB |
Output is correct |
| 29 |
Correct |
1 ms |
364 KB |
Output is correct |
| 30 |
Correct |
242 ms |
20372 KB |
Output is correct |
| 31 |
Correct |
276 ms |
20372 KB |
Output is correct |
| 32 |
Correct |
128 ms |
16752 KB |
Output is correct |
| 33 |
Correct |
147 ms |
20372 KB |
Output is correct |
| 34 |
Correct |
146 ms |
20500 KB |
Output is correct |
| 35 |
Correct |
149 ms |
20372 KB |
Output is correct |
| 36 |
Correct |
153 ms |
20372 KB |
Output is correct |
| 37 |
Correct |
156 ms |
20372 KB |
Output is correct |
| 38 |
Correct |
143 ms |
20500 KB |
Output is correct |
| 39 |
Correct |
143 ms |
20500 KB |
Output is correct |
| 40 |
Correct |
154 ms |
20460 KB |
Output is correct |
| 41 |
Correct |
175 ms |
20484 KB |
Output is correct |
| 42 |
Correct |
169 ms |
20460 KB |
Output is correct |
| 43 |
Correct |
142 ms |
20472 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 |
364 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 |
388 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 |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
492 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
0 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 |
0 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 |
384 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 |
492 KB |
Output is correct |
| 28 |
Correct |
1 ms |
364 KB |
Output is correct |
| 29 |
Correct |
1 ms |
364 KB |
Output is correct |
| 30 |
Correct |
242 ms |
20372 KB |
Output is correct |
| 31 |
Correct |
276 ms |
20372 KB |
Output is correct |
| 32 |
Correct |
128 ms |
16752 KB |
Output is correct |
| 33 |
Correct |
147 ms |
20372 KB |
Output is correct |
| 34 |
Correct |
146 ms |
20500 KB |
Output is correct |
| 35 |
Correct |
149 ms |
20372 KB |
Output is correct |
| 36 |
Correct |
153 ms |
20372 KB |
Output is correct |
| 37 |
Correct |
156 ms |
20372 KB |
Output is correct |
| 38 |
Correct |
143 ms |
20500 KB |
Output is correct |
| 39 |
Correct |
143 ms |
20500 KB |
Output is correct |
| 40 |
Correct |
154 ms |
20460 KB |
Output is correct |
| 41 |
Correct |
175 ms |
20484 KB |
Output is correct |
| 42 |
Correct |
169 ms |
20460 KB |
Output is correct |
| 43 |
Correct |
142 ms |
20472 KB |
Output is correct |
| 44 |
Correct |
1 ms |
364 KB |
Output is correct |
| 45 |
Correct |
1 ms |
364 KB |
Output is correct |
| 46 |
Correct |
1 ms |
364 KB |
Output is correct |
| 47 |
Correct |
1 ms |
364 KB |
Output is correct |
| 48 |
Correct |
1 ms |
364 KB |
Output is correct |
| 49 |
Correct |
1 ms |
364 KB |
Output is correct |
| 50 |
Correct |
1 ms |
364 KB |
Output is correct |
| 51 |
Correct |
1 ms |
364 KB |
Output is correct |
| 52 |
Correct |
1 ms |
364 KB |
Output is correct |
| 53 |
Correct |
1 ms |
364 KB |
Output is correct |
| 54 |
Correct |
1 ms |
364 KB |
Output is correct |
| 55 |
Correct |
1 ms |
364 KB |
Output is correct |
| 56 |
Correct |
1 ms |
364 KB |
Output is correct |
| 57 |
Correct |
1 ms |
388 KB |
Output is correct |
| 58 |
Correct |
1 ms |
364 KB |
Output is correct |
| 59 |
Correct |
1 ms |
364 KB |
Output is correct |
| 60 |
Correct |
1 ms |
364 KB |
Output is correct |
| 61 |
Correct |
1 ms |
364 KB |
Output is correct |
| 62 |
Correct |
1 ms |
364 KB |
Output is correct |
| 63 |
Correct |
1 ms |
364 KB |
Output is correct |
| 64 |
Correct |
144 ms |
26772 KB |
Output is correct |
| 65 |
Correct |
160 ms |
26772 KB |
Output is correct |
| 66 |
Correct |
156 ms |
26772 KB |
Output is correct |
| 67 |
Correct |
183 ms |
26876 KB |
Output is correct |
| 68 |
Correct |
15 ms |
3036 KB |
Output is correct |
| 69 |
Correct |
15 ms |
3056 KB |
Output is correct |
| 70 |
Correct |
16 ms |
3036 KB |
Output is correct |
| 71 |
Correct |
15 ms |
3036 KB |
Output is correct |
| 72 |
Correct |
22 ms |
3036 KB |
Output is correct |
| 73 |
Correct |
16 ms |
3036 KB |
Output is correct |
| 74 |
Correct |
165 ms |
26772 KB |
Output is correct |
| 75 |
Correct |
161 ms |
26732 KB |
Output is correct |
| 76 |
Correct |
157 ms |
26772 KB |
Output is correct |
| 77 |
Correct |
162 ms |
26908 KB |
Output is correct |
| 78 |
Correct |
167 ms |
26772 KB |
Output is correct |
| 79 |
Correct |
168 ms |
26772 KB |
Output is correct |
| 80 |
Correct |
121 ms |
18756 KB |
Output is correct |
| 81 |
Correct |
171 ms |
26772 KB |
Output is correct |
| 82 |
Correct |
162 ms |
26772 KB |
Output is correct |
| 83 |
Correct |
163 ms |
26772 KB |
Output is correct |
| 84 |
Correct |
192 ms |
26772 KB |
Output is correct |
| 85 |
Correct |
156 ms |
26772 KB |
Output is correct |
| 86 |
Correct |
153 ms |
26816 KB |
Output is correct |
| 87 |
Correct |
187 ms |
26748 KB |
Output is correct |
| 88 |
Correct |
176 ms |
26772 KB |
Output is correct |
| 89 |
Correct |
164 ms |
26772 KB |
Output is correct |
| 90 |
Correct |
164 ms |
26772 KB |
Output is correct |
| 91 |
Correct |
167 ms |
26772 KB |
Output is correct |
| 92 |
Correct |
187 ms |
26732 KB |
Output is correct |
