#include <bits/stdc++.h>
#include "xylophone.h"
using namespace std;
namespace interact{
void A(int pos, int val){
// cout << pos << ": " << val+1 << endl;
answer(pos+1, val+1);
// cout << "FIN" << endl;
}
int Q(int l, int r){
return query(l+1, r+1);
}
};
int find_n(int n){
int l = 0, r = n-1;
int last = interact::Q(0, n-1);
while (l < r){
int m = (l+r)>>1;
int q = interact::Q(0, m);
if (last == q){
r = m;
}
else{
l = m+1;
}
}
// cout << "P: " << l << endl;
return l;
}
void solve(int n){
vector<bool> a(n);
int posmax = find_n(n);
interact::A(posmax, n-1);
int last = n-1, last1;
a.back() = 1;
for (int i=posmax-1; i>=0; i--){
int cdelta = interact::Q(i, i+1);
int first = last - cdelta;
int second = last + cdelta;
int realval;
if (first < 0 || a[first]){
realval = second;
}
else if (second >= n || a[second]){
realval = first;
}
else{
int cdelta1 = interact::Q(i, i+2);
if (cdelta1 == cdelta + abs(last - last1)){
// last1 -> last -> i
if (last1 > last){
// last > i
realval = first;
}
else{
realval = second;
}
}
else{
if (last1 < last){
realval = first;
}
else{
realval = second;
}
}
}
interact::A(i, realval);
last1 = last;
last = realval;
a[realval] = true;
}
last = n-1;
for (int i=posmax+1; i<n; i++){
int cdelta = interact::Q(i-1, i);
int first = last - cdelta;
int second = last + cdelta;
int realval;
if (first < 0 || a[first]){
realval = second;
}
else if (second >= n || a[second]){
realval = first;
}
else{
int cdelta1 = interact::Q(i-2, i);
if (cdelta1 == cdelta + abs(last - last1)){
// last1 -> last -> i
if (last1 > last){
// last > i
realval = first;
}
else{
realval = second;
}
}
else{
if (last1 < last){
realval = first;
}
else{
realval = second;
}
}
}
interact::A(i, realval);
last1 = last;
last = realval;
a[realval] = true;
}
}
Compilation message
xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:52:5: warning: 'last1' may be used uninitialized in this function [-Wmaybe-uninitialized]
52 | if (last1 > last){
| ^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
Output is correct |
| 2 |
Correct |
1 ms |
208 KB |
Output is correct |
| 3 |
Correct |
2 ms |
208 KB |
Output is correct |
| 4 |
Correct |
2 ms |
208 KB |
Output is correct |
| 5 |
Correct |
1 ms |
208 KB |
Output is correct |
| 6 |
Correct |
2 ms |
208 KB |
Output is correct |
| 7 |
Correct |
2 ms |
208 KB |
Output is correct |
| 8 |
Correct |
2 ms |
208 KB |
Output is correct |
| 9 |
Correct |
2 ms |
208 KB |
Output is correct |
| 10 |
Correct |
1 ms |
208 KB |
Output is correct |
| 11 |
Correct |
2 ms |
208 KB |
Output is correct |
| 12 |
Correct |
2 ms |
208 KB |
Output is correct |
| 13 |
Correct |
2 ms |
208 KB |
Output is correct |
| 14 |
Correct |
2 ms |
208 KB |
Output is correct |
| 15 |
Correct |
1 ms |
208 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
Output is correct |
| 2 |
Correct |
1 ms |
208 KB |
Output is correct |
| 3 |
Correct |
2 ms |
208 KB |
Output is correct |
| 4 |
Correct |
2 ms |
208 KB |
Output is correct |
| 5 |
Correct |
1 ms |
208 KB |
Output is correct |
| 6 |
Correct |
2 ms |
208 KB |
Output is correct |
| 7 |
Correct |
2 ms |
208 KB |
Output is correct |
| 8 |
Correct |
2 ms |
208 KB |
Output is correct |
| 9 |
Correct |
2 ms |
208 KB |
Output is correct |
| 10 |
Correct |
1 ms |
208 KB |
Output is correct |
| 11 |
Correct |
2 ms |
208 KB |
Output is correct |
| 12 |
Correct |
2 ms |
208 KB |
Output is correct |
| 13 |
Correct |
2 ms |
208 KB |
Output is correct |
| 14 |
Correct |
2 ms |
208 KB |
Output is correct |
| 15 |
Correct |
1 ms |
208 KB |
Output is correct |
| 16 |
Correct |
3 ms |
208 KB |
Output is correct |
| 17 |
Correct |
8 ms |
208 KB |
Output is correct |
| 18 |
Correct |
14 ms |
208 KB |
Output is correct |
| 19 |
Correct |
10 ms |
208 KB |
Output is correct |
| 20 |
Correct |
12 ms |
208 KB |
Output is correct |
| 21 |
Correct |
12 ms |
208 KB |
Output is correct |
| 22 |
Correct |
10 ms |
208 KB |
Output is correct |
| 23 |
Correct |
9 ms |
208 KB |
Output is correct |
| 24 |
Correct |
9 ms |
208 KB |
Output is correct |
| 25 |
Correct |
11 ms |
208 KB |
Output is correct |
| 26 |
Correct |
15 ms |
208 KB |
Output is correct |
| 27 |
Correct |
14 ms |
208 KB |
Output is correct |
| 28 |
Correct |
11 ms |
208 KB |
Output is correct |
| 29 |
Correct |
12 ms |
208 KB |
Output is correct |
| 30 |
Correct |
12 ms |
208 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
Output is correct |
| 2 |
Correct |
1 ms |
208 KB |
Output is correct |
| 3 |
Correct |
2 ms |
208 KB |
Output is correct |
| 4 |
Correct |
2 ms |
208 KB |
Output is correct |
| 5 |
Correct |
1 ms |
208 KB |
Output is correct |
| 6 |
Correct |
2 ms |
208 KB |
Output is correct |
| 7 |
Correct |
2 ms |
208 KB |
Output is correct |
| 8 |
Correct |
2 ms |
208 KB |
Output is correct |
| 9 |
Correct |
2 ms |
208 KB |
Output is correct |
| 10 |
Correct |
1 ms |
208 KB |
Output is correct |
| 11 |
Correct |
2 ms |
208 KB |
Output is correct |
| 12 |
Correct |
2 ms |
208 KB |
Output is correct |
| 13 |
Correct |
2 ms |
208 KB |
Output is correct |
| 14 |
Correct |
2 ms |
208 KB |
Output is correct |
| 15 |
Correct |
1 ms |
208 KB |
Output is correct |
| 16 |
Correct |
3 ms |
208 KB |
Output is correct |
| 17 |
Correct |
8 ms |
208 KB |
Output is correct |
| 18 |
Correct |
14 ms |
208 KB |
Output is correct |
| 19 |
Correct |
10 ms |
208 KB |
Output is correct |
| 20 |
Correct |
12 ms |
208 KB |
Output is correct |
| 21 |
Correct |
12 ms |
208 KB |
Output is correct |
| 22 |
Correct |
10 ms |
208 KB |
Output is correct |
| 23 |
Correct |
9 ms |
208 KB |
Output is correct |
| 24 |
Correct |
9 ms |
208 KB |
Output is correct |
| 25 |
Correct |
11 ms |
208 KB |
Output is correct |
| 26 |
Correct |
15 ms |
208 KB |
Output is correct |
| 27 |
Correct |
14 ms |
208 KB |
Output is correct |
| 28 |
Correct |
11 ms |
208 KB |
Output is correct |
| 29 |
Correct |
12 ms |
208 KB |
Output is correct |
| 30 |
Correct |
12 ms |
208 KB |
Output is correct |
| 31 |
Correct |
26 ms |
208 KB |
Output is correct |
| 32 |
Correct |
35 ms |
208 KB |
Output is correct |
| 33 |
Correct |
58 ms |
208 KB |
Output is correct |
| 34 |
Correct |
60 ms |
208 KB |
Output is correct |
| 35 |
Correct |
27 ms |
208 KB |
Output is correct |
| 36 |
Correct |
49 ms |
208 KB |
Output is correct |
| 37 |
Correct |
56 ms |
208 KB |
Output is correct |
| 38 |
Correct |
52 ms |
208 KB |
Output is correct |
| 39 |
Correct |
69 ms |
208 KB |
Output is correct |
| 40 |
Correct |
55 ms |
208 KB |
Output is correct |
| 41 |
Correct |
68 ms |
208 KB |
Output is correct |
| 42 |
Correct |
54 ms |
208 KB |
Output is correct |
| 43 |
Correct |
54 ms |
208 KB |
Output is correct |
| 44 |
Correct |
51 ms |
208 KB |
Output is correct |
| 45 |
Correct |
58 ms |
208 KB |
Output is correct |
| 46 |
Correct |
59 ms |
208 KB |
Output is correct |
| 47 |
Correct |
72 ms |
208 KB |
Output is correct |
| 48 |
Correct |
70 ms |
208 KB |
Output is correct |
| 49 |
Correct |
31 ms |
208 KB |
Output is correct |
| 50 |
Correct |
57 ms |
208 KB |
Output is correct |
| 51 |
Correct |
69 ms |
208 KB |
Output is correct |
| 52 |
Correct |
59 ms |
208 KB |
Output is correct |
| 53 |
Correct |
63 ms |
208 KB |
Output is correct |
| 54 |
Correct |
50 ms |
208 KB |
Output is correct |
| 55 |
Correct |
55 ms |
208 KB |
Output is correct |
| 56 |
Correct |
46 ms |
208 KB |
Output is correct |
| 57 |
Correct |
56 ms |
208 KB |
Output is correct |
| 58 |
Correct |
69 ms |
208 KB |
Output is correct |
| 59 |
Correct |
67 ms |
208 KB |
Output is correct |
| 60 |
Correct |
66 ms |
208 KB |
Output is correct |
