#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> lcache;
vector<int> rcache;
int n;
pair<int,int> askmap(int i){
//cout<<"askmap "<<i<<endl;
if (i>=n){
return {1e9,1e9};
}
assert(i<n);
if (lcache[i]==-1){
vector<int> res = ask(i);
lcache[i] = res[0];
rcache[i] = res[1];
}
return {lcache[i],rcache[i]};
}
int asksum(int i){
auto p = askmap(i);
return p.first+p.second;
}
int lsum = 0;
int dnc(int s, int e, int numexp, int prefexp, int suffexp){
// numexp expensive things in range s->e
//cout<<s<<' '<<e<<' '<<numexp<<' '<<prefexp<<' '<<suffexp<<endl;
if (e-s+1==numexp){
for (int i = s; i<=e; i++){
if (asksum(i)==0){return i;}
}
return -1;
}
if (numexp==0){
return -1;
}
// there is at least one lollipop
int m = (s+e)/2;
for (int i = m; i>=s; i--){
if (asksum(i)==lsum){
auto m = askmap(i);
int lval = m.first;
int rval = m.second;
int dl = dnc(s,i-1,lval-prefexp, prefexp, rval);
if (dl!=-1){return dl;}
int dr = dnc(i+1,e,rval-suffexp, lval, suffexp);
if (dr!=-1){return dr;}
return -1;
} else if (asksum(i)==0){
return i;
}
}
for (int i = m+1; i<=e; i++){
if (asksum(i)==lsum){
auto m = askmap(i);
int lval = m.first;
int rval = m.second;
//int dl = dnc(s,i-1,lval-prefexp, prefexp, rval);
//if (dl!=-1){return dl;}
int dr = dnc(i+1,e,rval-suffexp, lval, suffexp);
if (dr!=-1){return dr;}
return -1;
} else if (asksum(i)==0){
return i;
}
}
assert(1==0);
}
int find_best(int N) {
n=N;
lcache.resize(n,-1);
rcache.resize(n,-1);
if (n<=500){
for (int i = 0; i < n; i++) {
if(asksum(i) == 0){
return i;
}
}
assert(1==0);
}
int m = (n-1)/2;
for (int i = m-236; i<m+236; i++){
int res = asksum(i);
if (res==0){return i;}
lsum = max(res,lsum);
}
return dnc(0,n-1,lsum,0,0);
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
1920 KB |
Output is correct |
| 2 |
Correct |
6 ms |
1920 KB |
Output is correct |
| 3 |
Correct |
5 ms |
1920 KB |
Output is correct |
| 4 |
Correct |
7 ms |
1920 KB |
Output is correct |
| 5 |
Correct |
4 ms |
1920 KB |
Output is correct |
| 6 |
Correct |
7 ms |
1952 KB |
Output is correct |
| 7 |
Correct |
4 ms |
1920 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1920 KB |
Output is correct |
| 9 |
Correct |
4 ms |
1920 KB |
Output is correct |
| 10 |
Correct |
6 ms |
1920 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
1920 KB |
Output is correct |
| 2 |
Correct |
6 ms |
1920 KB |
Output is correct |
| 3 |
Correct |
5 ms |
1920 KB |
Output is correct |
| 4 |
Correct |
5 ms |
1920 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1912 KB |
Output is correct |
| 6 |
Correct |
4 ms |
1920 KB |
Output is correct |
| 7 |
Correct |
4 ms |
1912 KB |
Output is correct |
| 8 |
Correct |
4 ms |
1920 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1920 KB |
Output is correct |
| 10 |
Correct |
7 ms |
1920 KB |
Output is correct |
| 11 |
Correct |
8 ms |
2040 KB |
Output is correct |
| 12 |
Correct |
4 ms |
1920 KB |
Output is correct |
| 13 |
Correct |
12 ms |
1920 KB |
Output is correct |
| 14 |
Correct |
7 ms |
512 KB |
Output is correct |
| 15 |
Correct |
10 ms |
1912 KB |
Output is correct |
| 16 |
Correct |
36 ms |
2040 KB |
Output is correct |
| 17 |
Correct |
6 ms |
1920 KB |
Output is correct |
| 18 |
Partially correct |
44 ms |
1920 KB |
Partially correct - number of queries: 5223 |
| 19 |
Correct |
7 ms |
1920 KB |
Output is correct |
| 20 |
Correct |
16 ms |
1152 KB |
Output is correct |
| 21 |
Correct |
22 ms |
1920 KB |
Output is correct |
| 22 |
Correct |
6 ms |
1912 KB |
Output is correct |
| 23 |
Correct |
5 ms |
1920 KB |
Output is correct |
| 24 |
Correct |
6 ms |
2048 KB |
Output is correct |
| 25 |
Correct |
29 ms |
2040 KB |
Output is correct |
| 26 |
Correct |
23 ms |
1920 KB |
Output is correct |
| 27 |
Correct |
7 ms |
1920 KB |
Output is correct |
| 28 |
Correct |
45 ms |
1920 KB |
Output is correct |
| 29 |
Correct |
37 ms |
1912 KB |
Output is correct |
| 30 |
Partially correct |
45 ms |
1920 KB |
Partially correct - number of queries: 5191 |
| 31 |
Correct |
4 ms |
1912 KB |
Output is correct |
| 32 |
Correct |
9 ms |
1920 KB |
Output is correct |
| 33 |
Correct |
0 ms |
256 KB |
Output is correct |
| 34 |
Correct |
19 ms |
1912 KB |
Output is correct |
| 35 |
Correct |
10 ms |
1920 KB |
Output is correct |
| 36 |
Correct |
10 ms |
1920 KB |
Output is correct |
| 37 |
Correct |
6 ms |
1920 KB |
Output is correct |
| 38 |
Correct |
4 ms |
2032 KB |
Output is correct |
| 39 |
Correct |
21 ms |
1912 KB |
Output is correct |
| 40 |
Correct |
25 ms |
1900 KB |
Output is correct |
| 41 |
Correct |
18 ms |
1920 KB |
Output is correct |
| 42 |
Correct |
28 ms |
1980 KB |
Output is correct |
| 43 |
Correct |
32 ms |
1948 KB |
Output is correct |
| 44 |
Correct |
23 ms |
1920 KB |
Output is correct |
| 45 |
Correct |
25 ms |
1920 KB |
Output is correct |
| 46 |
Correct |
4 ms |
1920 KB |
Output is correct |
| 47 |
Correct |
14 ms |
1980 KB |
Output is correct |
| 48 |
Correct |
31 ms |
1920 KB |
Output is correct |
| 49 |
Correct |
11 ms |
2040 KB |
Output is correct |
| 50 |
Partially correct |
55 ms |
1920 KB |
Partially correct - number of queries: 5229 |
| 51 |
Correct |
21 ms |
1920 KB |
Output is correct |
| 52 |
Correct |
7 ms |
1912 KB |
Output is correct |
| 53 |
Correct |
8 ms |
1920 KB |
Output is correct |
| 54 |
Correct |
30 ms |
1912 KB |
Output is correct |
| 55 |
Correct |
8 ms |
1920 KB |
Output is correct |
| 56 |
Partially correct |
64 ms |
1920 KB |
Partially correct - number of queries: 5228 |
| 57 |
Correct |
35 ms |
1912 KB |
Output is correct |
| 58 |
Correct |
44 ms |
1920 KB |
Output is correct |
| 59 |
Correct |
29 ms |
1912 KB |
Output is correct |
| 60 |
Correct |
23 ms |
1912 KB |
Output is correct |
| 61 |
Correct |
9 ms |
1912 KB |
Output is correct |
| 62 |
Correct |
6 ms |
1952 KB |
Output is correct |
| 63 |
Correct |
6 ms |
1920 KB |
Output is correct |
| 64 |
Correct |
9 ms |
1920 KB |
Output is correct |
| 65 |
Correct |
9 ms |
1920 KB |
Output is correct |
| 66 |
Correct |
7 ms |
1892 KB |
Output is correct |
| 67 |
Correct |
8 ms |
1920 KB |
Output is correct |
| 68 |
Correct |
10 ms |
1920 KB |
Output is correct |
| 69 |
Correct |
10 ms |
1984 KB |
Output is correct |
| 70 |
Correct |
11 ms |
1896 KB |
Output is correct |
| 71 |
Partially correct |
60 ms |
2040 KB |
Partially correct - number of queries: 5230 |
| 72 |
Correct |
14 ms |
1920 KB |
Output is correct |
| 73 |
Partially correct |
40 ms |
1920 KB |
Partially correct - number of queries: 5167 |
| 74 |
Partially correct |
56 ms |
1952 KB |
Partially correct - number of queries: 5194 |
| 75 |
Correct |
9 ms |
1920 KB |
Output is correct |
| 76 |
Correct |
38 ms |
1920 KB |
Output is correct |
| 77 |
Partially correct |
87 ms |
1920 KB |
Partially correct - number of queries: 5352 |
| 78 |
Correct |
16 ms |
2040 KB |
Output is correct |
| 79 |
Correct |
30 ms |
1948 KB |
Output is correct |
| 80 |
Partially correct |
59 ms |
1952 KB |
Partially correct - number of queries: 5323 |
| 81 |
Partially correct |
53 ms |
1920 KB |
Partially correct - number of queries: 5343 |
| 82 |
Partially correct |
47 ms |
1920 KB |
Partially correct - number of queries: 5256 |
| 83 |
Correct |
8 ms |
1920 KB |
Output is correct |
| 84 |
Correct |
47 ms |
1948 KB |
Output is correct |
| 85 |
Partially correct |
48 ms |
1948 KB |
Partially correct - number of queries: 5321 |
| 86 |
Correct |
11 ms |
1920 KB |
Output is correct |
| 87 |
Correct |
7 ms |
1952 KB |
Output is correct |
| 88 |
Correct |
9 ms |
1920 KB |
Output is correct |
| 89 |
Correct |
11 ms |
1920 KB |
Output is correct |
| 90 |
Correct |
7 ms |
1920 KB |
Output is correct |
| 91 |
Correct |
8 ms |
1920 KB |
Output is correct |
| 92 |
Correct |
10 ms |
1920 KB |
Output is correct |
| 93 |
Correct |
11 ms |
1952 KB |
Output is correct |
| 94 |
Correct |
10 ms |
1920 KB |
Output is correct |
| 95 |
Correct |
9 ms |
1920 KB |
Output is correct |
| 96 |
Correct |
9 ms |
1920 KB |
Output is correct |
| 97 |
Correct |
6 ms |
1920 KB |
Output is correct |
