#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 200010;
#define oo 2000000000
bool asked[N];
vector<int> answer[N] , v;
vector< pair<int,int> > v2;
int mx = 0 ;
vector<int> get(int i){
if(asked[i])
return answer[i];
asked[i] = true;
answer[i] = ask(i);
if(answer[i][0] + answer[i][1] == mx) v2.push_back(make_pair(answer[i][0],i)); else v.push_back(i);
return answer[i];
}
int solve(int s,int e){
int res = e;
vector<int> v1 = get(s);
while(e >= s){
int mid = (s + e) / 2;
vector<int> cur = get(mid);
if(cur[0] + cur[1] == mx && cur[0] == v1[0])
s = mid + 1;
else {
res = mid;
e = mid - 1;
}
}
return res;
}
int find_best(int n) {
int num = sqrt(n) - 2;
int it = 0;
if(n <= 5000){
for(int i=0;i<n;i++){
vector<int> cur = get(i);
if(cur[0]+cur[1] == 0) return i;
}
}
for(int i=0;i<n && it < 480;i+=num){
vector<int> res = get(i);
int cur = res[0] + res[1];
mx = max(mx,cur);
it++;
}
for(int i=1;i<n && it < 480;i+=num){
it++;
vector<int> res = get(i);
int cur = res[0] + res[1];
mx = max(mx,cur);
}
int low = 0;
while(true){
int high = n - 1;
vector<int> cur = get(low);
if(cur[0] + cur[1] == 0) return low;
if(cur[0] + cur[1] != mx){
low++;
continue;
}
for(int i=0;i<v2.size();i++){
if(v2[i].second >= low && v2[i].first != cur[0]){
high = min(high,v2[i].second);
}
else if(v2[i].second >= low){
low = max(low,v2[i].second);
}
}
bool flag = false;
for(int i=0;i<v.size();i++){
vector<int> tmp = get(v[i]);
if(tmp[0] + tmp[1] == 0) return v[i];
if(v[i] > low){
high = min(high,v[i]);
}
}
if(flag) continue;
low = solve(low,high);
}
return 0;
}
Compilation message
prize.cpp: In function 'int find_best(int)':
prize.cpp:66:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<v2.size();i++){
^
prize.cpp:75:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<v.size();i++){
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 2 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 3 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 4 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 5 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 6 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 7 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 8 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 9 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 10 |
Correct |
3 ms |
6912 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 2 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 3 |
Correct |
3 ms |
6912 KB |
Output is correct |
| 4 |
Correct |
3 ms |
6912 KB |
Output is correct |
| 5 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 6 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 7 |
Correct |
13 ms |
6912 KB |
Output is correct |
| 8 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 9 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 10 |
Correct |
3 ms |
6912 KB |
Output is correct |
| 11 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 12 |
Correct |
9 ms |
6912 KB |
Output is correct |
| 13 |
Correct |
3 ms |
6912 KB |
Output is correct |
| 14 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 15 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 16 |
Correct |
43 ms |
7052 KB |
Output is correct |
| 17 |
Correct |
3 ms |
6912 KB |
Output is correct |
| 18 |
Correct |
69 ms |
7232 KB |
Output is correct |
| 19 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 20 |
Correct |
6 ms |
7052 KB |
Output is correct |
| 21 |
Correct |
26 ms |
7052 KB |
Output is correct |
| 22 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 23 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 24 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 25 |
Correct |
13 ms |
7052 KB |
Output is correct |
| 26 |
Correct |
9 ms |
7052 KB |
Output is correct |
| 27 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 28 |
Correct |
9 ms |
7052 KB |
Output is correct |
| 29 |
Correct |
16 ms |
7052 KB |
Output is correct |
| 30 |
Correct |
53 ms |
7232 KB |
Output is correct |
| 31 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 32 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 33 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 34 |
Correct |
9 ms |
7052 KB |
Output is correct |
| 35 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 36 |
Correct |
13 ms |
7052 KB |
Output is correct |
| 37 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 38 |
Correct |
3 ms |
6912 KB |
Output is correct |
| 39 |
Correct |
9 ms |
7052 KB |
Output is correct |
| 40 |
Correct |
39 ms |
7052 KB |
Output is correct |
| 41 |
Correct |
23 ms |
7052 KB |
Output is correct |
| 42 |
Correct |
36 ms |
7052 KB |
Output is correct |
| 43 |
Correct |
13 ms |
7052 KB |
Output is correct |
| 44 |
Correct |
16 ms |
7052 KB |
Output is correct |
| 45 |
Correct |
0 ms |
7052 KB |
Output is correct |
| 46 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 47 |
Correct |
0 ms |
7052 KB |
Output is correct |
| 48 |
Correct |
29 ms |
7052 KB |
Output is correct |
| 49 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 50 |
Correct |
26 ms |
7232 KB |
Output is correct |
| 51 |
Correct |
13 ms |
7052 KB |
Output is correct |
| 52 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 53 |
Correct |
9 ms |
6912 KB |
Output is correct |
| 54 |
Correct |
0 ms |
7052 KB |
Output is correct |
| 55 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 56 |
Correct |
46 ms |
7232 KB |
Output is correct |
| 57 |
Correct |
0 ms |
7052 KB |
Output is correct |
| 58 |
Correct |
13 ms |
7052 KB |
Output is correct |
| 59 |
Correct |
13 ms |
7052 KB |
Output is correct |
| 60 |
Correct |
9 ms |
7052 KB |
Output is correct |
| 61 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 62 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 63 |
Correct |
3 ms |
6912 KB |
Output is correct |
| 64 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 65 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 66 |
Correct |
13 ms |
6912 KB |
Output is correct |
| 67 |
Correct |
3 ms |
6912 KB |
Output is correct |
| 68 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 69 |
Correct |
9 ms |
6912 KB |
Output is correct |
| 70 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 71 |
Correct |
33 ms |
7232 KB |
Output is correct |
| 72 |
Correct |
9 ms |
6912 KB |
Output is correct |
| 73 |
Correct |
13 ms |
7232 KB |
Output is correct |
| 74 |
Correct |
63 ms |
7232 KB |
Output is correct |
| 75 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 76 |
Correct |
26 ms |
7052 KB |
Output is correct |
| 77 |
Correct |
56 ms |
7232 KB |
Output is correct |
| 78 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 79 |
Correct |
9 ms |
7052 KB |
Output is correct |
| 80 |
Correct |
46 ms |
7232 KB |
Output is correct |
| 81 |
Correct |
66 ms |
7232 KB |
Output is correct |
| 82 |
Correct |
46 ms |
7232 KB |
Output is correct |
| 83 |
Correct |
3 ms |
6912 KB |
Output is correct |
| 84 |
Correct |
19 ms |
7052 KB |
Output is correct |
| 85 |
Correct |
26 ms |
7232 KB |
Output is correct |
| 86 |
Correct |
13 ms |
7052 KB |
Output is correct |
| 87 |
Correct |
6 ms |
6912 KB |
Output is correct |
| 88 |
Correct |
16 ms |
7052 KB |
Output is correct |
| 89 |
Correct |
26 ms |
7052 KB |
Output is correct |
| 90 |
Correct |
0 ms |
6912 KB |
Output is correct |
| 91 |
Correct |
9 ms |
7052 KB |
Output is correct |
| 92 |
Correct |
39 ms |
7052 KB |
Output is correct |
| 93 |
Correct |
9 ms |
7216 KB |
Output is correct |
| 94 |
Correct |
13 ms |
7216 KB |
Output is correct |
| 95 |
Correct |
13 ms |
7216 KB |
Output is correct |
| 96 |
Correct |
16 ms |
7216 KB |
Output is correct |
| 97 |
Correct |
23 ms |
7216 KB |
Output is correct |
