oj.uz

Submission #1082716

# Submission time Handle Problem Language Result Execution time Memory
1082716 2024-09-01T09:40:43 Z MMihalev The Big Prize (IOI17_prize) C++14
100 / 100
 43 ms 11984 KB 
#include<iostream>
#include<vector>
#include<algorithm>
#include<cmath>
#include<set>
#include "prize.h"
using namespace std;
const int MAX_N=2e5+4;
int asked[MAX_N][2];
bool used[MAX_N];
set<int>kinds;
set<int>idx[MAX_N];
pair<int,int>query(int pos)
{
    if(used[pos])return {asked[pos][0],asked[pos][1]};

    used[pos]=1;
    auto ve=ask(pos);
    asked[pos][0]=ve[0];
    asked[pos][1]=ve[1];
    kinds.insert(ve[0]+ve[1]);
    idx[ve[0]+ve[1]].insert(pos);
    return {ve[0],ve[1]};
}
bool useless(int l,int r)
{
    for(int x:kinds)
    {
        auto it1=idx[x].lower_bound(l);
        auto it2=idx[x].upper_bound(r);
        if(it1!=idx[x].begin() && it2!=idx[x].end())
        {
            it1--;
            int pos1=(*it1);
            int pos2=(*it2);
            if(query(pos2).first-query(pos1).first==0)return 1;
        }
    }
    return 0;
}
int ans=-1;
void rec(int l,int r)
{
    if(l>r)return;
    if(ans!=-1)return;
    int mid=(l+r)/2;
    auto cur=query(mid);
    if(cur.first+cur.second==0){ans=mid;return;}
    if(!useless(l,mid-1))rec(l,mid-1);
    if(!useless(mid+1,r))rec(mid+1,r);
}

int find_best(int n)
{
    rec(0,n-1);
    return ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 9816 KB Output is correct
2 Correct 6 ms 9816 KB Output is correct
3 Correct 4 ms 9816 KB Output is correct
4 Correct 5 ms 9816 KB Output is correct
5 Correct 5 ms 9816 KB Output is correct
6 Correct 5 ms 9816 KB Output is correct
7 Correct 4 ms 9816 KB Output is correct
8 Correct 4 ms 9816 KB Output is correct
9 Correct 4 ms 9816 KB Output is correct
10 Correct 5 ms 9816 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 9816 KB Output is correct
2 Correct 4 ms 9816 KB Output is correct
3 Correct 4 ms 10072 KB Output is correct
4 Correct 5 ms 9816 KB Output is correct
5 Correct 5 ms 9832 KB Output is correct
6 Correct 4 ms 9816 KB Output is correct
7 Correct 4 ms 9816 KB Output is correct
8 Correct 7 ms 9816 KB Output is correct
9 Correct 4 ms 9816 KB Output is correct
10 Correct 4 ms 9816 KB Output is correct
11 Correct 6 ms 10140 KB Output is correct
12 Correct 4 ms 9816 KB Output is correct
13 Correct 7 ms 10584 KB Output is correct
14 Correct 6 ms 9816 KB Output is correct
15 Correct 7 ms 10072 KB Output is correct
16 Correct 26 ms 11296 KB Output is correct
17 Correct 4 ms 9816 KB Output is correct
18 Correct 43 ms 11916 KB Output is correct
19 Correct 4 ms 9816 KB Output is correct
20 Correct 14 ms 10072 KB Output is correct
21 Correct 16 ms 10328 KB Output is correct
22 Correct 6 ms 9816 KB Output is correct
23 Correct 5 ms 9816 KB Output is correct
24 Correct 4 ms 9816 KB Output is correct
25 Correct 19 ms 10776 KB Output is correct
26 Correct 15 ms 10744 KB Output is correct
27 Correct 4 ms 9952 KB Output is correct
28 Correct 27 ms 11344 KB Output is correct
29 Correct 16 ms 11344 KB Output is correct
30 Correct 24 ms 11600 KB Output is correct
31 Correct 5 ms 9816 KB Output is correct
32 Correct 6 ms 10328 KB Output is correct
33 Correct 4 ms 9816 KB Output is correct
34 Correct 17 ms 10304 KB Output is correct
35 Correct 5 ms 10072 KB Output is correct
36 Correct 7 ms 10072 KB Output is correct
37 Correct 5 ms 9816 KB Output is correct
38 Correct 4 ms 9816 KB Output is correct
39 Correct 16 ms 10460 KB Output is correct
40 Correct 37 ms 11676 KB Output is correct
41 Correct 22 ms 10768 KB Output is correct
42 Correct 15 ms 10724 KB Output is correct
43 Correct 16 ms 10852 KB Output is correct
44 Correct 11 ms 10584 KB Output is correct
45 Correct 9 ms 10328 KB Output is correct
46 Correct 5 ms 9816 KB Output is correct
47 Correct 12 ms 10832 KB Output is correct
48 Correct 20 ms 11280 KB Output is correct
49 Correct 7 ms 10072 KB Output is correct
50 Correct 38 ms 11672 KB Output is correct
51 Correct 18 ms 10420 KB Output is correct
52 Correct 5 ms 9816 KB Output is correct
53 Correct 5 ms 10328 KB Output is correct
54 Correct 15 ms 10584 KB Output is correct
55 Correct 4 ms 9816 KB Output is correct
56 Correct 42 ms 11764 KB Output is correct
57 Correct 23 ms 11088 KB Output is correct
58 Correct 21 ms 11184 KB Output is correct
59 Correct 20 ms 11052 KB Output is correct
60 Correct 14 ms 10832 KB Output is correct
61 Correct 5 ms 10072 KB Output is correct
62 Correct 4 ms 10064 KB Output is correct
63 Correct 5 ms 10024 KB Output is correct
64 Correct 4 ms 9968 KB Output is correct
65 Correct 4 ms 9816 KB Output is correct
66 Correct 5 ms 9816 KB Output is correct
67 Correct 5 ms 9816 KB Output is correct
68 Correct 4 ms 9816 KB Output is correct
69 Correct 4 ms 9816 KB Output is correct
70 Correct 5 ms 9816 KB Output is correct
71 Correct 38 ms 11604 KB Output is correct
72 Correct 8 ms 10584 KB Output is correct
73 Correct 28 ms 11600 KB Output is correct
74 Correct 29 ms 11820 KB Output is correct
75 Correct 6 ms 10072 KB Output is correct
76 Correct 27 ms 11656 KB Output is correct
77 Correct 29 ms 11856 KB Output is correct
78 Correct 8 ms 10584 KB Output is correct
79 Correct 20 ms 11496 KB Output is correct
80 Correct 40 ms 11856 KB Output is correct
81 Correct 26 ms 11600 KB Output is correct
82 Correct 41 ms 11600 KB Output is correct
83 Correct 5 ms 10072 KB Output is correct
84 Correct 29 ms 11708 KB Output is correct
85 Correct 32 ms 11984 KB Output is correct
86 Correct 12 ms 10392 KB Output is correct
87 Correct 8 ms 10072 KB Output is correct
88 Correct 8 ms 10328 KB Output is correct
89 Correct 7 ms 10328 KB Output is correct
90 Correct 5 ms 10072 KB Output is correct
91 Correct 7 ms 10068 KB Output is correct
92 Correct 4 ms 9816 KB Output is correct
93 Correct 8 ms 10328 KB Output is correct
94 Correct 6 ms 10260 KB Output is correct
95 Correct 7 ms 10328 KB Output is correct
96 Correct 6 ms 10328 KB Output is correct
97 Correct 6 ms 9816 KB Output is correct