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Submission #966336

# Submission time Handle Problem Language Result Execution time Memory
966336 2024-04-19T17:45:01 Z bachhoangxuan The Big Prize (IOI17_prize) C++17
20 / 100
 36 ms 7220 KB 
#include "prize.h"
#include<bits/stdc++.h>
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int rand_int(int l,int r){
    return l+(int)(rng()%(r-l+1));
}
const int B = 500;
const int maxn = 2e5+5;

vector<int> res[maxn];
vector<int> get(int x){
    if(!res[x].empty()) return res[x];
    res[x]=ask(x);res[x][1]+=res[x][0];
    return res[x];
}

int N,bit[maxn],Max;
void update(int x){
    for(int i=x+1;i<=N;i+=(i&(-i))) bit[i]++;
}
int query(int x){
    int ans=0;
    for(int i=x+1;i>=1;i-=(i&(-i))) ans+=bit[i];
    return ans;
}

int find_best(int n){
    N=n;rng.seed(998244353);
    for(int i=0;i<400;i++){
        int pos=rand_int(0,n-1);
        vector<int> cc=get(pos);
        if(cc[1]==0) return pos;
        Max=max(Max,cc[1]);
    }
    for(int i=0;i<n;i+=B){
        vector<int> p;
        for(int j=i;j<min(i+B,n);j++) p.push_back(j);
        int cnt=0;
        while(!p.empty()){
            int x=p.back();p.pop_back();
            vector<int> cc=get(x);
            if(cc[1]==0) return x;
            if(cc[1]<Max) update(x);
            else{
                cnt=cc[0]-query(x);
                break;
            }
        }
        while(cnt){
            int l=0,r=(int)p.size()-1;
            while(l<=r){
                int mid=(l+r)>>1;
                vector<int> cc=get(p[mid]);
                if(cc[1]==0) return p[mid];
                if(cc[1]<Max){
                    update(p[mid]);
                    p.erase(p.begin()+mid);
                    break;
                }
                if(cc[0]-query(p[mid])) r=mid-1;
                else l=mid+1;
            }
            cnt--;
        }
    }
	return -1;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 6004 KB Output is correct
2 Correct 5 ms 6272 KB Output is correct
3 Correct 4 ms 6028 KB Output is correct
4 Correct 5 ms 6024 KB Output is correct
5 Correct 4 ms 6024 KB Output is correct
6 Correct 4 ms 6016 KB Output is correct
7 Correct 4 ms 6268 KB Output is correct
8 Correct 5 ms 6164 KB Output is correct
9 Correct 5 ms 6264 KB Output is correct
10 Correct 5 ms 6020 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 6016 KB Output is correct
2 Correct 4 ms 6028 KB Output is correct
3 Correct 4 ms 6012 KB Output is correct
4 Correct 5 ms 6020 KB Output is correct
5 Correct 4 ms 6024 KB Output is correct
6 Correct 4 ms 6004 KB Output is correct
7 Correct 4 ms 6496 KB Output is correct
8 Correct 5 ms 6272 KB Output is correct
9 Correct 5 ms 6020 KB Output is correct
10 Correct 5 ms 6008 KB Output is correct
11 Correct 5 ms 6336 KB Output is correct
12 Correct 3 ms 6260 KB Output is correct
13 Correct 6 ms 6336 KB Output is correct
14 Correct 4 ms 6232 KB Output is correct
15 Correct 7 ms 6532 KB Output is correct
16 Correct 27 ms 6836 KB Output is correct
17 Correct 3 ms 6004 KB Output is correct
18 Correct 23 ms 6296 KB Output is correct
19 Correct 3 ms 6236 KB Output is correct
20 Correct 8 ms 6316 KB Output is correct
21 Correct 10 ms 6060 KB Output is correct
22 Correct 5 ms 6772 KB Output is correct
23 Correct 4 ms 6008 KB Output is correct
24 Correct 4 ms 6004 KB Output is correct
25 Correct 13 ms 6612 KB Output is correct
26 Correct 10 ms 6240 KB Output is correct
27 Correct 5 ms 6268 KB Output is correct
28 Correct 18 ms 6680 KB Output is correct
29 Correct 17 ms 6472 KB Output is correct
30 Correct 19 ms 6540 KB Output is correct
31 Correct 4 ms 6008 KB Output is correct
32 Correct 5 ms 6336 KB Output is correct
33 Correct 2 ms 5976 KB Output is correct
34 Correct 10 ms 7096 KB Output is correct
35 Correct 6 ms 6272 KB Output is correct
36 Correct 8 ms 6612 KB Output is correct
37 Correct 4 ms 6232 KB Output is correct
38 Correct 3 ms 5756 KB Output is correct
39 Correct 10 ms 6460 KB Output is correct
40 Correct 17 ms 6744 KB Output is correct
41 Correct 14 ms 6616 KB Output is correct
42 Correct 14 ms 6484 KB Output is correct
43 Correct 15 ms 6344 KB Output is correct
44 Correct 9 ms 6412 KB Output is correct
45 Correct 8 ms 6380 KB Output is correct
46 Correct 3 ms 5760 KB Output is correct
47 Correct 12 ms 6656 KB Output is correct
48 Correct 16 ms 6972 KB Output is correct
49 Correct 5 ms 6012 KB Output is correct
50 Correct 25 ms 7220 KB Output is correct
51 Correct 10 ms 6008 KB Output is correct
52 Correct 3 ms 6012 KB Output is correct
53 Correct 6 ms 6044 KB Output is correct
54 Correct 13 ms 6380 KB Output is correct
55 Correct 3 ms 5752 KB Output is correct
56 Correct 27 ms 6524 KB Output is correct
57 Correct 18 ms 7108 KB Output is correct
58 Correct 17 ms 6236 KB Output is correct
59 Correct 16 ms 6504 KB Output is correct
60 Correct 15 ms 6504 KB Output is correct
61 Correct 5 ms 6044 KB Output is correct
62 Correct 4 ms 6008 KB Output is correct
63 Correct 6 ms 5760 KB Output is correct
64 Correct 5 ms 6044 KB Output is correct
65 Correct 6 ms 6304 KB Output is correct
66 Correct 5 ms 6024 KB Output is correct
67 Correct 7 ms 6280 KB Output is correct
68 Correct 5 ms 6024 KB Output is correct
69 Correct 5 ms 5760 KB Output is correct
70 Correct 6 ms 6024 KB Output is correct
71 Correct 31 ms 6384 KB Output is correct
72 Correct 7 ms 6320 KB Output is correct
73 Correct 25 ms 6968 KB Output is correct
74 Correct 23 ms 6452 KB Output is correct
75 Correct 5 ms 6056 KB Output is correct
76 Correct 21 ms 6404 KB Output is correct
77 Correct 23 ms 6332 KB Output is correct
78 Correct 8 ms 6264 KB Output is correct
79 Correct 14 ms 6420 KB Output is correct
80 Correct 22 ms 6780 KB Output is correct
81 Correct 25 ms 6820 KB Output is correct
82 Correct 22 ms 6520 KB Output is correct
83 Correct 6 ms 6264 KB Output is correct
84 Correct 23 ms 6536 KB Output is correct
85 Correct 26 ms 6864 KB Output is correct
86 Correct 20 ms 6520 KB Output is correct
87 Correct 6 ms 6264 KB Output is correct
88 Correct 14 ms 6008 KB Output is correct
89 Correct 8 ms 6260 KB Output is correct
90 Correct 5 ms 6524 KB Output is correct
91 Correct 6 ms 6260 KB Output is correct
92 Correct 12 ms 6264 KB Output is correct
93 Incorrect 36 ms 6624 KB Integer -1 violates the range [0, 199999]
94 Halted 0 ms 0 KB -