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Submission #966354

# Submission time Handle Problem Language Result Execution time Memory
966354 2024-04-19T18:01:19 Z bachhoangxuan The Big Prize (IOI17_prize) C++17
99.64 / 100
 30 ms 7544 KB 
#include "prize.h"
#include<bits/stdc++.h>
using namespace std;

const int B = 256;
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;
    for(int i=0;i<480;i++){
        vector<int> cc=get(i);
        if(cc[1]==0) return i;
        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;
            bool check=false;
            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);
                    check=true;
                    break;
                }
                if(cc[0]-query(p[mid])) r=mid-1;
                else l=mid+1;
            }
            cnt--;
        }
    }
	return -1;
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:48:18: warning: variable 'check' set but not used [-Wunused-but-set-variable]
   48 |             bool check=false;
      |                  ^~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5996 KB Output is correct
2 Correct 6 ms 5756 KB Output is correct
3 Correct 4 ms 6004 KB Output is correct
4 Correct 7 ms 6260 KB Output is correct
5 Correct 6 ms 6768 KB Output is correct
6 Correct 2 ms 5720 KB Output is correct
7 Correct 5 ms 6012 KB Output is correct
8 Correct 5 ms 6248 KB Output is correct
9 Correct 5 ms 6000 KB Output is correct
10 Correct 7 ms 5776 KB Output is correct

Subtask #2
79.64 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 6264 KB Output is correct
2 Correct 7 ms 5996 KB Output is correct
3 Correct 5 ms 6008 KB Output is correct
4 Correct 7 ms 6272 KB Output is correct
5 Correct 5 ms 6008 KB Output is correct
6 Correct 1 ms 5720 KB Output is correct
7 Correct 6 ms 6008 KB Output is correct
8 Correct 5 ms 6264 KB Output is correct
9 Correct 6 ms 6016 KB Output is correct
10 Correct 7 ms 6028 KB Output is correct
11 Correct 5 ms 6284 KB Output is correct
12 Correct 4 ms 6004 KB Output is correct
13 Correct 9 ms 6096 KB Output is correct
14 Correct 4 ms 5996 KB Output is correct
15 Correct 6 ms 6548 KB Output is correct
16 Correct 21 ms 6300 KB Output is correct
17 Correct 4 ms 6252 KB Output is correct
18 Correct 22 ms 6864 KB Output is correct
19 Correct 4 ms 6008 KB Output is correct
20 Correct 8 ms 6612 KB Output is correct
21 Correct 11 ms 6612 KB Output is correct
22 Correct 5 ms 6028 KB Output is correct
23 Correct 4 ms 5992 KB Output is correct
24 Correct 3 ms 6000 KB Output is correct
25 Correct 16 ms 6000 KB Output is correct
26 Correct 13 ms 6676 KB Output is correct
27 Correct 5 ms 5996 KB Output is correct
28 Correct 23 ms 6752 KB Output is correct
29 Correct 14 ms 7160 KB Output is correct
30 Correct 22 ms 6748 KB Output is correct
31 Correct 4 ms 6000 KB Output is correct
32 Correct 8 ms 6284 KB Output is correct
33 Correct 2 ms 5720 KB Output is correct
34 Correct 9 ms 6420 KB Output is correct
35 Correct 7 ms 6248 KB Output is correct
36 Correct 7 ms 6192 KB Output is correct
37 Correct 4 ms 6296 KB Output is correct
38 Correct 4 ms 6252 KB Output is correct
39 Correct 17 ms 6008 KB Output is correct
40 Correct 28 ms 5996 KB Output is correct
41 Correct 13 ms 6292 KB Output is correct
42 Correct 21 ms 6284 KB Output is correct
43 Correct 13 ms 6300 KB Output is correct
44 Correct 11 ms 6160 KB Output is correct
45 Correct 9 ms 6436 KB Output is correct
46 Correct 3 ms 6000 KB Output is correct
47 Correct 14 ms 6460 KB Output is correct
48 Correct 27 ms 6344 KB Output is correct
49 Correct 5 ms 6288 KB Output is correct
50 Correct 20 ms 7544 KB Output is correct
51 Correct 11 ms 6216 KB Output is correct
52 Correct 4 ms 5996 KB Output is correct
53 Correct 7 ms 5992 KB Output is correct
54 Correct 9 ms 6160 KB Output is correct
55 Correct 3 ms 6004 KB Output is correct
56 Correct 24 ms 6980 KB Output is correct
57 Correct 15 ms 6520 KB Output is correct
58 Correct 19 ms 6648 KB Output is correct
59 Correct 19 ms 6216 KB Output is correct
60 Correct 15 ms 6728 KB Output is correct
61 Correct 6 ms 5796 KB Output is correct
62 Correct 5 ms 5996 KB Output is correct
63 Correct 7 ms 6212 KB Output is correct
64 Correct 6 ms 6512 KB Output is correct
65 Correct 7 ms 6052 KB Output is correct
66 Correct 10 ms 6268 KB Output is correct
67 Correct 7 ms 6524 KB Output is correct
68 Correct 3 ms 5744 KB Output is correct
69 Correct 13 ms 6040 KB Output is correct
70 Correct 12 ms 6268 KB Output is correct
71 Partially correct 24 ms 6748 KB Partially correct - number of queries: 5036
72 Correct 7 ms 6036 KB Output is correct
73 Correct 24 ms 6648 KB Output is correct
74 Partially correct 26 ms 7296 KB Partially correct - number of queries: 5004
75 Correct 7 ms 6032 KB Output is correct
76 Correct 24 ms 6756 KB Output is correct
77 Correct 21 ms 6336 KB Output is correct
78 Correct 9 ms 6268 KB Output is correct
79 Correct 15 ms 6252 KB Output is correct
80 Correct 30 ms 6320 KB Output is correct
81 Correct 21 ms 6760 KB Output is correct
82 Correct 20 ms 6448 KB Output is correct
83 Correct 8 ms 6260 KB Output is correct
84 Correct 19 ms 7020 KB Output is correct
85 Correct 23 ms 6740 KB Output is correct
86 Correct 7 ms 6508 KB Output is correct
87 Correct 7 ms 6764 KB Output is correct
88 Correct 8 ms 6516 KB Output is correct
89 Correct 7 ms 6256 KB Output is correct
90 Correct 7 ms 6256 KB Output is correct
91 Correct 8 ms 6520 KB Output is correct
92 Correct 9 ms 6248 KB Output is correct
93 Correct 9 ms 6000 KB Output is correct
94 Correct 8 ms 6540 KB Output is correct
95 Correct 8 ms 6040 KB Output is correct
96 Correct 9 ms 6292 KB Output is correct
97 Correct 7 ms 6048 KB Output is correct