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Submission #1008151

# Submission time Handle Problem Language Result Execution time Memory
1008151 2024-06-26T08:00:32 Z bachhoangxuan The Big Prize (IOI17_prize) C++17
99.7 / 100
 31 ms 6488 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<474;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;
            }
          	p.erase(p.begin(),p.begin()+l);
            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 5972 KB Output is correct
2 Correct 4 ms 5720 KB Output is correct
3 Correct 4 ms 5720 KB Output is correct
4 Correct 9 ms 5976 KB Output is correct
5 Correct 5 ms 5760 KB Output is correct
6 Correct 1 ms 5720 KB Output is correct
7 Correct 5 ms 5720 KB Output is correct
8 Correct 5 ms 5720 KB Output is correct
9 Correct 5 ms 5728 KB Output is correct
10 Correct 6 ms 5720 KB Output is correct

Subtask #2
79.7 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5720 KB Output is correct
2 Correct 8 ms 6256 KB Output is correct
3 Correct 5 ms 5720 KB Output is correct
4 Correct 11 ms 5976 KB Output is correct
5 Correct 6 ms 5748 KB Output is correct
6 Correct 1 ms 5720 KB Output is correct
7 Correct 8 ms 5720 KB Output is correct
8 Correct 5 ms 6008 KB Output is correct
9 Correct 4 ms 5720 KB Output is correct
10 Correct 6 ms 5720 KB Output is correct
11 Correct 6 ms 5844 KB Output is correct
12 Correct 4 ms 5728 KB Output is correct
13 Correct 12 ms 5720 KB Output is correct
14 Correct 6 ms 5720 KB Output is correct
15 Correct 5 ms 5720 KB Output is correct
16 Correct 23 ms 6224 KB Output is correct
17 Correct 4 ms 5720 KB Output is correct
18 Correct 24 ms 6216 KB Output is correct
19 Correct 3 ms 5720 KB Output is correct
20 Correct 6 ms 5720 KB Output is correct
21 Correct 12 ms 5976 KB Output is correct
22 Correct 5 ms 5720 KB Output is correct
23 Correct 5 ms 5720 KB Output is correct
24 Correct 4 ms 5720 KB Output is correct
25 Correct 11 ms 6104 KB Output is correct
26 Correct 13 ms 5976 KB Output is correct
27 Correct 6 ms 5720 KB Output is correct
28 Correct 21 ms 5976 KB Output is correct
29 Correct 15 ms 5976 KB Output is correct
30 Correct 19 ms 6232 KB Output is correct
31 Correct 3 ms 5720 KB Output is correct
32 Correct 5 ms 5720 KB Output is correct
33 Correct 1 ms 5720 KB Output is correct
34 Correct 11 ms 6388 KB Output is correct
35 Correct 5 ms 5720 KB Output is correct
36 Correct 7 ms 5720 KB Output is correct
37 Correct 4 ms 5720 KB Output is correct
38 Correct 4 ms 5744 KB Output is correct
39 Correct 14 ms 6232 KB Output is correct
40 Correct 23 ms 6288 KB Output is correct
41 Correct 15 ms 6488 KB Output is correct
42 Correct 20 ms 5972 KB Output is correct
43 Correct 12 ms 5976 KB Output is correct
44 Correct 8 ms 5720 KB Output is correct
45 Correct 9 ms 5720 KB Output is correct
46 Correct 3 ms 5720 KB Output is correct
47 Correct 12 ms 5976 KB Output is correct
48 Correct 20 ms 5968 KB Output is correct
49 Correct 4 ms 5720 KB Output is correct
50 Correct 24 ms 6248 KB Output is correct
51 Correct 14 ms 6476 KB Output is correct
52 Correct 3 ms 5720 KB Output is correct
53 Correct 7 ms 5720 KB Output is correct
54 Correct 11 ms 5936 KB Output is correct
55 Correct 3 ms 5720 KB Output is correct
56 Correct 28 ms 6084 KB Output is correct
57 Correct 19 ms 6104 KB Output is correct
58 Correct 13 ms 5968 KB Output is correct
59 Correct 16 ms 5976 KB Output is correct
60 Correct 18 ms 6076 KB Output is correct
61 Correct 10 ms 5720 KB Output is correct
62 Correct 4 ms 5720 KB Output is correct
63 Correct 12 ms 5976 KB Output is correct
64 Correct 4 ms 5716 KB Output is correct
65 Correct 7 ms 5720 KB Output is correct
66 Correct 7 ms 5720 KB Output is correct
67 Correct 8 ms 5720 KB Output is correct
68 Correct 3 ms 5720 KB Output is correct
69 Correct 7 ms 5976 KB Output is correct
70 Correct 7 ms 5756 KB Output is correct
71 Partially correct 20 ms 5968 KB Partially correct - number of queries: 5030
72 Correct 8 ms 5720 KB Output is correct
73 Correct 20 ms 6268 KB Output is correct
74 Correct 19 ms 5976 KB Output is correct
75 Correct 6 ms 5720 KB Output is correct
76 Correct 26 ms 6056 KB Output is correct
77 Correct 20 ms 5972 KB Output is correct
78 Correct 9 ms 5720 KB Output is correct
79 Correct 11 ms 5976 KB Output is correct
80 Correct 31 ms 6224 KB Output is correct
81 Correct 28 ms 6096 KB Output is correct
82 Correct 14 ms 5976 KB Output is correct
83 Correct 6 ms 5720 KB Output is correct
84 Correct 13 ms 5976 KB Output is correct
85 Correct 20 ms 5976 KB Output is correct
86 Correct 7 ms 5720 KB Output is correct
87 Correct 12 ms 6256 KB Output is correct
88 Correct 7 ms 5720 KB Output is correct
89 Correct 7 ms 5792 KB Output is correct
90 Correct 8 ms 5720 KB Output is correct
91 Correct 6 ms 5748 KB Output is correct
92 Correct 8 ms 5720 KB Output is correct
93 Correct 10 ms 5720 KB Output is correct
94 Correct 6 ms 5720 KB Output is correct
95 Correct 9 ms 5824 KB Output is correct
96 Correct 8 ms 5976 KB Output is correct
97 Correct 5 ms 5792 KB Output is correct