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Submission #1008109

# Submission time Handle Problem Language Result Execution time Memory
1008109 2024-06-26T07:41:29 Z bachhoangxuan The Big Prize (IOI17_prize) C++17
99.7 / 100
 34 ms 7252 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;
            }
            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 6 ms 5716 KB Output is correct
2 Correct 6 ms 5720 KB Output is correct
3 Correct 9 ms 5976 KB Output is correct
4 Correct 9 ms 5720 KB Output is correct
5 Correct 6 ms 5720 KB Output is correct
6 Correct 1 ms 5720 KB Output is correct
7 Correct 3 ms 5720 KB Output is correct
8 Correct 6 ms 5744 KB Output is correct
9 Correct 8 ms 5972 KB Output is correct
10 Correct 9 ms 5764 KB Output is correct

Subtask #2
79.7 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5720 KB Output is correct
2 Correct 6 ms 5720 KB Output is correct
3 Correct 7 ms 5976 KB Output is correct
4 Correct 9 ms 5976 KB Output is correct
5 Correct 5 ms 5976 KB Output is correct
6 Correct 2 ms 5720 KB Output is correct
7 Correct 6 ms 5720 KB Output is correct
8 Correct 6 ms 5720 KB Output is correct
9 Correct 5 ms 5720 KB Output is correct
10 Correct 9 ms 5752 KB Output is correct
11 Correct 8 ms 5976 KB Output is correct
12 Correct 3 ms 5720 KB Output is correct
13 Correct 11 ms 5716 KB Output is correct
14 Correct 4 ms 5720 KB Output is correct
15 Correct 8 ms 5720 KB Output is correct
16 Correct 19 ms 6056 KB Output is correct
17 Correct 3 ms 5976 KB Output is correct
18 Correct 27 ms 6720 KB Output is correct
19 Correct 4 ms 5720 KB Output is correct
20 Correct 8 ms 5720 KB Output is correct
21 Correct 11 ms 6000 KB Output is correct
22 Correct 6 ms 5720 KB Output is correct
23 Correct 3 ms 5720 KB Output is correct
24 Correct 4 ms 5720 KB Output is correct
25 Correct 16 ms 6180 KB Output is correct
26 Correct 12 ms 5956 KB Output is correct
27 Correct 7 ms 6012 KB Output is correct
28 Correct 28 ms 6020 KB Output is correct
29 Correct 23 ms 6472 KB Output is correct
30 Correct 30 ms 6220 KB Output is correct
31 Correct 5 ms 5720 KB Output is correct
32 Correct 9 ms 6264 KB Output is correct
33 Correct 2 ms 5720 KB Output is correct
34 Correct 13 ms 6620 KB Output is correct
35 Correct 8 ms 5752 KB Output is correct
36 Correct 8 ms 5720 KB Output is correct
37 Correct 6 ms 5972 KB Output is correct
38 Correct 4 ms 5976 KB Output is correct
39 Correct 16 ms 6084 KB Output is correct
40 Correct 23 ms 6248 KB Output is correct
41 Correct 19 ms 6108 KB Output is correct
42 Correct 16 ms 6188 KB Output is correct
43 Correct 16 ms 6488 KB Output is correct
44 Correct 12 ms 5976 KB Output is correct
45 Correct 9 ms 5720 KB Output is correct
46 Correct 6 ms 5720 KB Output is correct
47 Correct 13 ms 5976 KB Output is correct
48 Correct 18 ms 5972 KB Output is correct
49 Correct 5 ms 5720 KB Output is correct
50 Correct 28 ms 6212 KB Output is correct
51 Correct 14 ms 5972 KB Output is correct
52 Correct 4 ms 5720 KB Output is correct
53 Correct 8 ms 5748 KB Output is correct
54 Correct 16 ms 5976 KB Output is correct
55 Correct 4 ms 5720 KB Output is correct
56 Correct 34 ms 7076 KB Output is correct
57 Correct 19 ms 6220 KB Output is correct
58 Correct 21 ms 6000 KB Output is correct
59 Correct 21 ms 6128 KB Output is correct
60 Correct 14 ms 5976 KB Output is correct
61 Correct 8 ms 5972 KB Output is correct
62 Correct 5 ms 5720 KB Output is correct
63 Correct 11 ms 6264 KB Output is correct
64 Correct 8 ms 5720 KB Output is correct
65 Correct 7 ms 5720 KB Output is correct
66 Correct 13 ms 5748 KB Output is correct
67 Correct 12 ms 5772 KB Output is correct
68 Correct 3 ms 6228 KB Output is correct
69 Correct 10 ms 5720 KB Output is correct
70 Correct 10 ms 6004 KB Output is correct
71 Partially correct 26 ms 5976 KB Partially correct - number of queries: 5030
72 Correct 11 ms 5720 KB Output is correct
73 Correct 27 ms 6036 KB Output is correct
74 Correct 27 ms 6232 KB Output is correct
75 Correct 12 ms 5720 KB Output is correct
76 Correct 23 ms 6248 KB Output is correct
77 Correct 32 ms 6772 KB Output is correct
78 Correct 13 ms 5720 KB Output is correct
79 Correct 16 ms 6056 KB Output is correct
80 Correct 28 ms 6260 KB Output is correct
81 Correct 21 ms 6284 KB Output is correct
82 Correct 23 ms 6260 KB Output is correct
83 Correct 9 ms 5976 KB Output is correct
84 Correct 27 ms 7252 KB Output is correct
85 Correct 31 ms 6228 KB Output is correct
86 Correct 7 ms 5792 KB Output is correct
87 Correct 10 ms 5720 KB Output is correct
88 Correct 10 ms 5720 KB Output is correct
89 Correct 8 ms 5972 KB Output is correct
90 Correct 9 ms 5976 KB Output is correct
91 Correct 6 ms 5720 KB Output is correct
92 Correct 10 ms 5976 KB Output is correct
93 Correct 7 ms 5720 KB Output is correct
94 Correct 8 ms 5720 KB Output is correct
95 Correct 8 ms 5976 KB Output is correct
96 Correct 11 ms 5720 KB Output is correct
97 Correct 10 ms 5720 KB Output is correct