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Submission #1008127

# Submission time Handle Problem Language Result Execution time Memory
1008127 2024-06-26T07:52:28 Z bachhoangxuan The Big Prize (IOI17_prize) C++17
96.13 / 100
 35 ms 6604 KB 
#include "prize.h"
#include<bits/stdc++.h>
using namespace std;
 
const int B = 300;
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 4 ms 5720 KB Output is correct
2 Correct 6 ms 5716 KB Output is correct
3 Correct 6 ms 5976 KB Output is correct
4 Correct 9 ms 5720 KB Output is correct
5 Correct 4 ms 5720 KB Output is correct
6 Correct 1 ms 5720 KB Output is correct
7 Correct 6 ms 5720 KB Output is correct
8 Correct 5 ms 5720 KB Output is correct
9 Correct 5 ms 5720 KB Output is correct
10 Correct 7 ms 5980 KB Output is correct

Subtask #2
76.13 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5720 KB Output is correct
2 Correct 5 ms 5720 KB Output is correct
3 Correct 6 ms 5720 KB Output is correct
4 Correct 6 ms 5720 KB Output is correct
5 Correct 7 ms 5720 KB Output is correct
6 Correct 1 ms 5716 KB Output is correct
7 Correct 3 ms 5720 KB Output is correct
8 Correct 6 ms 5720 KB Output is correct
9 Correct 6 ms 5720 KB Output is correct
10 Correct 6 ms 5720 KB Output is correct
11 Correct 6 ms 5976 KB Output is correct
12 Correct 4 ms 5720 KB Output is correct
13 Correct 6 ms 5720 KB Output is correct
14 Correct 7 ms 5788 KB Output is correct
15 Correct 6 ms 5720 KB Output is correct
16 Correct 30 ms 6236 KB Output is correct
17 Correct 3 ms 5976 KB Output is correct
18 Correct 26 ms 6500 KB Output is correct
19 Correct 5 ms 5720 KB Output is correct
20 Correct 11 ms 5864 KB Output is correct
21 Correct 11 ms 5976 KB Output is correct
22 Correct 5 ms 5720 KB Output is correct
23 Correct 4 ms 5992 KB Output is correct
24 Correct 4 ms 5720 KB Output is correct
25 Correct 18 ms 6232 KB Output is correct
26 Correct 11 ms 5960 KB Output is correct
27 Correct 3 ms 5720 KB Output is correct
28 Correct 17 ms 5976 KB Output is correct
29 Correct 21 ms 6120 KB Output is correct
30 Correct 32 ms 6224 KB Output is correct
31 Correct 3 ms 5720 KB Output is correct
32 Correct 6 ms 5720 KB Output is correct
33 Correct 1 ms 5972 KB Output is correct
34 Correct 8 ms 5976 KB Output is correct
35 Correct 6 ms 5720 KB Output is correct
36 Correct 6 ms 5976 KB Output is correct
37 Correct 4 ms 5720 KB Output is correct
38 Correct 4 ms 5720 KB Output is correct
39 Correct 13 ms 6048 KB Output is correct
40 Correct 19 ms 6036 KB Output is correct
41 Correct 14 ms 5972 KB Output is correct
42 Correct 14 ms 5976 KB Output is correct
43 Correct 16 ms 5820 KB Output is correct
44 Correct 10 ms 6060 KB Output is correct
45 Correct 10 ms 5976 KB Output is correct
46 Correct 3 ms 5720 KB Output is correct
47 Correct 9 ms 5972 KB Output is correct
48 Correct 19 ms 6292 KB Output is correct
49 Correct 7 ms 5976 KB Output is correct
50 Correct 24 ms 6244 KB Output is correct
51 Correct 16 ms 5976 KB Output is correct
52 Correct 3 ms 5720 KB Output is correct
53 Correct 7 ms 5720 KB Output is correct
54 Correct 14 ms 6376 KB Output is correct
55 Correct 5 ms 5720 KB Output is correct
56 Correct 21 ms 5968 KB Output is correct
57 Correct 20 ms 6052 KB Output is correct
58 Correct 17 ms 6000 KB Output is correct
59 Correct 17 ms 5956 KB Output is correct
60 Correct 13 ms 5976 KB Output is correct
61 Correct 8 ms 5720 KB Output is correct
62 Correct 4 ms 5716 KB Output is correct
63 Correct 7 ms 5720 KB Output is correct
64 Correct 6 ms 5720 KB Output is correct
65 Correct 10 ms 5720 KB Output is correct
66 Correct 10 ms 5976 KB Output is correct
67 Correct 8 ms 5720 KB Output is correct
68 Correct 3 ms 5972 KB Output is correct
69 Correct 10 ms 6020 KB Output is correct
70 Correct 7 ms 5976 KB Output is correct
71 Partially correct 23 ms 6276 KB Partially correct - number of queries: 5387
72 Correct 9 ms 5776 KB Output is correct
73 Partially correct 35 ms 6272 KB Partially correct - number of queries: 5324
74 Partially correct 29 ms 6004 KB Partially correct - number of queries: 5351
75 Correct 9 ms 6024 KB Output is correct
76 Correct 27 ms 6236 KB Output is correct
77 Correct 33 ms 6248 KB Output is correct
78 Correct 5 ms 5720 KB Output is correct
79 Correct 13 ms 5804 KB Output is correct
80 Correct 19 ms 6288 KB Output is correct
81 Correct 22 ms 5904 KB Output is correct
82 Correct 23 ms 5976 KB Output is correct
83 Correct 7 ms 5976 KB Output is correct
84 Correct 16 ms 6604 KB Output is correct
85 Correct 28 ms 5996 KB Output is correct
86 Correct 6 ms 5720 KB Output is correct
87 Correct 8 ms 5720 KB Output is correct
88 Correct 5 ms 5720 KB Output is correct
89 Correct 6 ms 5720 KB Output is correct
90 Correct 6 ms 5744 KB Output is correct
91 Correct 6 ms 5720 KB Output is correct
92 Correct 7 ms 5976 KB Output is correct
93 Correct 11 ms 5720 KB Output is correct
94 Correct 8 ms 5976 KB Output is correct
95 Correct 7 ms 5720 KB Output is correct
96 Correct 9 ms 5824 KB Output is correct
97 Correct 6 ms 5720 KB Output is correct