oj.uz

Submission #1057352

# Submission time Handle Problem Language Result Execution time Memory
1057352 2024-08-13T17:49:35 Z shenfe1 The Big Prize (IOI17_prize) C++17
100 / 100
 32 ms 2464 KB 
#include <bits/stdc++.h>
#include "prize.h"
    
using namespace std;
    
#define pb push_back
#define pii pair<int,int>
#define sz(s) (int)s.size()
#define F first
#define S second
#define all(v) v.begin(),v.end()
    
const int MAX=2e5+10;
    
bool use[MAX];
pii res[MAX];
int cq;
    
pii cnt(int pos){
    if(use[pos])return res[pos];
    use[pos]=1;
    cq++;
    vector<int> v=ask(pos);
    return res[pos]={v[0],v[1]};
}
    
int sum(int pos){
    pii c=cnt(pos);
    return c.F+c.S;
}
    
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
    
int rnd(int l,int r){
    return rng()%(r-l+1)+l;
}
    
int cntMx;
    
int find_best(int n){
    cntMx=0;
    int L=500;
    int r=0;
    // cout<<r<<"\n";
    for(int j=0;j<min(n,L);j++){
        cntMx=max(cntMx,sum(j));
        r++;
        if(sum(j)==0)return j;
        if(cntMx*cntMx+1>n){
            // cout<<j<<'\n';
            break;
        }
    }
    // cout<<r<<" "<<cq<<"\n";
    int pref=0;
    for(int j=0;j<r;j++){
        if(sum(j)!=cntMx)pref++;
    }
    queue<pair<pii,pii>>  q;
    q.push({{r,n-1},{cntMx,pref}});
    while(!q.empty()){
        int l=q.front().F.F,r=q.front().F.S,c=q.front().S.F,pl=q.front().S.S;
        q.pop();
        // cout<<cq<<"\n";
        if(c==0)continue;
        if(c==r-l+1){
            // cout<<"??\n";
            for(int i=l;i<=r;i++){
                if(sum(i)==0){
                    return i;
                }
            }
            continue;
        }
        // cout<<l<<" "<<r<<" "<<c<<" "<<pl<<"\n";
        int tl=(l+r)/2,tr=(l+r)/2;
        // cout<<sum(tl)<<" "<<cntMx<<"\n";
        while(tl>=l&&sum(tl)!=cntMx){
            if(sum(tl)==0){
                return tl;
            }
            tl--;
        }
        while(tr<=r&&sum(tr)!=cntMx){
            if(sum(tr)==0){
                return tr;
            }
            tr++;
        }
        // cerr<<tl<<" "<<tr<<"\n";
        if(tl>=l){
            int L=cnt(tl).F-pl;
            if(l<=tl-1)q.push({{l,tl-1},{L,pl}});
        }
        if(tr<=r){
            int R=c-cnt(tr).F+pl;
            if(tr+1<=r){
                q.push({{tr+1,r},{R,cnt(tr).F}});
            }
        }
    }
    return -1;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 344 KB Output is correct
2 Correct 2 ms 344 KB Output is correct
3 Correct 2 ms 344 KB Output is correct
4 Correct 2 ms 344 KB Output is correct
5 Correct 2 ms 440 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 2 ms 344 KB Output is correct
8 Correct 3 ms 344 KB Output is correct
9 Correct 3 ms 344 KB Output is correct
10 Correct 3 ms 600 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 2 ms 600 KB Output is correct
3 Correct 3 ms 344 KB Output is correct
4 Correct 3 ms 344 KB Output is correct
5 Correct 2 ms 456 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 2 ms 344 KB Output is correct
8 Correct 3 ms 344 KB Output is correct
9 Correct 3 ms 436 KB Output is correct
10 Correct 2 ms 344 KB Output is correct
11 Correct 3 ms 1112 KB Output is correct
12 Correct 4 ms 1112 KB Output is correct
13 Correct 4 ms 1112 KB Output is correct
14 Correct 5 ms 456 KB Output is correct
15 Correct 13 ms 2136 KB Output is correct
16 Correct 16 ms 2136 KB Output is correct
17 Correct 15 ms 2136 KB Output is correct
18 Correct 11 ms 2216 KB Output is correct
19 Correct 2 ms 344 KB Output is correct
20 Correct 9 ms 1112 KB Output is correct
21 Correct 22 ms 2136 KB Output is correct
22 Correct 21 ms 2136 KB Output is correct
23 Correct 4 ms 656 KB Output is correct
24 Correct 3 ms 856 KB Output is correct
25 Correct 11 ms 2136 KB Output is correct
26 Correct 16 ms 1880 KB Output is correct
27 Correct 3 ms 600 KB Output is correct
28 Correct 11 ms 1880 KB Output is correct
29 Correct 20 ms 1880 KB Output is correct
30 Correct 13 ms 2136 KB Output is correct
31 Correct 16 ms 2392 KB Output is correct
32 Correct 4 ms 1112 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 23 ms 2464 KB Output is correct
35 Correct 4 ms 712 KB Output is correct
36 Correct 16 ms 1976 KB Output is correct
37 Correct 5 ms 1112 KB Output is correct
38 Correct 2 ms 600 KB Output is correct
39 Correct 16 ms 2176 KB Output is correct
40 Correct 20 ms 2128 KB Output is correct
41 Correct 11 ms 2132 KB Output is correct
42 Correct 10 ms 2136 KB Output is correct
43 Correct 17 ms 2136 KB Output is correct
44 Correct 11 ms 2136 KB Output is correct
45 Correct 9 ms 1880 KB Output is correct
46 Correct 16 ms 2136 KB Output is correct
47 Correct 17 ms 1880 KB Output is correct
48 Correct 13 ms 2136 KB Output is correct
49 Correct 25 ms 2136 KB Output is correct
50 Correct 21 ms 2136 KB Output is correct
51 Correct 17 ms 2136 KB Output is correct
52 Correct 24 ms 2392 KB Output is correct
53 Correct 3 ms 596 KB Output is correct
54 Correct 14 ms 2136 KB Output is correct
55 Correct 15 ms 2136 KB Output is correct
56 Correct 17 ms 2136 KB Output is correct
57 Correct 18 ms 2136 KB Output is correct
58 Correct 17 ms 2136 KB Output is correct
59 Correct 22 ms 2136 KB Output is correct
60 Correct 10 ms 2136 KB Output is correct
61 Correct 3 ms 596 KB Output is correct
62 Correct 2 ms 600 KB Output is correct
63 Correct 3 ms 600 KB Output is correct
64 Correct 2 ms 856 KB Output is correct
65 Correct 3 ms 344 KB Output is correct
66 Correct 3 ms 344 KB Output is correct
67 Correct 1 ms 344 KB Output is correct
68 Correct 2 ms 440 KB Output is correct
69 Correct 2 ms 344 KB Output is correct
70 Correct 3 ms 344 KB Output is correct
71 Correct 16 ms 2136 KB Output is correct
72 Correct 4 ms 1112 KB Output is correct
73 Correct 16 ms 2136 KB Output is correct
74 Correct 23 ms 2132 KB Output is correct
75 Correct 2 ms 600 KB Output is correct
76 Correct 16 ms 2136 KB Output is correct
77 Correct 18 ms 2216 KB Output is correct
78 Correct 4 ms 1112 KB Output is correct
79 Correct 12 ms 2136 KB Output is correct
80 Correct 32 ms 2136 KB Output is correct
81 Correct 17 ms 2136 KB Output is correct
82 Correct 13 ms 2136 KB Output is correct
83 Correct 3 ms 600 KB Output is correct
84 Correct 16 ms 2136 KB Output is correct
85 Correct 21 ms 2392 KB Output is correct
86 Correct 2 ms 344 KB Output is correct
87 Correct 2 ms 344 KB Output is correct
88 Correct 2 ms 344 KB Output is correct
89 Correct 2 ms 344 KB Output is correct
90 Correct 2 ms 344 KB Output is correct
91 Correct 2 ms 344 KB Output is correct
92 Correct 2 ms 344 KB Output is correct
93 Correct 4 ms 856 KB Output is correct
94 Correct 4 ms 856 KB Output is correct
95 Correct 4 ms 968 KB Output is correct
96 Correct 2 ms 856 KB Output is correct
97 Correct 2 ms 344 KB Output is correct