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Submission #1057287

# Submission time Handle Problem Language Result Execution time Memory
1057287 2024-08-13T16:31:16 Z shenfe1 The Big Prize (IOI17_prize) C++17
20 / 100
 27 ms 2392 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];

pii cnt(int pos){
    if(use[pos])return res[pos];
    use[pos]=1;
    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=450;
    for(int i=0;i<min(n,L);i++){
        int j=rng()%n;
        cntMx=max(cntMx,sum(j));
        if(sum(j)==0)return j;
        if(sum(j)>n/2)break;
    }
    queue<pair<pii,pii>>  q;
    q.push({{0,n-1},{cntMx,0}});
    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();
        if(c==0)continue;
        if(c==r-l+1){
            for(int i=l;i<=r;i++){
                if(sum(i)==0)return i;
            }
            continue;
        }
        int tl=(l+r)/2,tr=(l+r)/2;
        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++;
        }
        int L=cnt(tl).F-pl;
        int R=c-L-max(0,tr-tl-1);
        // if(L+R!=c){
        //     cout<<l<<" "<<r<<" "<<L<<" "<<R<<"\n";
        // }
        if(l<=tl-1)q.push({{l,tl-1},{L,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 1620 KB Output is correct
2 Correct 3 ms 1624 KB Output is correct
3 Correct 3 ms 1624 KB Output is correct
4 Correct 3 ms 1880 KB Output is correct
5 Correct 2 ms 1624 KB Output is correct
6 Correct 2 ms 1716 KB Output is correct
7 Correct 2 ms 1628 KB Output is correct
8 Correct 3 ms 1624 KB Output is correct
9 Correct 4 ms 1624 KB Output is correct
10 Correct 3 ms 1624 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1624 KB Output is correct
2 Correct 3 ms 1496 KB Output is correct
3 Correct 3 ms 1620 KB Output is correct
4 Correct 3 ms 1684 KB Output is correct
5 Correct 2 ms 1624 KB Output is correct
6 Correct 2 ms 1624 KB Output is correct
7 Correct 2 ms 1624 KB Output is correct
8 Correct 3 ms 1624 KB Output is correct
9 Correct 2 ms 1892 KB Output is correct
10 Correct 2 ms 1624 KB Output is correct
11 Correct 4 ms 1756 KB Output is correct
12 Correct 5 ms 1880 KB Output is correct
13 Correct 6 ms 1720 KB Output is correct
14 Correct 7 ms 600 KB Output is correct
15 Correct 17 ms 2248 KB Output is correct
16 Correct 17 ms 2136 KB Output is correct
17 Correct 21 ms 2136 KB Output is correct
18 Correct 20 ms 2136 KB Output is correct
19 Correct 13 ms 2200 KB Output is correct
20 Correct 16 ms 1812 KB Output is correct
21 Correct 12 ms 2136 KB Output is correct
22 Correct 14 ms 2136 KB Output is correct
23 Correct 3 ms 1624 KB Output is correct
24 Correct 5 ms 1880 KB Output is correct
25 Correct 16 ms 2136 KB Output is correct
26 Correct 17 ms 2136 KB Output is correct
27 Correct 4 ms 1624 KB Output is correct
28 Correct 10 ms 2148 KB Output is correct
29 Correct 22 ms 2136 KB Output is correct
30 Correct 21 ms 2212 KB Output is correct
31 Correct 13 ms 2136 KB Output is correct
32 Correct 4 ms 1880 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 12 ms 2176 KB Output is correct
35 Correct 3 ms 1624 KB Output is correct
36 Correct 19 ms 2136 KB Output is correct
37 Correct 5 ms 1624 KB Output is correct
38 Correct 3 ms 1624 KB Output is correct
39 Correct 16 ms 2136 KB Output is correct
40 Correct 19 ms 2392 KB Output is correct
41 Correct 15 ms 2136 KB Output is correct
42 Correct 16 ms 2136 KB Output is correct
43 Correct 24 ms 2388 KB Output is correct
44 Correct 23 ms 2136 KB Output is correct
45 Correct 18 ms 2136 KB Output is correct
46 Correct 27 ms 2136 KB Output is correct
47 Correct 16 ms 2136 KB Output is correct
48 Correct 21 ms 2136 KB Output is correct
49 Correct 10 ms 2136 KB Output is correct
50 Correct 20 ms 2136 KB Output is correct
51 Correct 20 ms 2356 KB Output is correct
52 Correct 21 ms 2136 KB Output is correct
53 Correct 4 ms 1624 KB Output is correct
54 Correct 11 ms 2136 KB Output is correct
55 Correct 21 ms 2136 KB Output is correct
56 Partially correct 20 ms 2136 KB Partially correct - number of queries: 5079
57 Correct 22 ms 2392 KB Output is correct
58 Partially correct 26 ms 2392 KB Partially correct - number of queries: 5013
59 Correct 21 ms 2136 KB Output is correct
60 Correct 16 ms 2136 KB Output is correct
61 Correct 3 ms 1624 KB Output is correct
62 Correct 3 ms 1716 KB Output is correct
63 Correct 3 ms 1624 KB Output is correct
64 Correct 2 ms 1624 KB Output is correct
65 Incorrect 2 ms 1624 KB Integer -1 violates the range [0, 199999]
66 Halted 0 ms 0 KB -