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Submission #112247

# Submission time Handle Problem Language Result Execution time Memory
112247 2019-05-18T07:02:05 Z someone_aa The Big Prize (IOI17_prize) C++17
90 / 100
 98 ms 2148 KB 
#include "prize.h"
#include <bits/stdc++.h>
#define P pair<int,int>
using namespace std;
const int maxn = 200100;
bool visited[maxn];
int q[maxn][2];
int max_sum, ind;
P query(int i) {
    if(visited[i]) return {q[i][0], q[i][1]};
    visited[i] = true;
    vector<int>curr = ask(i);
    q[i][0] = curr[0];
    q[i][1] = curr[1];
    return {q[i][0], q[i][1]};
}

int sum(int i) {
    query(i);
    return q[i][0] + q[i][1];
}

void solve(int l, int r) {
    //cout<<l<<" "<<r<<"\n";
    if(l > r || ind != -1) return;

    P ql = query(l);
    P qr = query(r);

    if(ql.first + ql.second == 0) {
        ind = l;
        return;
    }

    if(qr.first + qr.second == 0) {
        ind = r;
        return;
    }

    if(ql.first + ql.second != max_sum) {
        solve(l+1, r);
        return;
    }

    if(qr.first + qr.second != max_sum) {
        solve(l, r-1);
        return;
    }

    int between  = qr.first - ql.first;
    if(between == 0) return;

    int mid = (l + r) / 2;

    solve(l, mid);
    solve(mid+1, r);
}

int find_best(int n) {
    ind = -1;
    for(int i=0;i<min(n, 500);i++) {
        if(sum(i) == 0) return i;
        max_sum = max(max_sum, sum(i));
    } //max_sum = 1;

    solve(0, n-1);
    return ind;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 392 KB Output is correct
2 Correct 8 ms 388 KB Output is correct
3 Correct 6 ms 376 KB Output is correct
4 Correct 4 ms 396 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 6 ms 256 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 10 ms 384 KB Output is correct
10 Correct 2 ms 428 KB Output is correct

Subtask #2
70.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 4 ms 448 KB Output is correct
3 Correct 3 ms 392 KB Output is correct
4 Correct 4 ms 256 KB Output is correct
5 Correct 6 ms 504 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 4 ms 392 KB Output is correct
8 Correct 3 ms 400 KB Output is correct
9 Correct 6 ms 328 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 12 ms 760 KB Output is correct
12 Correct 7 ms 376 KB Output is correct
13 Correct 7 ms 1120 KB Output is correct
14 Correct 10 ms 376 KB Output is correct
15 Correct 32 ms 504 KB Output is correct
16 Partially correct 70 ms 1792 KB Partially correct - number of queries: 6682
17 Correct 21 ms 408 KB Output is correct
18 Partially correct 40 ms 2080 KB Partially correct - number of queries: 8002
19 Correct 3 ms 524 KB Output is correct
20 Correct 16 ms 652 KB Output is correct
21 Correct 33 ms 888 KB Output is correct
22 Correct 9 ms 456 KB Output is correct
23 Correct 6 ms 384 KB Output is correct
24 Correct 6 ms 384 KB Output is correct
25 Correct 26 ms 1204 KB Output is correct
26 Correct 31 ms 1260 KB Output is correct
27 Correct 7 ms 404 KB Output is correct
28 Partially correct 41 ms 1784 KB Partially correct - number of queries: 6933
29 Partially correct 20 ms 1704 KB Partially correct - number of queries: 5438
30 Partially correct 68 ms 2080 KB Partially correct - number of queries: 7955
31 Correct 3 ms 384 KB Output is correct
32 Correct 13 ms 828 KB Output is correct
33 Correct 2 ms 256 KB Output is correct
34 Correct 14 ms 864 KB Output is correct
35 Correct 10 ms 552 KB Output is correct
36 Correct 14 ms 716 KB Output is correct
37 Correct 7 ms 376 KB Output is correct
38 Correct 5 ms 396 KB Output is correct
39 Correct 22 ms 1016 KB Output is correct
40 Partially correct 64 ms 1984 KB Partially correct - number of queries: 6998
41 Correct 47 ms 1276 KB Output is correct
42 Correct 47 ms 1272 KB Output is correct
43 Correct 44 ms 1272 KB Output is correct
44 Correct 26 ms 916 KB Output is correct
45 Correct 11 ms 892 KB Output is correct
46 Correct 3 ms 544 KB Output is correct
47 Correct 37 ms 1024 KB Output is correct
48 Partially correct 41 ms 1656 KB Partially correct - number of queries: 5826
49 Correct 6 ms 484 KB Output is correct
50 Partially correct 75 ms 1960 KB Partially correct - number of queries: 7960
51 Correct 20 ms 1024 KB Output is correct
52 Correct 8 ms 304 KB Output is correct
53 Correct 12 ms 632 KB Output is correct
54 Correct 14 ms 1116 KB Output is correct
55 Correct 6 ms 256 KB Output is correct
56 Partially correct 50 ms 2040 KB Partially correct - number of queries: 8048
57 Partially correct 38 ms 1528 KB Partially correct - number of queries: 5799
58 Partially correct 53 ms 1592 KB Partially correct - number of queries: 5858
59 Correct 24 ms 1368 KB Output is correct
60 Correct 46 ms 1236 KB Output is correct
61 Correct 9 ms 532 KB Output is correct
62 Correct 5 ms 376 KB Output is correct
63 Correct 6 ms 632 KB Output is correct
64 Correct 7 ms 428 KB Output is correct
65 Correct 6 ms 256 KB Output is correct
66 Correct 6 ms 256 KB Output is correct
67 Correct 7 ms 256 KB Output is correct
68 Correct 3 ms 524 KB Output is correct
69 Correct 4 ms 312 KB Output is correct
70 Correct 6 ms 256 KB Output is correct
71 Partially correct 67 ms 1972 KB Partially correct - number of queries: 8601
72 Correct 9 ms 1016 KB Output is correct
73 Partially correct 98 ms 2040 KB Partially correct - number of queries: 8496
74 Partially correct 62 ms 1972 KB Partially correct - number of queries: 8541
75 Correct 4 ms 692 KB Output is correct
76 Partially correct 34 ms 2040 KB Partially correct - number of queries: 7521
77 Partially correct 58 ms 2060 KB Partially correct - number of queries: 7787
78 Correct 12 ms 1016 KB Output is correct
79 Correct 32 ms 1948 KB Output is correct
80 Partially correct 75 ms 2136 KB Partially correct - number of queries: 7853
81 Partially correct 33 ms 2148 KB Partially correct - number of queries: 7749
82 Partially correct 61 ms 1960 KB Partially correct - number of queries: 7773
83 Correct 10 ms 632 KB Output is correct
84 Partially correct 39 ms 2040 KB Partially correct - number of queries: 6361
85 Partially correct 82 ms 1984 KB Partially correct - number of queries: 7690
86 Correct 7 ms 384 KB Output is correct
87 Correct 3 ms 396 KB Output is correct
88 Correct 7 ms 384 KB Output is correct
89 Correct 5 ms 384 KB Output is correct
90 Correct 5 ms 384 KB Output is correct
91 Correct 3 ms 412 KB Output is correct
92 Correct 5 ms 384 KB Output is correct
93 Correct 14 ms 760 KB Output is correct
94 Correct 11 ms 1016 KB Output is correct
95 Correct 6 ms 904 KB Output is correct
96 Correct 11 ms 896 KB Output is correct
97 Correct 5 ms 384 KB Output is correct