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Submission #136139

# Submission time Handle Problem Language Result Execution time Memory
136139 2019-07-24T18:48:31 Z alexandra_udristoiu The Big Prize (IOI17_prize) C++14
100 / 100
 61 ms 5308 KB 
#include<iostream>
#include<vector>
#include<cmath>
#include "prize.h"
using namespace std;
static int nr, x;
static vector<int> an[200005];
vector<int> ask2(int p){
    if(an[p].size() == 0){
        an[p] = ask(p);
    }
    return an[p];
}
void solve(int p, int u, int nrp, int nru){
    if(p >= u || nrp + nru == nr){
        return;
    }
    vector<int> a;
    int mid, m;
    mid = (p + u) / 2;
    m = mid + 1;
    while(m <= u){
        a = ask2(m);
        if(a[0] + a[1] == 0){
            x = m;
            return;
        }
        if(a[0] + a[1] == nr){
            break;
        }
        m++;
    }
    if(m <= u){
        solve(p, mid, nrp, a[1] + m - mid - 1);
        solve(m, u, a[0], nru);
    }
    else{
        solve(p, mid, nrp, nru + u - mid);
    }
}
int find_best(int n){
    int r, i, p;
    vector<int> a;
    r = sqrt(n * 1.0);
    for(i = 0; i <= r + 100; i++){
        a = ask2(i);
        if(a[0] == 0 && a[1] == 0){
            return i;
        }
        if(nr <= a[1] + a[0]){
            nr = a[1] + a[0];
            p = i;
        }
        if(nr >= 35){
            break;
        }
    }
    a = ask2(p);
    solve(p, n - 1, a[0], 0);
    return x;
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:58:13: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
     a = ask2(p);
         ~~~~^~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 4984 KB Output is correct
2 Correct 12 ms 4984 KB Output is correct
3 Correct 12 ms 4984 KB Output is correct
4 Correct 9 ms 5120 KB Output is correct
5 Correct 11 ms 5112 KB Output is correct
6 Correct 6 ms 4984 KB Output is correct
7 Correct 13 ms 5112 KB Output is correct
8 Correct 12 ms 5020 KB Output is correct
9 Correct 9 ms 5040 KB Output is correct
10 Correct 11 ms 4984 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 5136 KB Output is correct
2 Correct 11 ms 4984 KB Output is correct
3 Correct 13 ms 4984 KB Output is correct
4 Correct 13 ms 4984 KB Output is correct
5 Correct 10 ms 4984 KB Output is correct
6 Correct 6 ms 5112 KB Output is correct
7 Correct 12 ms 4984 KB Output is correct
8 Correct 9 ms 5032 KB Output is correct
9 Correct 12 ms 5000 KB Output is correct
10 Correct 12 ms 4984 KB Output is correct
11 Correct 11 ms 5032 KB Output is correct
12 Correct 15 ms 4984 KB Output is correct
13 Correct 17 ms 4984 KB Output is correct
14 Correct 15 ms 5112 KB Output is correct
15 Correct 43 ms 5232 KB Output is correct
16 Correct 29 ms 5252 KB Output is correct
17 Correct 42 ms 5228 KB Output is correct
18 Correct 45 ms 5108 KB Output is correct
19 Correct 46 ms 5096 KB Output is correct
20 Correct 33 ms 4984 KB Output is correct
21 Correct 46 ms 5256 KB Output is correct
22 Correct 38 ms 5104 KB Output is correct
23 Correct 12 ms 4984 KB Output is correct
24 Correct 14 ms 4984 KB Output is correct
25 Correct 45 ms 5136 KB Output is correct
26 Correct 33 ms 5308 KB Output is correct
27 Correct 13 ms 4984 KB Output is correct
28 Correct 27 ms 5228 KB Output is correct
29 Correct 44 ms 5092 KB Output is correct
30 Correct 29 ms 5144 KB Output is correct
31 Correct 48 ms 5112 KB Output is correct
32 Correct 15 ms 4984 KB Output is correct
33 Correct 6 ms 4984 KB Output is correct
34 Correct 55 ms 5096 KB Output is correct
35 Correct 15 ms 4984 KB Output is correct
36 Correct 45 ms 5112 KB Output is correct
37 Correct 16 ms 4984 KB Output is correct
38 Correct 11 ms 5136 KB Output is correct
39 Correct 43 ms 5244 KB Output is correct
40 Correct 28 ms 5204 KB Output is correct
41 Correct 47 ms 5112 KB Output is correct
42 Correct 45 ms 5256 KB Output is correct
43 Correct 57 ms 5032 KB Output is correct
44 Correct 29 ms 5252 KB Output is correct
45 Correct 27 ms 5124 KB Output is correct
46 Correct 48 ms 5240 KB Output is correct
47 Correct 43 ms 5112 KB Output is correct
48 Correct 54 ms 5100 KB Output is correct
49 Correct 53 ms 5112 KB Output is correct
50 Correct 29 ms 5188 KB Output is correct
51 Correct 48 ms 5048 KB Output is correct
52 Correct 47 ms 5084 KB Output is correct
53 Correct 10 ms 5140 KB Output is correct
54 Correct 44 ms 5112 KB Output is correct
55 Correct 32 ms 5120 KB Output is correct
56 Correct 54 ms 5120 KB Output is correct
57 Correct 59 ms 5120 KB Output is correct
58 Correct 30 ms 5252 KB Output is correct
59 Correct 61 ms 5252 KB Output is correct
60 Correct 51 ms 5112 KB Output is correct
61 Correct 13 ms 5112 KB Output is correct
62 Correct 12 ms 5004 KB Output is correct
63 Correct 15 ms 4988 KB Output is correct
64 Correct 10 ms 5136 KB Output is correct
65 Correct 12 ms 4984 KB Output is correct
66 Correct 11 ms 5112 KB Output is correct
67 Correct 11 ms 4984 KB Output is correct
68 Correct 10 ms 5008 KB Output is correct
69 Correct 10 ms 4984 KB Output is correct
70 Correct 8 ms 5112 KB Output is correct
71 Correct 52 ms 5072 KB Output is correct
72 Correct 17 ms 4984 KB Output is correct
73 Correct 54 ms 5240 KB Output is correct
74 Correct 61 ms 5112 KB Output is correct
75 Correct 12 ms 4984 KB Output is correct
76 Correct 55 ms 5112 KB Output is correct
77 Correct 47 ms 5112 KB Output is correct
78 Correct 18 ms 4984 KB Output is correct
79 Correct 34 ms 5028 KB Output is correct
80 Correct 44 ms 5112 KB Output is correct
81 Correct 45 ms 5140 KB Output is correct
82 Correct 48 ms 5148 KB Output is correct
83 Correct 17 ms 5024 KB Output is correct
84 Correct 54 ms 5040 KB Output is correct
85 Correct 57 ms 5060 KB Output is correct
86 Correct 9 ms 5028 KB Output is correct
87 Correct 12 ms 4984 KB Output is correct
88 Correct 14 ms 4984 KB Output is correct
89 Correct 9 ms 5120 KB Output is correct
90 Correct 13 ms 5024 KB Output is correct
91 Correct 9 ms 4984 KB Output is correct
92 Correct 13 ms 4984 KB Output is correct
93 Correct 13 ms 4984 KB Output is correct
94 Correct 15 ms 5036 KB Output is correct
95 Correct 14 ms 4984 KB Output is correct
96 Correct 15 ms 4984 KB Output is correct
97 Correct 10 ms 5112 KB Output is correct