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Submission #1031003

# Submission time Handle Problem Language Result Execution time Memory
1031003 2024-07-22T13:25:01 Z coolboy19521 The Big Prize (IOI17_prize) C++17
100 / 100
 40 ms 5764 KB 
#include "prize.h"
#include "iostream"
 
using namespace std;

const int sz = 2e5 + 10;

vector<int> bf[sz];

vector<int> Ask(int x) {
    if (bf[x].size()) return bf[x];
    return bf[x] = ask(x);
}
 
int find_best(int n) {
    int mx = 0, xx = 600;
    for (int i = 0; i < min(n, 600); i ++) {
        auto pr = Ask(i);
        mx = max(mx, pr[0] + pr[1]);
        if (0 == pr[0] + pr[1]) return i;
        if (30 < mx) {
            xx = i + 1;
            break;
        }
    }
    int ls = xx;
    while (ls < n) {
        int ps;
        for (; ls < n; ls ++) {
            auto pr = Ask(ls);
            int sm = pr[0] + pr[1];
            if (0 == sm) return ls;
            if (sm == mx) {
                ps = pr[1];
                break;
            }
        }
        int ds = xx;
        int rs = n;
        while (1 < rs - ds) {
            int mi = (ds + rs + 1) / 2;
            if (mi <= ls) {
                ds = mi;
                continue;
            }
            auto pr = Ask(mi);
            int sm = pr[0] + pr[1];
            if (0 == sm) return mi;
            if (sm != mx) rs = mi;
            if (0 == ps - pr[1]) ds = mi;
            else rs = mi;
        }
        ls = ds + 1;
    }
    return 0;
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:50:13: warning: 'ps' may be used uninitialized in this function [-Wmaybe-uninitialized]
   50 |             if (0 == ps - pr[1]) ds = mi;
      |             ^~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4952 KB Output is correct
2 Correct 4 ms 4952 KB Output is correct
3 Correct 4 ms 4952 KB Output is correct
4 Correct 4 ms 4952 KB Output is correct
5 Correct 4 ms 4952 KB Output is correct
6 Correct 2 ms 4952 KB Output is correct
7 Correct 4 ms 4952 KB Output is correct
8 Correct 4 ms 4952 KB Output is correct
9 Correct 3 ms 4952 KB Output is correct
10 Correct 3 ms 4952 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 4952 KB Output is correct
2 Correct 4 ms 5152 KB Output is correct
3 Correct 4 ms 4952 KB Output is correct
4 Correct 4 ms 4952 KB Output is correct
5 Correct 4 ms 5208 KB Output is correct
6 Correct 1 ms 4952 KB Output is correct
7 Correct 4 ms 4952 KB Output is correct
8 Correct 4 ms 4952 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 4952 KB Output is correct
11 Correct 2 ms 4952 KB Output is correct
12 Correct 1 ms 4952 KB Output is correct
13 Correct 4 ms 4952 KB Output is correct
14 Correct 3 ms 4952 KB Output is correct
15 Correct 4 ms 4952 KB Output is correct
16 Correct 16 ms 5216 KB Output is correct
17 Correct 3 ms 4952 KB Output is correct
18 Correct 26 ms 5664 KB Output is correct
19 Correct 2 ms 4952 KB Output is correct
20 Correct 7 ms 4952 KB Output is correct
21 Correct 12 ms 5140 KB Output is correct
22 Correct 3 ms 4952 KB Output is correct
23 Correct 4 ms 4952 KB Output is correct
24 Correct 1 ms 4952 KB Output is correct
25 Correct 11 ms 5160 KB Output is correct
26 Correct 7 ms 4952 KB Output is correct
27 Correct 3 ms 4952 KB Output is correct
28 Correct 24 ms 5208 KB Output is correct
29 Correct 19 ms 5208 KB Output is correct
30 Correct 21 ms 5208 KB Output is correct
31 Correct 3 ms 4952 KB Output is correct
32 Correct 3 ms 5644 KB Output is correct
33 Correct 2 ms 4952 KB Output is correct
34 Correct 6 ms 4952 KB Output is correct
35 Correct 6 ms 4952 KB Output is correct
36 Correct 7 ms 5208 KB Output is correct
37 Correct 2 ms 4952 KB Output is correct
38 Correct 5 ms 4952 KB Output is correct
39 Correct 9 ms 4952 KB Output is correct
40 Correct 19 ms 5236 KB Output is correct
41 Correct 18 ms 5208 KB Output is correct
42 Correct 12 ms 5184 KB Output is correct
43 Correct 18 ms 5184 KB Output is correct
44 Correct 8 ms 4952 KB Output is correct
45 Correct 5 ms 4952 KB Output is correct
46 Correct 2 ms 4952 KB Output is correct
47 Correct 10 ms 4952 KB Output is correct
48 Correct 18 ms 5460 KB Output is correct
49 Correct 2 ms 4952 KB Output is correct
50 Correct 27 ms 5208 KB Output is correct
51 Correct 9 ms 4952 KB Output is correct
52 Correct 2 ms 4952 KB Output is correct
53 Correct 7 ms 4952 KB Output is correct
54 Correct 9 ms 5176 KB Output is correct
55 Correct 1 ms 4952 KB Output is correct
56 Correct 17 ms 5276 KB Output is correct
57 Correct 10 ms 5208 KB Output is correct
58 Correct 15 ms 5208 KB Output is correct
59 Correct 11 ms 4952 KB Output is correct
60 Correct 15 ms 5156 KB Output is correct
61 Correct 7 ms 4952 KB Output is correct
62 Correct 5 ms 4952 KB Output is correct
63 Correct 4 ms 4952 KB Output is correct
64 Correct 8 ms 4952 KB Output is correct
65 Correct 2 ms 4952 KB Output is correct
66 Correct 3 ms 5124 KB Output is correct
67 Correct 1 ms 4952 KB Output is correct
68 Correct 3 ms 4952 KB Output is correct
69 Correct 3 ms 4952 KB Output is correct
70 Correct 2 ms 4952 KB Output is correct
71 Correct 19 ms 5200 KB Output is correct
72 Correct 5 ms 4952 KB Output is correct
73 Correct 22 ms 5176 KB Output is correct
74 Correct 20 ms 5196 KB Output is correct
75 Correct 5 ms 4952 KB Output is correct
76 Correct 19 ms 5200 KB Output is correct
77 Correct 23 ms 5424 KB Output is correct
78 Correct 4 ms 4952 KB Output is correct
79 Correct 16 ms 4952 KB Output is correct
80 Correct 32 ms 5200 KB Output is correct
81 Correct 25 ms 5208 KB Output is correct
82 Correct 26 ms 5764 KB Output is correct
83 Correct 7 ms 5208 KB Output is correct
84 Correct 21 ms 5204 KB Output is correct
85 Correct 40 ms 5652 KB Output is correct
86 Correct 4 ms 4952 KB Output is correct
87 Correct 2 ms 4952 KB Output is correct
88 Correct 4 ms 5208 KB Output is correct
89 Correct 4 ms 4952 KB Output is correct
90 Correct 5 ms 4952 KB Output is correct
91 Correct 3 ms 4952 KB Output is correct
92 Correct 4 ms 4952 KB Output is correct
93 Correct 5 ms 4952 KB Output is correct
94 Correct 6 ms 4952 KB Output is correct
95 Correct 5 ms 4952 KB Output is correct
96 Correct 5 ms 4952 KB Output is correct
97 Correct 3 ms 5208 KB Output is correct