Submission #40219

# Submission time Handle Problem Language Result Execution time Memory
40219 2018-01-30T05:21:38 Z jackyliuxx The Big Prize (IOI17_prize) C++14
97.42 / 100
29 ms 2420 KB
#include "prize.h"
#include <map>
#include <iostream>
using namespace std;

map<int, pair<int, int>> resmp;

pair<int, int> myask(int i) {
    if (resmp.find(i) == resmp.end()) {
        auto r = ask(i);
        resmp[i] = {r[0], r[1]};
    }
    return resmp[i];
}
 
int gogo(int fr, int to, int lc, int rc, int mxc) {
    if (lc + rc == mxc) {
        return -1;
    }
    int mid = (fr + to) / 2;
    int lto = mid, rfr = mid + 1;
    int n = to - fr;
    for (int i = 0; i < n; i++) {
        if (i & 1) {
            mid -= i;
        } else {
            mid += i;
        }
        lto = min(lto, mid);
        rfr = max(rfr, mid + 1);
        auto res = myask(mid);
        int c = res.first + res.second;
        if (c == 0) {
            return mid;
        } else if (c == mxc) {
            int lrc, rlc;
            if (mid == lto) {
                lrc = res.second;
                rlc = res.first + i;
            } else {
                lrc = res.second + i;
                rlc = res.first;
            }
            int lrt = gogo(fr, lto, lc, lrc, mxc);
            if (lrt != -1) {
                return lrt;
            } else {
                return gogo(rfr, to, rlc, rc, mxc);
            }
        }
    }
    return -1;
}
 
int find_best(int n) {
    resmp.clear();
    int mxc = 0;
    int lc = 0;
    for(int i = 0; i < n && i < 500; i++) {
		auto res = myask(i);
        lc = res.first;
		if(res.first + res.second == 0)
			return i;
        if (res.first + res.second > mxc) {
            mxc = res.first + res.second;
        }
    }
    return gogo(0, n, 0, 0, mxc);
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:58:9: warning: variable 'lc' set but not used [-Wunused-but-set-variable]
     int lc = 0;
         ^
# Verdict Execution time Memory Grader output
1 Correct 4 ms 2024 KB Output is correct
2 Correct 2 ms 2024 KB Output is correct
3 Correct 2 ms 2024 KB Output is correct
4 Correct 5 ms 2024 KB Output is correct
5 Correct 12 ms 2024 KB Output is correct
6 Correct 0 ms 2024 KB Output is correct
7 Correct 3 ms 2024 KB Output is correct
8 Correct 2 ms 2024 KB Output is correct
9 Correct 4 ms 2024 KB Output is correct
10 Correct 0 ms 2024 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 1 ms 2024 KB Output is correct
2 Correct 8 ms 2024 KB Output is correct
3 Correct 9 ms 2024 KB Output is correct
4 Correct 2 ms 2024 KB Output is correct
5 Correct 2 ms 2024 KB Output is correct
6 Correct 0 ms 2024 KB Output is correct
7 Correct 2 ms 2024 KB Output is correct
8 Correct 1 ms 2024 KB Output is correct
9 Correct 4 ms 2024 KB Output is correct
10 Correct 4 ms 2024 KB Output is correct
11 Correct 5 ms 2024 KB Output is correct
12 Correct 8 ms 2024 KB Output is correct
13 Correct 9 ms 2156 KB Output is correct
14 Correct 7 ms 2024 KB Output is correct
15 Correct 6 ms 2156 KB Output is correct
16 Correct 13 ms 2288 KB Output is correct
17 Correct 0 ms 2024 KB Output is correct
18 Correct 25 ms 2288 KB Output is correct
19 Correct 12 ms 2024 KB Output is correct
20 Correct 3 ms 2156 KB Output is correct
21 Correct 4 ms 2156 KB Output is correct
22 Correct 5 ms 2156 KB Output is correct
23 Correct 0 ms 2024 KB Output is correct
24 Correct 3 ms 2024 KB Output is correct
25 Correct 10 ms 2156 KB Output is correct
26 Correct 15 ms 2156 KB Output is correct
27 Correct 2 ms 2024 KB Output is correct
28 Correct 7 ms 2288 KB Output is correct
29 Correct 15 ms 2288 KB Output is correct
30 Correct 21 ms 2288 KB Output is correct
31 Correct 0 ms 2024 KB Output is correct
32 Correct 10 ms 2156 KB Output is correct
33 Correct 0 ms 2024 KB Output is correct
34 Correct 6 ms 2156 KB Output is correct
35 Correct 0 ms 2024 KB Output is correct
36 Correct 10 ms 2156 KB Output is correct
37 Correct 0 ms 2024 KB Output is correct
38 Correct 4 ms 2024 KB Output is correct
39 Correct 0 ms 2156 KB Output is correct
40 Correct 6 ms 2288 KB Output is correct
41 Correct 1 ms 2288 KB Output is correct
42 Correct 13 ms 2288 KB Output is correct
43 Correct 5 ms 2156 KB Output is correct
44 Correct 4 ms 2156 KB Output is correct
45 Correct 6 ms 2156 KB Output is correct
46 Correct 5 ms 2024 KB Output is correct
47 Correct 10 ms 2156 KB Output is correct
48 Correct 21 ms 2288 KB Output is correct
49 Correct 0 ms 2156 KB Output is correct
50 Correct 13 ms 2288 KB Output is correct
51 Correct 7 ms 2156 KB Output is correct
52 Correct 2 ms 2024 KB Output is correct
53 Correct 2 ms 2024 KB Output is correct
54 Correct 6 ms 2156 KB Output is correct
55 Correct 2 ms 2024 KB Output is correct
56 Correct 7 ms 2288 KB Output is correct
57 Correct 8 ms 2288 KB Output is correct
58 Correct 19 ms 2288 KB Output is correct
59 Correct 10 ms 2288 KB Output is correct
60 Correct 6 ms 2156 KB Output is correct
61 Correct 2 ms 2024 KB Output is correct
62 Correct 4 ms 2024 KB Output is correct
63 Correct 3 ms 2024 KB Output is correct
64 Correct 3 ms 2024 KB Output is correct
65 Correct 14 ms 2024 KB Output is correct
66 Correct 2 ms 2156 KB Output is correct
67 Correct 5 ms 2024 KB Output is correct
68 Correct 0 ms 2024 KB Output is correct
69 Correct 0 ms 2156 KB Output is correct
70 Correct 15 ms 2024 KB Output is correct
71 Partially correct 5 ms 2420 KB Partially correct - number of queries: 5258
72 Correct 3 ms 2156 KB Output is correct
73 Partially correct 29 ms 2420 KB Partially correct - number of queries: 5195
74 Partially correct 13 ms 2420 KB Partially correct - number of queries: 5222
75 Correct 0 ms 2024 KB Output is correct
76 Correct 16 ms 2288 KB Output is correct
77 Correct 4 ms 2288 KB Output is correct
78 Correct 18 ms 2156 KB Output is correct
79 Correct 12 ms 2156 KB Output is correct
80 Correct 7 ms 2288 KB Output is correct
81 Correct 8 ms 2288 KB Output is correct
82 Correct 13 ms 2288 KB Output is correct
83 Correct 0 ms 2024 KB Output is correct
84 Correct 17 ms 2288 KB Output is correct
85 Correct 27 ms 2288 KB Output is correct
86 Correct 2 ms 2024 KB Output is correct
87 Correct 4 ms 2024 KB Output is correct
88 Correct 6 ms 2024 KB Output is correct
89 Correct 1 ms 2024 KB Output is correct
90 Correct 0 ms 2024 KB Output is correct
91 Correct 1 ms 2024 KB Output is correct
92 Correct 2 ms 2024 KB Output is correct
93 Correct 3 ms 2156 KB Output is correct
94 Correct 3 ms 2156 KB Output is correct
95 Correct 16 ms 2156 KB Output is correct
96 Correct 4 ms 2024 KB Output is correct
97 Correct 0 ms 2024 KB Output is correct