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Submission #986045

# Submission time Handle Problem Language Result Execution time Memory
986045 2024-05-19T16:48:57 Z AlphaMale06 The Big Prize (IOI17_prize) C++17
20 / 100
 51 ms 600 KB 
#include <bits/stdc++.h>

#include "prize.h"

using namespace std;

//vector<int> ask(int i);

int find_best(int n){
	if(n<=5000){
        for(int i=0; i<n; i++){
            vector<int> ans = ask(i);
            if(ans[0]==0 && ans[1]==0)return i;
        }
	}
    int summ = 0;
    for(int i=0; i<10; i++){
        int ind = rand()%n;
        vector<int> ans = ask(ind);
        summ=max(summ, ans[0]+ans[1]);
        if(ans[0]==0 && ans[1]==0)return ind;
    }
    int prev=-1;
    for(int i=0; i<summ; i++){
        int l = prev+1, r = n-1;
        int best = n-1;
        while(l<=r){
            int s = l+r>>1;
            vector<int> ans = ask(s);
            if(ans[0]+ans[1]==0)return s;
            if(ans[0]+ans[1]==summ){
                if(ans[0]>i){
                    best=s-1;
                    r=s-1;
                }
                else l=s+1;
            }
            else{
                best = s;
                r=s-1;
            }
        }
        vector<int> ans = ask(best);
        prev=best;
        if(ans[0]+ans[1]==0)return best;
    }
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:28:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   28 |             int s = l+r>>1;
      |                     ~^~
prize.cpp:47:1: warning: control reaches end of non-void function [-Wreturn-type]
   47 | }
      | ^

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 596 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 2 ms 344 KB Output is correct
15 Correct 5 ms 428 KB Output is correct
16 Partially correct 43 ms 344 KB Partially correct - number of queries: 6949
17 Correct 1 ms 344 KB Output is correct
18 Partially correct 32 ms 344 KB Partially correct - number of queries: 8146
19 Correct 1 ms 344 KB Output is correct
20 Correct 8 ms 344 KB Output is correct
21 Correct 13 ms 344 KB Output is correct
22 Correct 2 ms 356 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 20 ms 344 KB Output is correct
26 Correct 19 ms 344 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Partially correct 35 ms 344 KB Partially correct - number of queries: 7778
29 Partially correct 23 ms 344 KB Partially correct - number of queries: 5887
30 Partially correct 37 ms 344 KB Partially correct - number of queries: 8077
31 Correct 0 ms 344 KB Output is correct
32 Correct 2 ms 344 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 15 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 7 ms 344 KB Output is correct
37 Correct 1 ms 344 KB Output is correct
38 Correct 0 ms 344 KB Output is correct
39 Correct 12 ms 344 KB Output is correct
40 Partially correct 32 ms 344 KB Partially correct - number of queries: 6899
41 Correct 25 ms 344 KB Output is correct
42 Correct 26 ms 340 KB Output is correct
43 Correct 19 ms 344 KB Output is correct
44 Correct 13 ms 344 KB Output is correct
45 Correct 11 ms 344 KB Output is correct
46 Correct 1 ms 596 KB Output is correct
47 Correct 15 ms 344 KB Output is correct
48 Partially correct 31 ms 600 KB Partially correct - number of queries: 6034
49 Correct 3 ms 344 KB Output is correct
50 Partially correct 36 ms 428 KB Partially correct - number of queries: 8135
51 Correct 15 ms 344 KB Output is correct
52 Correct 1 ms 344 KB Output is correct
53 Correct 1 ms 344 KB Output is correct
54 Correct 12 ms 344 KB Output is correct
55 Correct 0 ms 344 KB Output is correct
56 Partially correct 30 ms 344 KB Partially correct - number of queries: 8143
57 Partially correct 26 ms 344 KB Partially correct - number of queries: 5950
58 Partially correct 31 ms 344 KB Partially correct - number of queries: 6052
59 Correct 21 ms 344 KB Output is correct
60 Correct 24 ms 344 KB Output is correct
61 Correct 1 ms 344 KB Output is correct
62 Correct 1 ms 344 KB Output is correct
63 Correct 1 ms 344 KB Output is correct
64 Correct 1 ms 344 KB Output is correct
65 Correct 3 ms 344 KB Output is correct
66 Correct 14 ms 344 KB Output is correct
67 Correct 1 ms 344 KB Output is correct
68 Correct 5 ms 428 KB Output is correct
69 Correct 20 ms 344 KB Output is correct
70 Correct 0 ms 344 KB Output is correct
71 Partially correct 33 ms 596 KB Partially correct - number of queries: 8347
72 Correct 3 ms 344 KB Output is correct
73 Partially correct 43 ms 344 KB Partially correct - number of queries: 8221
74 Partially correct 37 ms 344 KB Partially correct - number of queries: 8275
75 Correct 1 ms 344 KB Output is correct
76 Partially correct 30 ms 344 KB Partially correct - number of queries: 7078
77 Partially correct 35 ms 344 KB Partially correct - number of queries: 8212
78 Correct 2 ms 344 KB Output is correct
79 Correct 19 ms 344 KB Output is correct
80 Partially correct 33 ms 344 KB Partially correct - number of queries: 8205
81 Partially correct 36 ms 344 KB Partially correct - number of queries: 8201
82 Partially correct 46 ms 340 KB Partially correct - number of queries: 8129
83 Correct 1 ms 344 KB Output is correct
84 Partially correct 28 ms 344 KB Partially correct - number of queries: 6687
85 Partially correct 35 ms 344 KB Partially correct - number of queries: 8212
86 Partially correct 32 ms 344 KB Partially correct - number of queries: 7844
87 Incorrect 51 ms 344 KB Incorrect
88 Halted 0 ms 0 KB -