oj.uz

Submission #1113640

# Submission time Handle Problem Language Result Execution time Memory
1113640 2024-11-16T21:57:47 Z epicci23 The Big Prize (IOI17_prize) C++17
100 / 100
 105 ms 1772 KB 
#include "bits/stdc++.h"
#include "prize.h"
//#define int long long
#define all(v) v.begin() , v.end()
#define sz(a) (int)a.size()
using namespace std;
 
const int N = 2e5 + 5;
int mx = -1, n;
vector<bool> mark(N, 0);
map<int,vector<int>> dp;
 
vector<int> Ask(int i){
  if(dp.count(i)) return dp[i];
  return dp[i] = ask(i);
}
 
void Learn(int l, int r){
  if(l > r) return;
  if(l == r){
    mark[l] = 1; 
    return;
  }
  int mid = (l+r)/2 , p = -1;
  for(int i=0;i<=(r-l+1)/2;i++){
    if(mid+i<=r){
      vector<int> x = Ask(mid+i);
      if(x[0]+x[1]==mx){
        p=mid+i;
        break;
      }
      mark[mid+i]=1;
    }
    if(mid-i>=l){
      vector<int> x = Ask(mid-i);
      if(x[0]+x[1]==mx){
        p=mid-i;
        break;
      }
      mark[mid-i]=1;
    }
  }
  if(p == -1) return;
  if(l < p && Ask(p)[0] - (l > 0 ? Ask(l-1)[0] : 0) ) Learn(l, p - 1);
  if(p < r && Ask(p)[1] - (r + 1 < n ? Ask(r + 1)[1] : 0) ) Learn(p + 1, r);
}
 
int find_best(int _n){
  n = _n;
  for(int i = 0; i < min(n, 475); i++){
    vector<int> x = Ask(i);
    if(x[0] + x[1] == 0) return i;
    mx = max(mx, x[0] + x[1]);
    if(mx > 30) break;
  }

  Learn(0, n - 1);

  for(int i = 0 ; i < n ; i++){
    if(mark[i]){
      vector<int> x = Ask(i);
      if(x[0] + x[1] == 0) return i;
    }
  }

  return -23;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 336 KB Output is correct
2 Correct 9 ms 336 KB Output is correct
3 Correct 8 ms 508 KB Output is correct
4 Correct 9 ms 336 KB Output is correct
5 Correct 9 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 9 ms 1364 KB Output is correct
8 Correct 9 ms 592 KB Output is correct
9 Correct 8 ms 592 KB Output is correct
10 Correct 10 ms 496 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 592 KB Output is correct
2 Correct 9 ms 336 KB Output is correct
3 Correct 9 ms 336 KB Output is correct
4 Correct 8 ms 336 KB Output is correct
5 Correct 10 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 8 ms 592 KB Output is correct
8 Correct 9 ms 504 KB Output is correct
9 Correct 9 ms 336 KB Output is correct
10 Correct 10 ms 592 KB Output is correct
11 Correct 7 ms 336 KB Output is correct
12 Correct 9 ms 592 KB Output is correct
13 Correct 10 ms 336 KB Output is correct
14 Correct 17 ms 544 KB Output is correct
15 Correct 72 ms 784 KB Output is correct
16 Correct 82 ms 1496 KB Output is correct
17 Correct 95 ms 1148 KB Output is correct
18 Correct 89 ms 1092 KB Output is correct
19 Correct 83 ms 960 KB Output is correct
20 Correct 48 ms 1212 KB Output is correct
21 Correct 88 ms 1072 KB Output is correct
22 Correct 66 ms 856 KB Output is correct
23 Correct 10 ms 336 KB Output is correct
24 Correct 8 ms 500 KB Output is correct
25 Correct 66 ms 1268 KB Output is correct
26 Correct 70 ms 1012 KB Output is correct
27 Correct 11 ms 592 KB Output is correct
28 Correct 69 ms 1408 KB Output is correct
29 Correct 65 ms 852 KB Output is correct
30 Correct 89 ms 1052 KB Output is correct
31 Correct 74 ms 1084 KB Output is correct
32 Correct 8 ms 336 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 89 ms 1268 KB Output is correct
35 Correct 13 ms 336 KB Output is correct
36 Correct 81 ms 868 KB Output is correct
37 Correct 8 ms 728 KB Output is correct
38 Correct 10 ms 336 KB Output is correct
39 Correct 91 ms 1072 KB Output is correct
40 Correct 79 ms 1196 KB Output is correct
41 Correct 79 ms 1264 KB Output is correct
42 Correct 91 ms 828 KB Output is correct
43 Correct 93 ms 1592 KB Output is correct
44 Correct 101 ms 968 KB Output is correct
45 Correct 75 ms 992 KB Output is correct
46 Correct 89 ms 1356 KB Output is correct
47 Correct 87 ms 984 KB Output is correct
48 Correct 105 ms 1072 KB Output is correct
49 Correct 85 ms 1124 KB Output is correct
50 Correct 85 ms 900 KB Output is correct
51 Correct 86 ms 916 KB Output is correct
52 Correct 90 ms 1620 KB Output is correct
53 Correct 10 ms 336 KB Output is correct
54 Correct 85 ms 1132 KB Output is correct
55 Correct 83 ms 804 KB Output is correct
56 Correct 71 ms 1172 KB Output is correct
57 Correct 80 ms 1052 KB Output is correct
58 Correct 82 ms 872 KB Output is correct
59 Correct 82 ms 1200 KB Output is correct
60 Correct 87 ms 1568 KB Output is correct
61 Correct 10 ms 528 KB Output is correct
62 Correct 10 ms 336 KB Output is correct
63 Correct 9 ms 1292 KB Output is correct
64 Correct 10 ms 504 KB Output is correct
65 Correct 2 ms 336 KB Output is correct
66 Correct 9 ms 336 KB Output is correct
67 Correct 8 ms 592 KB Output is correct
68 Correct 7 ms 336 KB Output is correct
69 Correct 7 ms 504 KB Output is correct
70 Correct 7 ms 336 KB Output is correct
71 Correct 98 ms 1076 KB Output is correct
72 Correct 7 ms 336 KB Output is correct
73 Correct 77 ms 892 KB Output is correct
74 Correct 86 ms 1704 KB Output is correct
75 Correct 10 ms 592 KB Output is correct
76 Correct 69 ms 956 KB Output is correct
77 Correct 101 ms 1096 KB Output is correct
78 Correct 8 ms 336 KB Output is correct
79 Correct 43 ms 620 KB Output is correct
80 Correct 88 ms 1352 KB Output is correct
81 Correct 91 ms 1772 KB Output is correct
82 Correct 84 ms 988 KB Output is correct
83 Correct 12 ms 336 KB Output is correct
84 Correct 84 ms 1072 KB Output is correct
85 Correct 96 ms 836 KB Output is correct
86 Correct 10 ms 592 KB Output is correct
87 Correct 2 ms 336 KB Output is correct
88 Correct 9 ms 336 KB Output is correct
89 Correct 6 ms 336 KB Output is correct
90 Correct 10 ms 592 KB Output is correct
91 Correct 6 ms 336 KB Output is correct
92 Correct 6 ms 336 KB Output is correct
93 Correct 14 ms 336 KB Output is correct
94 Correct 16 ms 592 KB Output is correct
95 Correct 16 ms 740 KB Output is correct
96 Correct 11 ms 336 KB Output is correct
97 Correct 7 ms 336 KB Output is correct