Submission #1113004

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1113004	2024-11-15T11:22:41 Z	SalihSahin	The Big Prize (IOI17_prize)	C++14	100 / 100	111 ms	12368 KB

prize

#include <bits/stdc++.h>
#define pb push_back
#include "prize.h"
 
using namespace std;
/*
static const int max_q = 10000;
static int n;
static int query_count = 0;
static vector<int> g;
static vector<vector<int> > rank_count;
 
vector<int> ask(int i) {
   query_count++;
   if(query_count > max_q) {
      cerr << "Query limit exceeded" << endl;
      //cout<<query_count<<" babag "<<endl;
      exit(0);
   }
 
   if(i < 0 || i >= n) {
      cerr << "Bad index: " << i << endl;
      exit(0);
   }
 
   vector<int> res(2);
   res[0] = rank_count[g[i] - 1][i + 1];
   res[1] = rank_count[g[i] - 1][n] - res[0];
   return res;
}
*/
 
const int MAXN = 2e5 + 5;
vector<vector<int> > check(MAXN, vector<int>(2, -1));
vector<int> small(MAXN);
 
void f(int n, int smallcnt, int l, int r, int cnt){
   if(l == r){
      small[l] = 1;
      return;
   }
   int mid = (l + r)/2;
   int m = -1;
 
   for(int delt = 0; delt <= (r - l + 1)/2 + 1; delt++){
      if(mid + delt <= r){
         if(check[mid + delt][0] == -1) check[mid + delt] = ask(mid + delt);
         if(check[mid + delt][0] + check[mid + delt][1] == smallcnt){
            m = mid + delt;
            break;
         }
         else{
            small[mid + delt] = 1;
         }
      }
 
      if(mid - delt >= l){
         if(check[mid - delt][0] == -1) check[mid - delt] = ask(mid - delt);
         if(check[mid - delt][0] + check[mid - delt][1] == smallcnt){
            m = mid - delt;
            break;
         }
         else{
            small[mid - delt] = 1;
         }
      }
   }
 
   if(m == -1) return; // aralıktaki herkes small ve tagledik
   if(l > 0 && check[l-1][0] == -1) check[l-1] = ask(l-1);
   if(r < n-1 && check[r+1][0] == -1) check[r+1] = ask(r+1);
 
   int solcnt = check[m][0] - (l > 0 ? check[l-1][0] : 0);
   int sagcnt = check[m][1] - (r < n-1 ? check[r+1][1] : 0);
   if(l <= m-1 && solcnt > 0){
      f(n, smallcnt, l, m-1, solcnt);
   }
 
   if(m+1 <= r && sagcnt > 0){
      f(n, smallcnt, m+1, r, sagcnt);
   }
}
 
int find_best(int n) {
   mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
   int smallcnt = 0;
   int kok = min(475, n);
 
   for(int i = 0; i < kok; i++){
      check[i] = ask(i);
      smallcnt = max(smallcnt, check[i][0] + check[i][1]);
      if(smallcnt > 30) break;
   }

   f(n, smallcnt, 0, n-1, smallcnt);
   int ans = -1;
   for(int i = 0; i < n; i++){
      if(small[i] == 1){
         if(check[i][0] == -1) check[i] = ask(i);
         if(check[i][0] + check[i][1] == 0){
            ans = i;
            break;
         }
      }
   }
   return ans;
}
/*
int main() {
   cin>>n;
   g.resize(n);
 
   for(int i = 0; i < n; i++) {
      cin>>g[i];
      if(g[i] < 1) {
         cerr << "Invalid rank " << g[i] << " at index " << i << endl;
         exit(0);
      }
   }
 
   int max_rank = *max_element(g.begin(), g.end());
 
   rank_count.resize(max_rank + 1, vector<int>(n + 1, 0));
   for(int r = 0; r <= max_rank; r++) {
      for(int i = 1; i <= n; i++) {
         rank_count[r][i] = rank_count[r][i - 1];
         if(g[i - 1] == r)
           rank_count[r][i]++;
      }
   }
 
   for(int i = 0; i <= n; i++)
      for(int r = 1; r <= max_rank; r++)
         rank_count[r][i] += rank_count[r - 1][i];
 
   int res = find_best(n);
   cout << res << endl << "Query count: " << query_count << endl;
   return 0;
}
*/
/*
int main() {
   mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
   int mx = 0;
   int t;
   cin>>t;
   while(t--){
      //cin>>n;
      //n = rng() % 55 + 7;
      n = 2e5 - rng() % 5000;
      g.resize(n);
 
      vector<int> cnts(3);
      cnts[0] = 1;
      cnts[1] = 3;
      cnts[2] = rng()%10 + 10;
      cnts[3] = rng()%20 + 400;
      cnts[4] = n - cnts[3] - cnts[2] - cnts[1] - cnts[0];
 
      for(int i = 0; i < n; i++){
         small[i] = 0;
         check[i][0] = check[i][1] = -1;
      }
      int ind = 0;
      for(int i = 0; i < n; i++){
         if(cnts[ind] == 0) ind++;
         g[i] = ind + 1;
         cnts[ind]--;
      }
 
      shuffle(g.begin(), g.end(), rng);
 
      for(int i = 0; i < n; i++) {
         if(g[i] < 1) {
            cerr << "Invalid rank " << g[i] << " at index " << i << endl;
            exit(0);
         }
      }
 
      int max_rank = *max_element(g.begin(), g.end());
 
      rank_count.clear();
      rank_count.resize(max_rank + 1, vector<int>(n + 1, 0));
      for(int r = 0; r <= max_rank; r++) {
         for(int i = 1; i <= n; i++) {
            rank_count[r][i] = rank_count[r][i - 1];
            if(g[i - 1] == r)
              rank_count[r][i]++;
         }
      }
 
      for(int i = 0; i <= n; i++)
         for(int r = 1; r <= max_rank; r++)
            rank_count[r][i] += rank_count[r - 1][i];
 
      int res = find_best(n);
      if(res == -1 || query_count > max_q){
         cout << res << endl << "Query count: " << query_count << endl;
      }
      mx = max(mx, query_count);
      query_count = 0;
   }
   cout<<mx<<endl;
   return 0;
}*/

Subtask #1

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	18 ms	12112 KB	Output is correct
2	Correct	17 ms	12112 KB	Output is correct
3	Correct	18 ms	12112 KB	Output is correct
4	Correct	17 ms	12112 KB	Output is correct
5	Correct	20 ms	12052 KB	Output is correct
6	Correct	19 ms	12112 KB	Output is correct
7	Correct	21 ms	12112 KB	Output is correct
8	Correct	19 ms	12112 KB	Output is correct
9	Correct	22 ms	12072 KB	Output is correct
10	Correct	18 ms	12112 KB	Output is correct

Subtask #2

80.0 / 80.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	19 ms	12112 KB	Output is correct
2	Correct	18 ms	12112 KB	Output is correct
3	Correct	18 ms	12368 KB	Output is correct
4	Correct	21 ms	12188 KB	Output is correct
5	Correct	16 ms	12112 KB	Output is correct
6	Correct	17 ms	12112 KB	Output is correct
7	Correct	16 ms	12112 KB	Output is correct
8	Correct	17 ms	12112 KB	Output is correct
9	Correct	21 ms	12112 KB	Output is correct
10	Correct	17 ms	12112 KB	Output is correct
11	Correct	17 ms	12112 KB	Output is correct
12	Correct	17 ms	12112 KB	Output is correct
13	Correct	17 ms	12112 KB	Output is correct
14	Correct	26 ms	12112 KB	Output is correct
15	Correct	78 ms	12176 KB	Output is correct
16	Correct	91 ms	12112 KB	Output is correct
17	Correct	102 ms	12176 KB	Output is correct
18	Correct	91 ms	12112 KB	Output is correct
19	Correct	82 ms	12172 KB	Output is correct
20	Correct	53 ms	12284 KB	Output is correct
21	Correct	83 ms	12112 KB	Output is correct
22	Correct	75 ms	12112 KB	Output is correct
23	Correct	21 ms	12112 KB	Output is correct
24	Correct	20 ms	12112 KB	Output is correct
25	Correct	90 ms	12176 KB	Output is correct
26	Correct	94 ms	12112 KB	Output is correct
27	Correct	25 ms	12104 KB	Output is correct
28	Correct	84 ms	12112 KB	Output is correct
29	Correct	84 ms	12112 KB	Output is correct
30	Correct	104 ms	12112 KB	Output is correct
31	Correct	89 ms	12172 KB	Output is correct
32	Correct	18 ms	12124 KB	Output is correct
33	Correct	12 ms	12112 KB	Output is correct
34	Correct	108 ms	12176 KB	Output is correct
35	Correct	20 ms	12112 KB	Output is correct
36	Correct	92 ms	12180 KB	Output is correct
37	Correct	16 ms	12112 KB	Output is correct
38	Correct	20 ms	12112 KB	Output is correct
39	Correct	92 ms	12172 KB	Output is correct
40	Correct	85 ms	12112 KB	Output is correct
41	Correct	90 ms	12112 KB	Output is correct
42	Correct	90 ms	12176 KB	Output is correct
43	Correct	99 ms	12112 KB	Output is correct
44	Correct	100 ms	12112 KB	Output is correct
45	Correct	89 ms	12364 KB	Output is correct
46	Correct	99 ms	12112 KB	Output is correct
47	Correct	89 ms	12112 KB	Output is correct
48	Correct	90 ms	12112 KB	Output is correct
49	Correct	90 ms	12112 KB	Output is correct
50	Correct	92 ms	12112 KB	Output is correct
51	Correct	98 ms	12180 KB	Output is correct
52	Correct	92 ms	12112 KB	Output is correct
53	Correct	22 ms	11972 KB	Output is correct
54	Correct	102 ms	12180 KB	Output is correct
55	Correct	101 ms	12196 KB	Output is correct
56	Correct	89 ms	12112 KB	Output is correct
57	Correct	101 ms	12112 KB	Output is correct
58	Correct	99 ms	12176 KB	Output is correct
59	Correct	108 ms	12028 KB	Output is correct
60	Correct	102 ms	12112 KB	Output is correct
61	Correct	22 ms	12112 KB	Output is correct
62	Correct	21 ms	12112 KB	Output is correct
63	Correct	25 ms	12136 KB	Output is correct
64	Correct	24 ms	12360 KB	Output is correct
65	Correct	13 ms	12148 KB	Output is correct
66	Correct	18 ms	12112 KB	Output is correct
67	Correct	18 ms	12112 KB	Output is correct
68	Correct	17 ms	12112 KB	Output is correct
69	Correct	18 ms	12368 KB	Output is correct
70	Correct	16 ms	12112 KB	Output is correct
71	Correct	111 ms	12172 KB	Output is correct
72	Correct	18 ms	12112 KB	Output is correct
73	Correct	96 ms	12112 KB	Output is correct
74	Correct	109 ms	12112 KB	Output is correct
75	Correct	17 ms	12112 KB	Output is correct
76	Correct	88 ms	12180 KB	Output is correct
77	Correct	93 ms	12180 KB	Output is correct
78	Correct	18 ms	12112 KB	Output is correct
79	Correct	52 ms	12076 KB	Output is correct
80	Correct	98 ms	12184 KB	Output is correct
81	Correct	95 ms	12112 KB	Output is correct
82	Correct	98 ms	12112 KB	Output is correct
83	Correct	17 ms	12176 KB	Output is correct
84	Correct	86 ms	12112 KB	Output is correct
85	Correct	89 ms	12112 KB	Output is correct
86	Correct	21 ms	12112 KB	Output is correct
87	Correct	11 ms	12136 KB	Output is correct
88	Correct	23 ms	12112 KB	Output is correct
89	Correct	26 ms	12112 KB	Output is correct
90	Correct	20 ms	12112 KB	Output is correct
91	Correct	16 ms	12112 KB	Output is correct
92	Correct	18 ms	12112 KB	Output is correct
93	Correct	20 ms	12112 KB	Output is correct
94	Correct	25 ms	12112 KB	Output is correct
95	Correct	26 ms	12128 KB	Output is correct
96	Correct	24 ms	12192 KB	Output is correct
97	Correct	18 ms	12112 KB	Output is correct