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Submission #937290

# Submission time Handle Problem Language Result Execution time Memory
937290 2024-03-03T18:48:25 Z snpmrnhlol The Big Prize (IOI17_prize) C++17
100 / 100
 26 ms 2880 KB 
#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int K = 500;
const int N = 2e5;
const int L = 5000;
const int mod = 998244353;
set <int> s;
int l2[N],r2[N];
int cnt = 0;
int mx = 0;
int qcount = 0;
int ans = -1;
int seed = 17;
int f(){
    return rng()%mod;
    seed = 1ll*seed*seed%mod;
    return seed;
}
vector<int> ask2(int x){
    if(l2[x] == 0 && r2[x] == 0){
        auto nr = ask(x);
        l2[x] = nr[0];
        r2[x] = nr[1];
    }
    return {l2[x],r2[x]};
}
void solve(int l,int r,int dl,int dr){
    if(dl + dr >= mx)return;
    if(l > r)return;
    int mij = (l + r)/2;
    for(int i = mij;i <= r;i++){
        auto x = ask2(i);
        if(x[0] + x[1] == mx){
            x[0]-=dl;
            x[1]-=dr;
            solve(i + 1,r,x[0] + dl,dr);
            if(ans != -1)return;
            solve(l,mij - 1,dl,dr + x[1] + i - mij);
            return;
        }else{
            if(x[0] + x[1] == 0){
                ans = i;
                return;
            }
        }
    }
    solve(l,mij - 1,dl,dr);
    return;
}
int find_best(int n) {
    for(int i = 0;i < K;i++){
        int id = f()%n;
        //cout<<id<<'\n';
        auto x = ask2(id);
        int nr = x[0] + x[1];
        if(nr == 0)return id;
        if(nr > mx){
            mx = nr;
            cnt = 1;
        }else if(nr == mx){
            cnt++;
        }
        if(mx > (int)sqrt(n)){
            break;
        }
    }
    solve(0,n - 1,0,0);
	return ans;
}
/**
8
3 3 3 3 2 2 2 1
**/

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2348 KB Output is correct
2 Correct 3 ms 1856 KB Output is correct
3 Correct 3 ms 1808 KB Output is correct
4 Correct 4 ms 2024 KB Output is correct
5 Correct 3 ms 1836 KB Output is correct
6 Correct 3 ms 1980 KB Output is correct
7 Correct 3 ms 1800 KB Output is correct
8 Correct 3 ms 1840 KB Output is correct
9 Correct 3 ms 1992 KB Output is correct
10 Correct 3 ms 1860 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2280 KB Output is correct
2 Correct 3 ms 2016 KB Output is correct
3 Correct 3 ms 1680 KB Output is correct
4 Correct 3 ms 1808 KB Output is correct
5 Correct 3 ms 1688 KB Output is correct
6 Correct 3 ms 2072 KB Output is correct
7 Correct 3 ms 1804 KB Output is correct
8 Correct 3 ms 2376 KB Output is correct
9 Correct 3 ms 2168 KB Output is correct
10 Correct 4 ms 1828 KB Output is correct
11 Correct 4 ms 1956 KB Output is correct
12 Correct 5 ms 1900 KB Output is correct
13 Correct 3 ms 2104 KB Output is correct
14 Correct 5 ms 456 KB Output is correct
15 Correct 23 ms 2440 KB Output is correct
16 Correct 4 ms 1400 KB Output is correct
17 Correct 26 ms 2692 KB Output is correct
18 Correct 0 ms 452 KB Output is correct
19 Correct 22 ms 2448 KB Output is correct
20 Correct 9 ms 1524 KB Output is correct
21 Correct 14 ms 1680 KB Output is correct
22 Correct 23 ms 2856 KB Output is correct
23 Correct 3 ms 2124 KB Output is correct
24 Correct 6 ms 2248 KB Output is correct
25 Correct 8 ms 1612 KB Output is correct
26 Correct 7 ms 1556 KB Output is correct
27 Correct 3 ms 1884 KB Output is correct
28 Correct 1 ms 516 KB Output is correct
29 Correct 4 ms 2112 KB Output is correct
30 Correct 1 ms 712 KB Output is correct
31 Correct 24 ms 2172 KB Output is correct
32 Correct 3 ms 1892 KB Output is correct
33 Correct 0 ms 448 KB Output is correct
34 Correct 13 ms 1984 KB Output is correct
35 Correct 3 ms 2092 KB Output is correct
36 Correct 20 ms 1676 KB Output is correct
37 Correct 4 ms 2388 KB Output is correct
38 Correct 4 ms 2056 KB Output is correct
39 Correct 10 ms 1888 KB Output is correct
40 Correct 3 ms 1804 KB Output is correct
41 Correct 10 ms 1160 KB Output is correct
42 Correct 8 ms 1228 KB Output is correct
43 Correct 10 ms 1676 KB Output is correct
44 Correct 13 ms 1948 KB Output is correct
45 Correct 13 ms 1580 KB Output is correct
46 Correct 26 ms 2376 KB Output is correct
47 Correct 11 ms 1376 KB Output is correct
48 Correct 6 ms 1456 KB Output is correct
49 Correct 23 ms 1956 KB Output is correct
50 Correct 0 ms 448 KB Output is correct
51 Correct 18 ms 1820 KB Output is correct
52 Correct 23 ms 2252 KB Output is correct
53 Correct 3 ms 2156 KB Output is correct
54 Correct 10 ms 1952 KB Output is correct
55 Correct 21 ms 2304 KB Output is correct
56 Correct 0 ms 452 KB Output is correct
57 Correct 6 ms 1492 KB Output is correct
58 Correct 7 ms 1184 KB Output is correct
59 Correct 8 ms 1556 KB Output is correct
60 Correct 9 ms 1396 KB Output is correct
61 Correct 3 ms 2012 KB Output is correct
62 Correct 4 ms 2532 KB Output is correct
63 Correct 3 ms 2588 KB Output is correct
64 Correct 3 ms 2104 KB Output is correct
65 Correct 3 ms 1880 KB Output is correct
66 Correct 2 ms 608 KB Output is correct
67 Correct 2 ms 448 KB Output is correct
68 Correct 3 ms 2084 KB Output is correct
69 Correct 3 ms 452 KB Output is correct
70 Correct 4 ms 1872 KB Output is correct
71 Correct 19 ms 2284 KB Output is correct
72 Correct 5 ms 2060 KB Output is correct
73 Correct 23 ms 2204 KB Output is correct
74 Correct 25 ms 2240 KB Output is correct
75 Correct 3 ms 2620 KB Output is correct
76 Correct 24 ms 2216 KB Output is correct
77 Correct 19 ms 2560 KB Output is correct
78 Correct 5 ms 2496 KB Output is correct
79 Correct 13 ms 2856 KB Output is correct
80 Correct 21 ms 2124 KB Output is correct
81 Correct 22 ms 2672 KB Output is correct
82 Correct 21 ms 2540 KB Output is correct
83 Correct 4 ms 1732 KB Output is correct
84 Correct 23 ms 2780 KB Output is correct
85 Correct 22 ms 2452 KB Output is correct
86 Correct 7 ms 2064 KB Output is correct
87 Correct 4 ms 2244 KB Output is correct
88 Correct 12 ms 2444 KB Output is correct
89 Correct 8 ms 1712 KB Output is correct
90 Correct 3 ms 2760 KB Output is correct
91 Correct 6 ms 2496 KB Output is correct
92 Correct 21 ms 2240 KB Output is correct
93 Correct 17 ms 2108 KB Output is correct
94 Correct 22 ms 2432 KB Output is correct
95 Correct 16 ms 2540 KB Output is correct
96 Correct 20 ms 2880 KB Output is correct
97 Correct 4 ms 2156 KB Output is correct