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Submission #982752

# Submission time Handle Problem Language Result Execution time Memory
982752 2024-05-14T17:16:15 Z Lalic The Big Prize (IOI17_prize) C++17
100 / 100
 28 ms 4704 KB 
#include "prize.h"
#include <bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define pb push_back
#define all(x) x.begin(), x.end()
#define allr(x) x.rbegin(), x.rend()
#define mp make_pair

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 2e5+10;
const int MOD = 1e9+7;
const int INF = 0x3f3f3f3f;
const ll LINF = 0x3f3f3f3f3f3f3f3f;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int bit[MAXN];

void add(int pos, int x, int n){ for(;pos<=n;pos+=(pos&-pos)) bit[pos]+=x; }
int get(int pos){
	int ret=0;
	for(;pos>0;pos-=(pos&-pos)) ret+=bit[pos];
	return ret;
}

pii memo[MAXN];

pii query(int x){
	if(memo[x].fi!=-1) return memo[x];
	vector<int> temp=ask(x);
	return memo[x]={temp[0], temp[1]};
}

int mark[MAXN], tot;

int getNext(int l, int r, int comp, int n){
	if(r<l) return -1;
	
	int curr=(l+r)>>1;
	pii at=query(curr);
	
	if(!mark[curr] && at.fi+at.se<comp){
		mark[curr]=1;
		add(curr+1, 1, n);
		return curr;
	}
	
	if(at.fi+at.se==comp){
		if(at.se>get(n)-get(curr+1)) return getNext(curr+1, r, comp, n);
		return getNext(l, curr-1, comp, n);
	}
	
	int temp=getNext(curr+1, r, comp, n);
	if(temp!=-1) return temp;
	return getNext(l, curr-1, comp, n);
}

int find_best(int n){
	for(int i=0;i<n;i++) memo[i]={-1, -1};
	
	int ver=-1, val=-1;
	
	for(int i=0;i<8;i++){
		int curr=rng()%n;
		pii at=query(curr);
		if(at.fi+at.se>val){
			val=at.fi+at.se;
			ver=curr;
		}
	}
	
	for(int i=0;i<query(ver).se;i++){
		int curr=getNext(ver+1, n-1, val, n);
		tot++;
		
		if(curr==-1) break;
		
		pii aux=query(curr);
		if(aux.fi+aux.se==0)
			return curr;
	}
	
	tot=query(ver).se;
	
	for(int i=0;i<query(ver).fi;i++){
		int curr=getNext(0, ver-1, val, n);
		tot++;
		
		if(curr==-1) break;
		
		pii aux=query(curr);
		if(aux.fi+aux.se==0)
			return curr;
	}
	
	return -1;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2620 KB Output is correct
2 Correct 1 ms 2624 KB Output is correct
3 Correct 1 ms 2620 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 1 ms 2624 KB Output is correct
6 Correct 1 ms 2624 KB Output is correct
7 Correct 1 ms 2624 KB Output is correct
8 Correct 1 ms 2620 KB Output is correct
9 Correct 1 ms 2620 KB Output is correct
10 Correct 1 ms 2628 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2624 KB Output is correct
3 Correct 1 ms 2628 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 1 ms 2624 KB Output is correct
6 Correct 1 ms 2624 KB Output is correct
7 Correct 1 ms 2780 KB Output is correct
8 Correct 1 ms 2620 KB Output is correct
9 Correct 1 ms 2620 KB Output is correct
10 Correct 1 ms 2624 KB Output is correct
11 Correct 2 ms 2884 KB Output is correct
12 Correct 3 ms 3312 KB Output is correct
13 Correct 1 ms 2648 KB Output is correct
14 Correct 4 ms 3016 KB Output is correct
15 Correct 15 ms 3452 KB Output is correct
16 Correct 5 ms 3184 KB Output is correct
17 Correct 26 ms 4116 KB Output is correct
18 Correct 1 ms 2392 KB Output is correct
19 Correct 24 ms 3744 KB Output is correct
20 Correct 9 ms 3316 KB Output is correct
21 Correct 16 ms 3480 KB Output is correct
22 Correct 21 ms 3396 KB Output is correct
23 Correct 1 ms 2636 KB Output is correct
24 Correct 3 ms 3180 KB Output is correct
25 Correct 9 ms 3600 KB Output is correct
26 Correct 11 ms 3144 KB Output is correct
27 Correct 1 ms 2640 KB Output is correct
28 Correct 1 ms 2624 KB Output is correct
29 Correct 2 ms 2900 KB Output is correct
30 Correct 1 ms 2392 KB Output is correct
31 Correct 22 ms 4188 KB Output is correct
32 Correct 2 ms 2632 KB Output is correct
33 Correct 1 ms 2500 KB Output is correct
34 Correct 13 ms 3744 KB Output is correct
35 Correct 1 ms 2892 KB Output is correct
36 Correct 15 ms 3764 KB Output is correct
37 Correct 2 ms 2904 KB Output is correct
38 Correct 2 ms 2892 KB Output is correct
39 Correct 11 ms 3528 KB Output is correct
40 Correct 1 ms 2392 KB Output is correct
41 Correct 8 ms 3600 KB Output is correct
42 Correct 8 ms 3992 KB Output is correct
43 Correct 8 ms 3148 KB Output is correct
44 Correct 17 ms 3536 KB Output is correct
45 Correct 13 ms 4092 KB Output is correct
46 Correct 23 ms 4284 KB Output is correct
47 Correct 8 ms 3356 KB Output is correct
48 Correct 7 ms 3472 KB Output is correct
49 Correct 15 ms 4404 KB Output is correct
50 Correct 1 ms 2648 KB Output is correct
51 Correct 17 ms 3852 KB Output is correct
52 Correct 18 ms 4212 KB Output is correct
53 Correct 1 ms 2624 KB Output is correct
54 Correct 13 ms 3304 KB Output is correct
55 Correct 24 ms 3536 KB Output is correct
56 Correct 1 ms 2392 KB Output is correct
57 Correct 6 ms 2724 KB Output is correct
58 Correct 5 ms 3456 KB Output is correct
59 Correct 10 ms 3692 KB Output is correct
60 Correct 9 ms 3192 KB Output is correct
61 Correct 1 ms 2780 KB Output is correct
62 Correct 1 ms 2892 KB Output is correct
63 Correct 1 ms 2620 KB Output is correct
64 Correct 1 ms 2636 KB Output is correct
65 Correct 1 ms 2388 KB Output is correct
66 Correct 1 ms 2392 KB Output is correct
67 Correct 3 ms 2388 KB Output is correct
68 Correct 1 ms 2624 KB Output is correct
69 Correct 1 ms 2392 KB Output is correct
70 Correct 2 ms 2392 KB Output is correct
71 Correct 27 ms 3444 KB Output is correct
72 Correct 3 ms 2968 KB Output is correct
73 Correct 22 ms 3668 KB Output is correct
74 Correct 28 ms 4208 KB Output is correct
75 Correct 1 ms 2748 KB Output is correct
76 Correct 22 ms 4704 KB Output is correct
77 Correct 21 ms 4300 KB Output is correct
78 Correct 2 ms 3136 KB Output is correct
79 Correct 9 ms 4160 KB Output is correct
80 Correct 24 ms 4156 KB Output is correct
81 Correct 23 ms 4412 KB Output is correct
82 Correct 26 ms 3948 KB Output is correct
83 Correct 1 ms 2620 KB Output is correct
84 Correct 19 ms 3812 KB Output is correct
85 Correct 25 ms 4324 KB Output is correct
86 Correct 2 ms 3072 KB Output is correct
87 Correct 1 ms 2624 KB Output is correct
88 Correct 1 ms 3136 KB Output is correct
89 Correct 2 ms 2880 KB Output is correct
90 Correct 1 ms 2392 KB Output is correct
91 Correct 1 ms 2628 KB Output is correct
92 Correct 1 ms 2392 KB Output is correct
93 Correct 2 ms 2848 KB Output is correct
94 Correct 2 ms 2880 KB Output is correct
95 Correct 2 ms 2912 KB Output is correct
96 Correct 2 ms 3012 KB Output is correct
97 Correct 1 ms 2620 KB Output is correct