oj.uz

Submission #1048658

# Submission time Handle Problem Language Result Execution time Memory
1048658 2024-08-08T08:57:47 Z pcc The Big Prize (IOI17_prize) C++17
98.02 / 100
 103 ms 3740 KB 
#include "prize.h"
#include <bits/stdc++.h>
#include <bits/extc++.h>
using namespace __gnu_pbds;
using namespace std;

template <typename T>
using ordered_set = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
#define pii pair<int,int>
#define fs first
#define sc second
mt19937 seed(time(NULL));
#define rnd(l,r) uniform_int_distribution<int>(l,r)(seed)

#ifdef LOCAL
const int lim = 3;
const int dt = 5;
#else
const int lim = 5000;
const int dt = 470;
#endif

const int mxn = 2e5+10;
pii dp[mxn];
int N;
int big = 1e9;
int ans = 0;
bool done = false;
int C = 0;
ordered_set<int> st;

pii req(int p){
	if(dp[p].fs != -1)return dp[p];
	C++;
	assert(C<=10000);
	auto re = ask(p);
	return (dp[p] = pii(re[0],re[1]));
}

int check(int p){
	auto re = req(p);
	if(!re.fs&&!re.sc)return 0;
	else if(N-re.fs-re.sc == big)return 2;
	else{
		st.insert(p);
		return 1;
	}
}

deque<pii> q;

void calc(){
	if(done)return;
	int l,r;
	if(rnd(0,1)){
		auto [a,b] = q.front();q.pop_front();
		l = a,r = b;
	}
	else{
		auto [a,b] = q.back();q.pop_back();
		l = a,r = b;
	}
	cerr<<"DFS: "<<l<<','<<r<<endl;
	while(l<=r){
		if(!check(l)){
			ans = l;
			done = true;
			return;
		}
		else if(check(l) == 1){
			l++;
		}
		else break;
	}
	while(l<=r){
		if(!check(r)){
			ans = r;
			done = true;
			return;
		}
		else if(check(r) == 1){
			r--;
		}
		else break;
	}
	if(l>=r)return;
	int cnt = req(r).fs+req(l).sc-(N-big);
	if(!cnt)return;
	cerr<<"CHECK: "<<l<<','<<r<<','<<cnt<<endl;
	assert(cnt>0);
	int mid = (l+r+1)>>1;
	if(check(mid) == 0){
		ans = mid;
		done = true;
		return;
	}
	if(l == r)return;
	if(l != mid)q.push_back(pii(l,mid));
	if(mid != r)q.push_back(pii(mid,r));
	return;
}

int find_best(int nn) {
	N = nn;
	int pt = 0;
	for(int i = 1;i*i<2e5;i++)pt = i;
	cerr<<pt<<endl;
	for(auto &i:dp)i = pii(-1,-1);
	if(N<=lim){
		for(int i = 0;i<N;i++){
			auto tmp = req(i);
			if(!tmp.fs&&!tmp.sc)return i;
		}
		assert(false);
		return 0;
	}
	vector<int> perm;
	for(int i = 0;i<N;i++)perm.push_back(i);
	shuffle(perm.begin(),perm.end(),seed);
	for(int i = 0;i<dt;i++){
		auto tmp = req(perm[i]);
		big = min(big,N-tmp.fs-tmp.sc);
		if(!tmp.fs&&!tmp.sc){
			return perm[i];
		}
	}
	cerr<<"BIG: "<<big<<endl;
	q.push_back(pii(0,N-1));
	while(!q.empty()&&!done)calc();
	if(!done)exit(0);
	return ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 3024 KB Output is correct
2 Correct 5 ms 3004 KB Output is correct
3 Correct 6 ms 3024 KB Output is correct
4 Correct 6 ms 3024 KB Output is correct
5 Correct 6 ms 3024 KB Output is correct
6 Correct 6 ms 3024 KB Output is correct
7 Correct 6 ms 3024 KB Output is correct
8 Correct 5 ms 3024 KB Output is correct
9 Correct 6 ms 3120 KB Output is correct
10 Correct 5 ms 3024 KB Output is correct

Subtask #2
78.02 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 3024 KB Output is correct
2 Correct 5 ms 3024 KB Output is correct
3 Correct 5 ms 3116 KB Output is correct
4 Correct 5 ms 3024 KB Output is correct
5 Correct 5 ms 3024 KB Output is correct
6 Correct 5 ms 3024 KB Output is correct
7 Correct 5 ms 3024 KB Output is correct
8 Correct 5 ms 3024 KB Output is correct
9 Correct 5 ms 3024 KB Output is correct
10 Correct 6 ms 3024 KB Output is correct
11 Correct 11 ms 3024 KB Output is correct
12 Correct 10 ms 3024 KB Output is correct
13 Correct 8 ms 3024 KB Output is correct
14 Correct 4 ms 2136 KB Output is correct
15 Correct 84 ms 3464 KB Output is correct
16 Correct 38 ms 3024 KB Output is correct
17 Partially correct 83 ms 3020 KB Partially correct - number of queries: 5014
18 Correct 76 ms 3024 KB Output is correct
19 Correct 69 ms 3264 KB Output is correct
20 Correct 21 ms 2516 KB Output is correct
21 Correct 63 ms 3024 KB Output is correct
22 Correct 69 ms 3276 KB Output is correct
23 Correct 7 ms 3024 KB Output is correct
24 Correct 12 ms 3128 KB Output is correct
25 Correct 65 ms 3052 KB Output is correct
26 Correct 74 ms 3292 KB Output is correct
27 Correct 9 ms 3024 KB Output is correct
28 Correct 58 ms 3024 KB Output is correct
29 Correct 78 ms 3244 KB Output is correct
30 Correct 44 ms 3024 KB Output is correct
31 Correct 81 ms 3264 KB Output is correct
32 Correct 10 ms 3024 KB Output is correct
33 Correct 1 ms 1880 KB Output is correct
34 Correct 74 ms 3740 KB Output is correct
35 Correct 11 ms 3024 KB Output is correct
36 Correct 55 ms 3024 KB Output is correct
37 Correct 9 ms 3024 KB Output is correct
38 Correct 6 ms 3024 KB Output is correct
39 Correct 79 ms 3024 KB Output is correct
40 Correct 66 ms 3332 KB Output is correct
41 Partially correct 85 ms 3276 KB Partially correct - number of queries: 5060
42 Partially correct 91 ms 3224 KB Partially correct - number of queries: 5060
43 Correct 58 ms 3044 KB Output is correct
44 Correct 57 ms 3024 KB Output is correct
45 Correct 23 ms 3024 KB Output is correct
46 Correct 80 ms 3024 KB Output is correct
47 Correct 58 ms 3024 KB Output is correct
48 Correct 103 ms 3188 KB Output is correct
49 Correct 103 ms 3192 KB Output is correct
50 Correct 88 ms 3096 KB Output is correct
51 Correct 76 ms 3024 KB Output is correct
52 Partially correct 90 ms 3024 KB Partially correct - number of queries: 5079
53 Correct 7 ms 3024 KB Output is correct
54 Correct 88 ms 3236 KB Output is correct
55 Correct 76 ms 3024 KB Output is correct
56 Correct 84 ms 3236 KB Output is correct
57 Correct 48 ms 3272 KB Output is correct
58 Correct 87 ms 3248 KB Output is correct
59 Correct 75 ms 3264 KB Output is correct
60 Correct 95 ms 3252 KB Output is correct
61 Correct 6 ms 3020 KB Output is correct
62 Correct 7 ms 3024 KB Output is correct
63 Correct 7 ms 3020 KB Output is correct
64 Correct 7 ms 3024 KB Output is correct
65 Correct 5 ms 3024 KB Output is correct
66 Correct 5 ms 3024 KB Output is correct
67 Correct 7 ms 3024 KB Output is correct
68 Correct 7 ms 3024 KB Output is correct
69 Correct 5 ms 3024 KB Output is correct
70 Correct 5 ms 3024 KB Output is correct
71 Partially correct 92 ms 3340 KB Partially correct - number of queries: 5198
72 Correct 13 ms 3024 KB Output is correct
73 Partially correct 93 ms 3024 KB Partially correct - number of queries: 5137
74 Partially correct 94 ms 3024 KB Partially correct - number of queries: 5146
75 Correct 10 ms 3024 KB Output is correct
76 Correct 92 ms 3500 KB Output is correct
77 Partially correct 95 ms 3024 KB Partially correct - number of queries: 5172
78 Correct 18 ms 3024 KB Output is correct
79 Correct 49 ms 3024 KB Output is correct
80 Correct 96 ms 3312 KB Output is correct
81 Partially correct 84 ms 3024 KB Partially correct - number of queries: 5079
82 Partially correct 86 ms 3376 KB Partially correct - number of queries: 5091
83 Correct 7 ms 3024 KB Output is correct
84 Correct 68 ms 3164 KB Output is correct
85 Partially correct 85 ms 3480 KB Partially correct - number of queries: 5170
86 Correct 57 ms 3024 KB Output is correct
87 Correct 8 ms 3024 KB Output is correct
88 Correct 66 ms 3024 KB Output is correct
89 Correct 58 ms 3292 KB Output is correct
90 Correct 7 ms 3024 KB Output is correct
91 Correct 46 ms 3024 KB Output is correct
92 Correct 58 ms 3276 KB Output is correct
93 Correct 88 ms 3276 KB Output is correct
94 Correct 75 ms 3024 KB Output is correct
95 Correct 79 ms 3268 KB Output is correct
96 Correct 58 ms 3220 KB Output is correct
97 Correct 37 ms 3176 KB Output is correct