oj.uz

Submission #816634

# Submission time Handle Problem Language Result Execution time Memory
816634 2023-08-09T05:58:19 Z ono_de206 The Big Prize (IOI17_prize) C++14
100 / 100
 51 ms 1892 KB 
#include "prize.h"
#include<bits/stdc++.h>
using namespace std;

#define in insert
#define all(x) x.begin(),x.end()
#define pb push_back
#define eb emplace_back
#define ff first
#define ss second

//#define int long long

typedef long long ll;
typedef vector<int> vi;
typedef set<int> si;
typedef multiset<int> msi;
typedef pair<int, int> pii;
typedef vector<pii> vpii;

// mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

const int mxn = 2e5 + 10;
pair<int, int> did[mxn];
int mx, ans, n;

int get(int i) {
	if(did[i].ff != -1) return did[i].ff + did[i].ss;
	auto sus = ask(i);
	did[i].ff = sus[0]; did[i].ss = sus[1];
	return did[i].ff + did[i].ss;
}

int getl(int i) {
	if(i < 0 || i >= n) return 0;
	if(did[i].ff != -1) return did[i].ff;
	get(i);
	return did[i].ff;
}

int getr(int i) {
	if(i < 0 || i >= n) return 0;
	if(did[i].ss != -1) return did[i].ss;
	get(i);
	return did[i].ss;
}

void solve(int l, int r) {
	if(l > r) return;
	int m = (l + r) / 2;
	if(get(m) == 0) ans = m;
	if(l == r) return;
	int m1 = m, m2 = m;
	while(m1 >= l && get(m1) < mx) {
		if(get(m1) == 0) ans = m1;
		m1--;
	}
	while(m2 <= r && get(m2) < mx) {
		if(get(m2) == 0) ans = m2;
		m2++;
	}
 
	if(m1 >= l && did[m1].ff > getl(l - 1)) solve(l, m1 - 1);
	if(r >= m2 && did[m2].ss > getr(r + 1)) solve(m2 + 1, r);
}

int find_best(int _n) {
	n = _n;
	if(n == 1) return 0;
	for(int i = 0; i < n; i++) {
		did[i] = {-1, -1};
	}
	if(n <= 5000) {
		for(int i = 0; i < n; i++) {
			if(get(i) == 0) return i;
		}
		return -69;
	}
	ans = -1;
	srand(time(NULL));
	for(int i = 0; i < 100; i++) {
		int x = rand() % n;
		assert(x >= 0 && x <= n);
		if(get(x) == 0) return x;
		mx = max(mx, get(x));
	}
	solve(0, n - 1);
	assert(ans != -1);
	return ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1744 KB Output is correct
2 Correct 2 ms 1744 KB Output is correct
3 Correct 2 ms 1740 KB Output is correct
4 Correct 2 ms 1840 KB Output is correct
5 Correct 2 ms 1832 KB Output is correct
6 Correct 2 ms 1744 KB Output is correct
7 Correct 3 ms 1836 KB Output is correct
8 Correct 1 ms 1768 KB Output is correct
9 Correct 2 ms 1828 KB Output is correct
10 Correct 1 ms 1744 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1836 KB Output is correct
2 Correct 1 ms 1836 KB Output is correct
3 Correct 2 ms 1744 KB Output is correct
4 Correct 2 ms 1744 KB Output is correct
5 Correct 2 ms 1832 KB Output is correct
6 Correct 2 ms 1836 KB Output is correct
7 Correct 1 ms 1744 KB Output is correct
8 Correct 2 ms 1836 KB Output is correct
9 Correct 2 ms 1832 KB Output is correct
10 Correct 2 ms 1744 KB Output is correct
11 Correct 4 ms 1744 KB Output is correct
12 Correct 3 ms 1840 KB Output is correct
13 Correct 5 ms 1872 KB Output is correct
14 Correct 7 ms 464 KB Output is correct
15 Correct 27 ms 1744 KB Output is correct
16 Correct 32 ms 1832 KB Output is correct
17 Correct 17 ms 1832 KB Output is correct
18 Correct 29 ms 1836 KB Output is correct
19 Correct 20 ms 1832 KB Output is correct
20 Correct 16 ms 976 KB Output is correct
21 Correct 17 ms 1836 KB Output is correct
22 Correct 23 ms 1832 KB Output is correct
23 Correct 3 ms 1744 KB Output is correct
24 Correct 5 ms 1836 KB Output is correct
25 Correct 16 ms 1832 KB Output is correct
26 Correct 27 ms 1744 KB Output is correct
27 Correct 2 ms 1836 KB Output is correct
28 Correct 30 ms 1736 KB Output is correct
29 Correct 26 ms 1744 KB Output is correct
30 Correct 31 ms 1836 KB Output is correct
31 Correct 29 ms 1892 KB Output is correct
32 Correct 5 ms 1832 KB Output is correct
33 Correct 0 ms 208 KB Output is correct
34 Correct 38 ms 1832 KB Output is correct
35 Correct 4 ms 1832 KB Output is correct
36 Correct 28 ms 1836 KB Output is correct
37 Correct 4 ms 1744 KB Output is correct
38 Correct 3 ms 1744 KB Output is correct
39 Correct 27 ms 1828 KB Output is correct
40 Correct 33 ms 1744 KB Output is correct
41 Correct 29 ms 1832 KB Output is correct
42 Correct 20 ms 1836 KB Output is correct
43 Correct 35 ms 1744 KB Output is correct
44 Correct 37 ms 1836 KB Output is correct
45 Correct 22 ms 1836 KB Output is correct
46 Correct 27 ms 1744 KB Output is correct
47 Correct 21 ms 1840 KB Output is correct
48 Correct 39 ms 1864 KB Output is correct
49 Correct 29 ms 1836 KB Output is correct
50 Correct 24 ms 1836 KB Output is correct
51 Correct 18 ms 1828 KB Output is correct
52 Correct 32 ms 1832 KB Output is correct
53 Correct 3 ms 1840 KB Output is correct
54 Correct 38 ms 1744 KB Output is correct
55 Correct 41 ms 1840 KB Output is correct
56 Correct 45 ms 1832 KB Output is correct
57 Correct 35 ms 1836 KB Output is correct
58 Correct 35 ms 1744 KB Output is correct
59 Correct 17 ms 1832 KB Output is correct
60 Correct 31 ms 1836 KB Output is correct
61 Correct 3 ms 1832 KB Output is correct
62 Correct 2 ms 1840 KB Output is correct
63 Correct 3 ms 1836 KB Output is correct
64 Correct 2 ms 1836 KB Output is correct
65 Correct 2 ms 1828 KB Output is correct
66 Correct 6 ms 1832 KB Output is correct
67 Correct 6 ms 1840 KB Output is correct
68 Correct 4 ms 1828 KB Output is correct
69 Correct 4 ms 1824 KB Output is correct
70 Correct 4 ms 1744 KB Output is correct
71 Correct 33 ms 1744 KB Output is correct
72 Correct 4 ms 1744 KB Output is correct
73 Correct 17 ms 1744 KB Output is correct
74 Correct 36 ms 1744 KB Output is correct
75 Correct 3 ms 1788 KB Output is correct
76 Correct 35 ms 1744 KB Output is correct
77 Correct 29 ms 1744 KB Output is correct
78 Correct 6 ms 1744 KB Output is correct
79 Correct 16 ms 1744 KB Output is correct
80 Correct 49 ms 1836 KB Output is correct
81 Correct 51 ms 1744 KB Output is correct
82 Correct 47 ms 1744 KB Output is correct
83 Correct 3 ms 1744 KB Output is correct
84 Correct 25 ms 1836 KB Output is correct
85 Correct 33 ms 1792 KB Output is correct
86 Correct 9 ms 1792 KB Output is correct
87 Correct 5 ms 1832 KB Output is correct
88 Correct 12 ms 1836 KB Output is correct
89 Correct 16 ms 1840 KB Output is correct
90 Correct 3 ms 1792 KB Output is correct
91 Correct 14 ms 1784 KB Output is correct
92 Correct 16 ms 1864 KB Output is correct
93 Correct 3 ms 1744 KB Output is correct
94 Correct 3 ms 1756 KB Output is correct
95 Correct 5 ms 1744 KB Output is correct
96 Correct 6 ms 1744 KB Output is correct
97 Correct 1 ms 1744 KB Output is correct