oj.uz

Submission #390482

# Submission time Handle Problem Language Result Execution time Memory
390482 2021-04-16T07:03:30 Z alireza_kaviani The Big Prize (IOI17_prize) C++11
100 / 100
 73 ms 1996 KB 
#include <bits/stdc++.h>
#include "prize.h"
using namespace std;

typedef pair<int, int> pii;

#define X		first
#define Y		second

const int MAXN = 2e5 + 10;

int cnt , mx;
pii res[MAXN];

pii get(int x){
	if(res[x].X != -1)	return res[x];
	vector<int> vec = ask(x);
	res[x] = {vec[0] , vec[1]};
	return res[x];
}

int solve(int l , int r){
	pii cur = get(r - 1);
	if(cur.X + cur.Y == mx && cur.X <= cnt)	return -1;
	if(r - l == 1){
		cnt++;
		if(cur.X + cur.Y == 0)	return l;
		return -1;
	}
	int mid = l + r >> 1;
	int ans = solve(l , mid);
	if(ans == -1)	return solve(mid , r);
	return ans;
}

void find_mx(int n){
	int cnt = 530;
	queue<pii> q;
	q.push({0 , n});
	while(!q.empty()){
		int l = q.front().X , r = q.front().Y; q.pop();
		if(res[r - 1].X == -1)	cnt--;
		mx = max(mx , get(r - 1).X + get(r - 1).Y);
		if(cnt == 0)	break;
		if(r - l == 1)	continue;
		int mid = l + r >> 1; 
		q.push({l , mid});
		q.push({mid , r});
	}
}

int find_best(int n) {
	fill(res , res + MAXN , pii(-1 , -1));
	find_mx(n);
	return solve(0 , n);
}

Compilation message

prize.cpp: In function 'int solve(int, int)':
prize.cpp:30:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   30 |  int mid = l + r >> 1;
      |            ~~^~~
prize.cpp: In function 'void find_mx(int)':
prize.cpp:46:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   46 |   int mid = l + r >> 1;
      |             ~~^~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 1832 KB Output is correct
2 Correct 8 ms 1860 KB Output is correct
3 Correct 4 ms 1864 KB Output is correct
4 Correct 8 ms 1832 KB Output is correct
5 Correct 9 ms 1836 KB Output is correct
6 Correct 6 ms 1864 KB Output is correct
7 Correct 8 ms 1924 KB Output is correct
8 Correct 9 ms 1864 KB Output is correct
9 Correct 4 ms 1900 KB Output is correct
10 Correct 7 ms 1864 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 1864 KB Output is correct
2 Correct 7 ms 1828 KB Output is correct
3 Correct 8 ms 1864 KB Output is correct
4 Correct 8 ms 1832 KB Output is correct
5 Correct 4 ms 1900 KB Output is correct
6 Correct 7 ms 1828 KB Output is correct
7 Correct 4 ms 1860 KB Output is correct
8 Correct 4 ms 1864 KB Output is correct
9 Correct 6 ms 1736 KB Output is correct
10 Correct 11 ms 1864 KB Output is correct
11 Correct 5 ms 1852 KB Output is correct
12 Correct 9 ms 1828 KB Output is correct
13 Correct 5 ms 1892 KB Output is correct
14 Correct 9 ms 1864 KB Output is correct
15 Correct 18 ms 1864 KB Output is correct
16 Correct 28 ms 1808 KB Output is correct
17 Correct 7 ms 1736 KB Output is correct
18 Correct 40 ms 1828 KB Output is correct
19 Correct 4 ms 1856 KB Output is correct
20 Correct 18 ms 1864 KB Output is correct
21 Correct 19 ms 1836 KB Output is correct
22 Correct 11 ms 1812 KB Output is correct
23 Correct 6 ms 1820 KB Output is correct
24 Correct 9 ms 1728 KB Output is correct
25 Correct 27 ms 1972 KB Output is correct
26 Correct 33 ms 1864 KB Output is correct
27 Correct 7 ms 1824 KB Output is correct
28 Correct 33 ms 1824 KB Output is correct
29 Correct 35 ms 1820 KB Output is correct
30 Correct 73 ms 1728 KB Output is correct
31 Correct 5 ms 1832 KB Output is correct
32 Correct 10 ms 1728 KB Output is correct
33 Correct 3 ms 1736 KB Output is correct
34 Correct 10 ms 1860 KB Output is correct
35 Correct 16 ms 1864 KB Output is correct
36 Correct 8 ms 1848 KB Output is correct
37 Correct 10 ms 1864 KB Output is correct
38 Correct 8 ms 1812 KB Output is correct
39 Correct 13 ms 1892 KB Output is correct
40 Correct 36 ms 1728 KB Output is correct
41 Correct 34 ms 1864 KB Output is correct
42 Correct 15 ms 1892 KB Output is correct
43 Correct 35 ms 1864 KB Output is correct
44 Correct 29 ms 1864 KB Output is correct
45 Correct 23 ms 1864 KB Output is correct
46 Correct 4 ms 1896 KB Output is correct
47 Correct 23 ms 1728 KB Output is correct
48 Correct 17 ms 1900 KB Output is correct
49 Correct 10 ms 1728 KB Output is correct
50 Correct 54 ms 1864 KB Output is correct
51 Correct 27 ms 1828 KB Output is correct
52 Correct 7 ms 1832 KB Output is correct
53 Correct 6 ms 1832 KB Output is correct
54 Correct 26 ms 1824 KB Output is correct
55 Correct 4 ms 1892 KB Output is correct
56 Correct 57 ms 1836 KB Output is correct
57 Correct 45 ms 1748 KB Output is correct
58 Correct 31 ms 1860 KB Output is correct
59 Correct 27 ms 1820 KB Output is correct
60 Correct 18 ms 1828 KB Output is correct
61 Correct 8 ms 1864 KB Output is correct
62 Correct 6 ms 1832 KB Output is correct
63 Correct 9 ms 1728 KB Output is correct
64 Correct 9 ms 1824 KB Output is correct
65 Correct 7 ms 1860 KB Output is correct
66 Correct 12 ms 1736 KB Output is correct
67 Correct 8 ms 1864 KB Output is correct
68 Correct 17 ms 1828 KB Output is correct
69 Correct 6 ms 1860 KB Output is correct
70 Correct 7 ms 1952 KB Output is correct
71 Correct 53 ms 1864 KB Output is correct
72 Correct 11 ms 1864 KB Output is correct
73 Correct 33 ms 1864 KB Output is correct
74 Correct 61 ms 1864 KB Output is correct
75 Correct 9 ms 1868 KB Output is correct
76 Correct 37 ms 1864 KB Output is correct
77 Correct 50 ms 1864 KB Output is correct
78 Correct 12 ms 1828 KB Output is correct
79 Correct 39 ms 1864 KB Output is correct
80 Correct 41 ms 1864 KB Output is correct
81 Correct 23 ms 1864 KB Output is correct
82 Correct 43 ms 1864 KB Output is correct
83 Correct 4 ms 1900 KB Output is correct
84 Correct 41 ms 1864 KB Output is correct
85 Correct 55 ms 1900 KB Output is correct
86 Correct 39 ms 1920 KB Output is correct
87 Correct 10 ms 1996 KB Output is correct
88 Correct 55 ms 1864 KB Output is correct
89 Correct 58 ms 1864 KB Output is correct
90 Correct 8 ms 1864 KB Output is correct
91 Correct 19 ms 1860 KB Output is correct
92 Correct 39 ms 1864 KB Output is correct
93 Correct 61 ms 1864 KB Output is correct
94 Correct 54 ms 1864 KB Output is correct
95 Correct 45 ms 1864 KB Output is correct
96 Correct 55 ms 1864 KB Output is correct
97 Correct 35 ms 1864 KB Output is correct