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Submission #70318

# Submission time Handle Problem Language Result Execution time Memory
70318 2018-08-22T15:13:30 Z gnoor The Big Prize (IOI17_prize) C++17
100 / 100
 69 ms 2116 KB 
#include "prize.h"

#include <vector>
#include <algorithm>
#include <cstring>

using namespace std;

int lft[200100];
int rgt[200100];

int _ask(int x) {
	if (lft[x]!=-1) return lft[x]+rgt[x];
	auto res = ask(x);
	lft[x]=res[0];
	rgt[x]=res[1];
	return lft[x]+rgt[x];
}

int mx=-1;

int ans=-1;

bool solve(int l,int r,int sl,int sr) {
	int m=(l+r)>>1;
	int res;
	while (m<=r) {
		res=_ask(m);
		if (res==0) {
			ans=m;
			return false;
		}
		if (res>mx) {
			mx=res;
			return false;
		}
		if (res==mx) break;
		m++;
	}
	if (m>r) {
		//not found
		m=(l+r)>>1;
		m--;
		while (m>=l) {
			res=_ask(m);
			if (res==0) {
				ans=m;
				return false;
			}
			if (res>mx) {
				mx=res;
				return false;
			}
			if (res==mx) break;
			m--;
		}
		if (m<l) {
			//not found
			return true;
		}
	}
	//normal
	int ll=lft[m]-sl;
	int rr=rgt[m]-sr;
	if (ll) if (!solve(l,m-1,sl,rgt[m])) return false;
	if (rr) if (!solve(m+1,r,lft[m],sr)) return false;
	return true;
}

int find_best(int n) {
	memset(lft,-1,sizeof(lft));
	memset(rgt,-1,sizeof(rgt));

	while (ans==-1) {
		solve(0,n-1,0,0);
	}
	return ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1784 KB Output is correct
2 Correct 5 ms 1972 KB Output is correct
3 Correct 4 ms 1972 KB Output is correct
4 Correct 4 ms 1972 KB Output is correct
5 Correct 4 ms 1972 KB Output is correct
6 Correct 4 ms 1972 KB Output is correct
7 Correct 3 ms 1972 KB Output is correct
8 Correct 5 ms 2084 KB Output is correct
9 Correct 3 ms 2084 KB Output is correct
10 Correct 6 ms 2084 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 2084 KB Output is correct
2 Correct 5 ms 2084 KB Output is correct
3 Correct 4 ms 2084 KB Output is correct
4 Correct 4 ms 2084 KB Output is correct
5 Correct 5 ms 2084 KB Output is correct
6 Correct 4 ms 2092 KB Output is correct
7 Correct 5 ms 2096 KB Output is correct
8 Correct 4 ms 2100 KB Output is correct
9 Correct 3 ms 2108 KB Output is correct
10 Correct 3 ms 2108 KB Output is correct
11 Correct 7 ms 2108 KB Output is correct
12 Correct 6 ms 2108 KB Output is correct
13 Correct 6 ms 2108 KB Output is correct
14 Correct 5 ms 2108 KB Output is correct
15 Correct 13 ms 2108 KB Output is correct
16 Correct 24 ms 2108 KB Output is correct
17 Correct 4 ms 2108 KB Output is correct
18 Correct 41 ms 2108 KB Output is correct
19 Correct 4 ms 2108 KB Output is correct
20 Correct 14 ms 2108 KB Output is correct
21 Correct 28 ms 2108 KB Output is correct
22 Correct 7 ms 2108 KB Output is correct
23 Correct 4 ms 2108 KB Output is correct
24 Correct 4 ms 2108 KB Output is correct
25 Correct 28 ms 2108 KB Output is correct
26 Correct 23 ms 2108 KB Output is correct
27 Correct 5 ms 2108 KB Output is correct
28 Correct 25 ms 2108 KB Output is correct
29 Correct 41 ms 2108 KB Output is correct
30 Correct 28 ms 2108 KB Output is correct
31 Correct 5 ms 2108 KB Output is correct
32 Correct 6 ms 2108 KB Output is correct
33 Correct 4 ms 2108 KB Output is correct
34 Correct 20 ms 2108 KB Output is correct
35 Correct 5 ms 2108 KB Output is correct
36 Correct 20 ms 2108 KB Output is correct
37 Correct 7 ms 2108 KB Output is correct
38 Correct 4 ms 2108 KB Output is correct
39 Correct 12 ms 2108 KB Output is correct
40 Correct 56 ms 2108 KB Output is correct
41 Correct 27 ms 2108 KB Output is correct
42 Correct 30 ms 2108 KB Output is correct
43 Correct 28 ms 2108 KB Output is correct
44 Correct 30 ms 2108 KB Output is correct
45 Correct 24 ms 2108 KB Output is correct
46 Correct 5 ms 2108 KB Output is correct
47 Correct 23 ms 2108 KB Output is correct
48 Correct 32 ms 2108 KB Output is correct
49 Correct 7 ms 2108 KB Output is correct
50 Correct 59 ms 2108 KB Output is correct
51 Correct 28 ms 2108 KB Output is correct
52 Correct 5 ms 2108 KB Output is correct
53 Correct 6 ms 2108 KB Output is correct
54 Correct 13 ms 2108 KB Output is correct
55 Correct 4 ms 2108 KB Output is correct
56 Correct 62 ms 2108 KB Output is correct
57 Correct 28 ms 2108 KB Output is correct
58 Correct 16 ms 2108 KB Output is correct
59 Correct 41 ms 2108 KB Output is correct
60 Correct 31 ms 2108 KB Output is correct
61 Correct 7 ms 2112 KB Output is correct
62 Correct 3 ms 2112 KB Output is correct
63 Correct 4 ms 2112 KB Output is correct
64 Correct 6 ms 2112 KB Output is correct
65 Correct 5 ms 2112 KB Output is correct
66 Correct 5 ms 2112 KB Output is correct
67 Correct 9 ms 2112 KB Output is correct
68 Correct 4 ms 2112 KB Output is correct
69 Correct 7 ms 2112 KB Output is correct
70 Correct 8 ms 2112 KB Output is correct
71 Correct 69 ms 2112 KB Output is correct
72 Correct 7 ms 2112 KB Output is correct
73 Correct 57 ms 2112 KB Output is correct
74 Correct 39 ms 2112 KB Output is correct
75 Correct 6 ms 2112 KB Output is correct
76 Correct 55 ms 2112 KB Output is correct
77 Correct 60 ms 2112 KB Output is correct
78 Correct 9 ms 2112 KB Output is correct
79 Correct 35 ms 2112 KB Output is correct
80 Correct 63 ms 2112 KB Output is correct
81 Correct 55 ms 2112 KB Output is correct
82 Correct 55 ms 2112 KB Output is correct
83 Correct 4 ms 2112 KB Output is correct
84 Correct 54 ms 2112 KB Output is correct
85 Correct 41 ms 2112 KB Output is correct
86 Correct 10 ms 2112 KB Output is correct
87 Correct 5 ms 2112 KB Output is correct
88 Correct 15 ms 2112 KB Output is correct
89 Correct 12 ms 2112 KB Output is correct
90 Correct 3 ms 2112 KB Output is correct
91 Correct 9 ms 2112 KB Output is correct
92 Correct 18 ms 2116 KB Output is correct
93 Correct 6 ms 2116 KB Output is correct
94 Correct 6 ms 2116 KB Output is correct
95 Correct 5 ms 2116 KB Output is correct
96 Correct 6 ms 2116 KB Output is correct
97 Correct 3 ms 2116 KB Output is correct