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답안 #705766

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
705766 2023-03-05T07:10:24 Z Abrar_Al_Samit 커다란 상품 (IOI17_prize) C++17
100 / 100
 71 ms 11344 KB 
#include<bits/stdc++.h>
#include "prize.h"
using namespace std;
 
const int nax = 2e5 + 1;
vector<vector<int>>mem(nax, vector<int>(2, -1));

vector<int>ASK(int i) {
	if(mem[i][0]==-1) {
		mem[i] = ask(i);
	}
	return mem[i];
}
int find_best(int n) {
 
	int sq = min(n, 500);
	int mx = -1, id;
 
	int cnt = 0;
 
	auto up = [&] () {
		++cnt;
		if(cnt>10000) assert(false);
	};
	vector<int>prv;
	for(int i=0; i<sq; ++i) {
		up();
		auto v = ASK(i);
		if(v[0]+v[1]==0) {
			return i;
		}
		if(v[0]+v[1]>mx) {
			mx = v[0] + v[1];
			id = i;
			prv = v;

			if(mx*mx>n) break;
		}
	}
 
	while(id<n-1) {
		int to = min(n-1, id+sq);
		up();
		auto cr = ASK(to);
		if(cr[0]==prv[0] && cr[1]==prv[1]) {
			id = to;
			continue;
		}
		int l = 0, r = to-id;
		while(l<r) {
			int mid = (l+r+1)/2;
			up();
			cr = ASK(id+mid);
			if(cr[0]==prv[0] && cr[1]==prv[1]) {
				l = mid;
			} else {
				r = mid-1;
			}
		
		}
		id += l+1;
		while(id<n) {
			up();
			cr = ASK(id);
			if(cr[0]+cr[1]==0) {
				return id;
			}
			if(cr[0]+cr[1]==mx) {
				prv = cr;
				break;
			}
			++id;
		}
	}
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:25:13: warning: control reaches end of non-void function [-Wreturn-type]
   25 |  vector<int>prv;
      |             ^~~
prize.cpp:42:23: warning: 'id' may be used uninitialized in this function [-Wmaybe-uninitialized]
   42 |   int to = min(n-1, id+sq);
      |                     ~~^~~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 11216 KB Output is correct
2 Correct 19 ms 11268 KB Output is correct
3 Correct 13 ms 11216 KB Output is correct
4 Correct 15 ms 11216 KB Output is correct
5 Correct 17 ms 11264 KB Output is correct
6 Correct 11 ms 11180 KB Output is correct
7 Correct 16 ms 11340 KB Output is correct
8 Correct 17 ms 11268 KB Output is correct
9 Correct 17 ms 11168 KB Output is correct
10 Correct 19 ms 11184 KB Output is correct

Subtask #2
80.0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 11264 KB Output is correct
2 Correct 16 ms 11264 KB Output is correct
3 Correct 20 ms 11216 KB Output is correct
4 Correct 19 ms 11260 KB Output is correct
5 Correct 13 ms 11344 KB Output is correct
6 Correct 10 ms 11216 KB Output is correct
7 Correct 13 ms 11216 KB Output is correct
8 Correct 15 ms 11216 KB Output is correct
9 Correct 14 ms 11216 KB Output is correct
10 Correct 26 ms 11224 KB Output is correct
11 Correct 20 ms 11264 KB Output is correct
12 Correct 14 ms 11260 KB Output is correct
13 Correct 19 ms 11216 KB Output is correct
14 Correct 16 ms 11216 KB Output is correct
15 Correct 20 ms 11264 KB Output is correct
16 Correct 47 ms 11260 KB Output is correct
17 Correct 11 ms 11228 KB Output is correct
18 Correct 47 ms 11216 KB Output is correct
19 Correct 12 ms 11268 KB Output is correct
20 Correct 18 ms 11216 KB Output is correct
21 Correct 26 ms 11260 KB Output is correct
22 Correct 20 ms 11244 KB Output is correct
23 Correct 16 ms 11240 KB Output is correct
24 Correct 14 ms 11216 KB Output is correct
25 Correct 37 ms 11216 KB Output is correct
26 Correct 30 ms 11216 KB Output is correct
27 Correct 16 ms 11152 KB Output is correct
28 Correct 71 ms 11216 KB Output is correct
29 Correct 45 ms 11216 KB Output is correct
30 Correct 48 ms 11216 KB Output is correct
31 Correct 12 ms 11216 KB Output is correct
32 Correct 17 ms 11272 KB Output is correct
33 Correct 10 ms 11216 KB Output is correct
34 Correct 17 ms 11248 KB Output is correct
35 Correct 14 ms 11344 KB Output is correct
36 Correct 20 ms 11216 KB Output is correct
37 Correct 20 ms 11268 KB Output is correct
38 Correct 14 ms 11264 KB Output is correct
39 Correct 19 ms 11264 KB Output is correct
40 Correct 29 ms 11264 KB Output is correct
41 Correct 41 ms 11160 KB Output is correct
42 Correct 24 ms 11344 KB Output is correct
43 Correct 33 ms 11248 KB Output is correct
44 Correct 24 ms 11216 KB Output is correct
45 Correct 23 ms 11216 KB Output is correct
46 Correct 15 ms 11216 KB Output is correct
47 Correct 20 ms 11240 KB Output is correct
48 Correct 44 ms 11244 KB Output is correct
49 Correct 12 ms 11216 KB Output is correct
50 Correct 45 ms 11344 KB Output is correct
51 Correct 30 ms 11260 KB Output is correct
52 Correct 12 ms 11344 KB Output is correct
53 Correct 20 ms 11264 KB Output is correct
54 Correct 26 ms 11264 KB Output is correct
55 Correct 11 ms 11216 KB Output is correct
56 Correct 46 ms 11276 KB Output is correct
57 Correct 45 ms 11268 KB Output is correct
58 Correct 49 ms 11264 KB Output is correct
59 Correct 32 ms 11268 KB Output is correct
60 Correct 29 ms 11216 KB Output is correct
61 Correct 17 ms 11264 KB Output is correct
62 Correct 13 ms 11216 KB Output is correct
63 Correct 19 ms 11240 KB Output is correct
64 Correct 14 ms 11216 KB Output is correct
65 Correct 18 ms 11260 KB Output is correct
66 Correct 25 ms 11200 KB Output is correct
67 Correct 18 ms 11164 KB Output is correct
68 Correct 15 ms 11216 KB Output is correct
69 Correct 19 ms 11216 KB Output is correct
70 Correct 14 ms 11344 KB Output is correct
71 Correct 62 ms 11216 KB Output is correct
72 Correct 26 ms 11216 KB Output is correct
73 Correct 61 ms 11260 KB Output is correct
74 Correct 59 ms 11216 KB Output is correct
75 Correct 17 ms 11216 KB Output is correct
76 Correct 37 ms 11216 KB Output is correct
77 Correct 54 ms 11160 KB Output is correct
78 Correct 20 ms 11216 KB Output is correct
79 Correct 39 ms 11224 KB Output is correct
80 Correct 63 ms 11216 KB Output is correct
81 Correct 45 ms 11264 KB Output is correct
82 Correct 35 ms 11216 KB Output is correct
83 Correct 19 ms 11256 KB Output is correct
84 Correct 37 ms 11216 KB Output is correct
85 Correct 44 ms 11216 KB Output is correct
86 Correct 21 ms 11252 KB Output is correct
87 Correct 19 ms 11272 KB Output is correct
88 Correct 23 ms 11264 KB Output is correct
89 Correct 19 ms 11216 KB Output is correct
90 Correct 16 ms 11216 KB Output is correct
91 Correct 17 ms 11228 KB Output is correct
92 Correct 17 ms 11264 KB Output is correct
93 Correct 20 ms 11160 KB Output is correct
94 Correct 20 ms 11168 KB Output is correct
95 Correct 20 ms 11228 KB Output is correct
96 Correct 19 ms 11216 KB Output is correct
97 Correct 17 ms 11172 KB Output is correct