Submission #39397

# Submission time Handle Problem Language Result Execution time Memory
39397 2018-01-13T18:57:17 Z mohammad_kilani The Big Prize (IOI17_prize) C++14
95.13 / 100
49 ms 7224 KB
#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 200010;
#define oo 2000000000
bool asked[N];
vector<int> answer[N] , v;
vector< pair<int,int> > v2;
int mx = 0 ;

vector<int> get(int i){
	if(asked[i])
		return answer[i];
	asked[i] = true;
	answer[i] = ask(i);
	if(answer[i][0] + answer[i][1] == mx) v2.push_back(make_pair(answer[i][0],i)); else v.push_back(i);
	return answer[i];
}

int solve(int s,int e){
	int res = e;
	vector<int> v1 = get(s);
	while(e >= s){
		int mid = (s + e) / 2;
		vector<int> cur = get(mid);
		if(cur[0] + cur[1] == mx && cur[0] == v1[0])
			s = mid + 1;
		else {
			res = mid;
			e = mid - 1;
		}
	}
	return res;
}

int find_best(int n) {
	srand(time(0));
	int num = min(n,480);
	for(int i=0;i<num;i++){
		vector<int> res = get(i);
		int cur = res[0] + res[1];
		mx = max(mx,cur);
	}
	int low = 0;
	while(true){
		int high = n - 1;
		vector<int> cur = get(low);
		if(cur[0] + cur[1] == 0) return low;
		if(cur[0] + cur[1] != mx){
			low++;
			continue;
		}
		for(int i=0;i<v2.size();i++){
			if(v2[i].second >= low && v2[i].first != cur[0]){
				high = min(high,v2[i].second);
			}
			else if(v2[i].second >= low){
				low = max(low,v2[i].second);
			}
		}
		bool flag = false;
		for(int i=0;i<v.size();i++){
			if(v[i] > low){
				vector<int> tmp = get(v[i]-1);
				if(tmp[0] == cur[0]){
					low = v[i];
					flag = true;
					break;
				}
				high = min(high,v[i]);
			}
		}
		if(flag) continue;
		low = solve(low,high);
	}
	return 0;
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:53:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<v2.size();i++){
                ^
prize.cpp:62:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<v.size();i++){
                ^
# Verdict Execution time Memory Grader output
1 Correct 6 ms 6904 KB Output is correct
2 Correct 3 ms 6904 KB Output is correct
3 Correct 6 ms 6904 KB Output is correct
4 Correct 3 ms 6904 KB Output is correct
5 Correct 0 ms 6904 KB Output is correct
6 Correct 0 ms 6904 KB Output is correct
7 Correct 6 ms 6904 KB Output is correct
8 Correct 0 ms 6904 KB Output is correct
9 Correct 0 ms 6904 KB Output is correct
10 Correct 0 ms 6904 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 6 ms 6904 KB Output is correct
2 Correct 6 ms 6904 KB Output is correct
3 Correct 3 ms 6904 KB Output is correct
4 Correct 3 ms 6904 KB Output is correct
5 Correct 0 ms 6904 KB Output is correct
6 Correct 6 ms 6904 KB Output is correct
7 Correct 0 ms 6904 KB Output is correct
8 Correct 3 ms 6904 KB Output is correct
9 Correct 3 ms 6904 KB Output is correct
10 Correct 0 ms 6904 KB Output is correct
11 Correct 0 ms 6904 KB Output is correct
12 Correct 0 ms 6904 KB Output is correct
13 Correct 0 ms 6904 KB Output is correct
14 Correct 0 ms 6904 KB Output is correct
15 Correct 13 ms 7044 KB Output is correct
16 Correct 19 ms 7224 KB Output is correct
17 Correct 3 ms 6904 KB Output is correct
18 Partially correct 19 ms 7224 KB Partially correct - number of queries: 5398
19 Correct 0 ms 6904 KB Output is correct
20 Correct 6 ms 7044 KB Output is correct
21 Correct 3 ms 7044 KB Output is correct
22 Correct 13 ms 6904 KB Output is correct
23 Correct 9 ms 6904 KB Output is correct
24 Correct 3 ms 6904 KB Output is correct
25 Correct 23 ms 7044 KB Output is correct
26 Correct 33 ms 7044 KB Output is correct
27 Correct 0 ms 6904 KB Output is correct
28 Correct 23 ms 7224 KB Output is correct
29 Correct 23 ms 7044 KB Output is correct
30 Partially correct 49 ms 7224 KB Partially correct - number of queries: 5361
31 Correct 3 ms 6904 KB Output is correct
32 Correct 9 ms 6904 KB Output is correct
33 Correct 0 ms 6904 KB Output is correct
34 Correct 19 ms 7044 KB Output is correct
35 Correct 3 ms 6904 KB Output is correct
36 Correct 0 ms 7044 KB Output is correct
37 Correct 6 ms 6904 KB Output is correct
38 Correct 6 ms 6904 KB Output is correct
39 Correct 6 ms 7044 KB Output is correct
40 Correct 9 ms 7224 KB Output is correct
41 Correct 19 ms 7044 KB Output is correct
42 Correct 16 ms 7044 KB Output is correct
43 Correct 26 ms 7044 KB Output is correct
44 Correct 9 ms 7044 KB Output is correct
45 Correct 13 ms 7044 KB Output is correct
46 Correct 0 ms 6904 KB Output is correct
47 Correct 6 ms 7044 KB Output is correct
48 Correct 13 ms 7044 KB Output is correct
49 Correct 6 ms 6904 KB Output is correct
50 Partially correct 29 ms 7224 KB Partially correct - number of queries: 5396
51 Correct 6 ms 7044 KB Output is correct
52 Correct 9 ms 6904 KB Output is correct
53 Correct 6 ms 6904 KB Output is correct
54 Correct 13 ms 7044 KB Output is correct
55 Correct 3 ms 6904 KB Output is correct
56 Partially correct 23 ms 7224 KB Partially correct - number of queries: 5414
57 Correct 9 ms 7044 KB Output is correct
58 Correct 19 ms 7044 KB Output is correct
59 Correct 6 ms 7044 KB Output is correct
60 Correct 13 ms 7044 KB Output is correct
61 Correct 3 ms 6904 KB Output is correct
62 Correct 6 ms 6904 KB Output is correct
63 Correct 3 ms 6904 KB Output is correct
64 Correct 6 ms 6904 KB Output is correct
65 Correct 0 ms 6904 KB Output is correct
66 Correct 6 ms 6904 KB Output is correct
67 Correct 6 ms 6904 KB Output is correct
68 Correct 0 ms 6904 KB Output is correct
69 Correct 9 ms 6904 KB Output is correct
70 Correct 3 ms 6904 KB Output is correct
71 Partially correct 23 ms 7224 KB Partially correct - number of queries: 5239
72 Correct 6 ms 6904 KB Output is correct
73 Partially correct 16 ms 7224 KB Partially correct - number of queries: 5176
74 Partially correct 33 ms 7224 KB Partially correct - number of queries: 5203
75 Correct 0 ms 6904 KB Output is correct
76 Correct 16 ms 7224 KB Output is correct
77 Partially correct 16 ms 7224 KB Partially correct - number of queries: 5487
78 Correct 6 ms 6904 KB Output is correct
79 Correct 16 ms 7044 KB Output is correct
80 Partially correct 19 ms 7224 KB Partially correct - number of queries: 5476
81 Partially correct 23 ms 7224 KB Partially correct - number of queries: 5471
82 Partially correct 23 ms 7224 KB Partially correct - number of queries: 5443
83 Correct 3 ms 6904 KB Output is correct
84 Correct 23 ms 7224 KB Output is correct
85 Partially correct 33 ms 7224 KB Partially correct - number of queries: 5457
86 Correct 6 ms 6904 KB Output is correct
87 Correct 0 ms 6904 KB Output is correct
88 Correct 0 ms 6904 KB Output is correct
89 Correct 6 ms 6904 KB Output is correct
90 Correct 0 ms 6904 KB Output is correct
91 Correct 9 ms 6904 KB Output is correct
92 Correct 0 ms 6904 KB Output is correct
93 Correct 6 ms 6904 KB Output is correct
94 Correct 9 ms 6904 KB Output is correct
95 Correct 9 ms 6904 KB Output is correct
96 Correct 9 ms 6904 KB Output is correct
97 Correct 0 ms 6904 KB Output is correct