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Submission #282430

# Submission time Handle Problem Language Result Execution time Memory
282430 2020-08-24T12:22:39 Z Noam13 The Big Prize (IOI17_prize) C++14
100 / 100
 63 ms 1132 KB 
#include <bits/stdc++.h>
#include "prize.h"
#define vi vector<int>
#define vvi vector<vi>
#define vb vector<bool>
#define vvb vector<vb>
#define ii pair<int, int>
#define x first
#define y second
#define vii vector<ii>
#define pb push_back
#define all(x) x.begin(), x.end()
#define loop(i,s,e) for(int i=s;i<e;++i)
#define chkmax(a,b) a = max(a,b)
#define chkmin(a,b) a = min(a,b)
using namespace std;

map<int, ii> qur;
int cnt = 0, maxcnt = 9999;
ii myask(int i){
	//cout<<"QUR: "<<i<<endl;
	if (qur.find(i)!=qur.end()) return qur[i];
	if (cnt++==maxcnt) loop(j,0,1) j--;
	vi res = ask(i);
	return qur[i] = {res[0], res[1]};
}
int mrand(){
	return rand() ^ (rand()<<14);
}
int find_best(int n) {
	cnt = 0; qur.clear();
	int worst = 0;
	set<int> ss; //free querys
	loop(i,0,480){
		int ind = abs(mrand())%n;
		ii res = myask(ind);
		chkmax(worst, res.x+res.y);
		if (res.x+res.y==0) return ind;
		ss.insert(ind);
	}
	loop(i,0,n){
		ii res = myask(i);
		if (res.x+res.y!=worst){
			if (res.x+res.y==0) return i;
			continue;
		}
		int l = i+1, r = n, mid, ans=-1;
		while(l<r){
			mid = (l+r) / 2;
			auto it = ss.lower_bound(l);
			if (it!=ss.end() && *it<r) mid = *it;
			else ss.insert(mid);
			//cout<<"HI: "<<i<<" "<<mid<<endl;
			ii tmp = myask(mid);
			if (tmp.x+tmp.y==0) return mid;
			if (tmp.x+tmp.y!=worst) ans = mid, r = mid;
			else{
				if (tmp.x > res.x) r = mid;
				else l = mid + 1;
			}
		}
		if (ans==-1) break;
		//cout<<"I: "<<i<<" "<<ans<<endl;
		i = ans;
	}
	return 0;
}
/*
clear
g++ prize.cpp grader.cpp -o a ; ./a
8
3 2 3 3 3 2 3 1
*/

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 6 ms 384 KB Output is correct
3 Correct 6 ms 384 KB Output is correct
4 Correct 6 ms 504 KB Output is correct
5 Correct 7 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 508 KB Output is correct
10 Correct 6 ms 384 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 400 KB Output is correct
2 Correct 7 ms 384 KB Output is correct
3 Correct 6 ms 384 KB Output is correct
4 Correct 5 ms 380 KB Output is correct
5 Correct 4 ms 396 KB Output is correct
6 Correct 7 ms 384 KB Output is correct
7 Correct 6 ms 512 KB Output is correct
8 Correct 6 ms 384 KB Output is correct
9 Correct 6 ms 384 KB Output is correct
10 Correct 7 ms 384 KB Output is correct
11 Correct 6 ms 520 KB Output is correct
12 Correct 6 ms 384 KB Output is correct
13 Correct 9 ms 384 KB Output is correct
14 Correct 8 ms 384 KB Output is correct
15 Correct 12 ms 388 KB Output is correct
16 Correct 51 ms 764 KB Output is correct
17 Correct 7 ms 384 KB Output is correct
18 Correct 52 ms 760 KB Output is correct
19 Correct 7 ms 512 KB Output is correct
20 Correct 16 ms 484 KB Output is correct
21 Correct 22 ms 484 KB Output is correct
22 Correct 8 ms 364 KB Output is correct
23 Correct 6 ms 384 KB Output is correct
24 Correct 6 ms 384 KB Output is correct
25 Correct 27 ms 632 KB Output is correct
26 Correct 16 ms 640 KB Output is correct
27 Correct 8 ms 384 KB Output is correct
28 Correct 26 ms 836 KB Output is correct
29 Correct 36 ms 632 KB Output is correct
30 Correct 42 ms 996 KB Output is correct
31 Correct 3 ms 408 KB Output is correct
32 Correct 5 ms 440 KB Output is correct
33 Correct 1 ms 256 KB Output is correct
34 Correct 23 ms 528 KB Output is correct
35 Correct 7 ms 376 KB Output is correct
36 Correct 19 ms 504 KB Output is correct
37 Correct 4 ms 440 KB Output is correct
38 Correct 3 ms 412 KB Output is correct
39 Correct 34 ms 640 KB Output is correct
40 Correct 44 ms 760 KB Output is correct
41 Correct 30 ms 632 KB Output is correct
42 Correct 31 ms 632 KB Output is correct
43 Correct 28 ms 756 KB Output is correct
44 Correct 33 ms 504 KB Output is correct
45 Correct 16 ms 668 KB Output is correct
46 Correct 7 ms 376 KB Output is correct
47 Correct 25 ms 504 KB Output is correct
48 Correct 43 ms 632 KB Output is correct
49 Correct 10 ms 376 KB Output is correct
50 Correct 48 ms 760 KB Output is correct
51 Correct 22 ms 504 KB Output is correct
52 Correct 3 ms 412 KB Output is correct
53 Correct 6 ms 384 KB Output is correct
54 Correct 22 ms 504 KB Output is correct
55 Correct 6 ms 384 KB Output is correct
56 Correct 49 ms 892 KB Output is correct
57 Correct 36 ms 632 KB Output is correct
58 Correct 22 ms 764 KB Output is correct
59 Correct 38 ms 632 KB Output is correct
60 Correct 31 ms 612 KB Output is correct
61 Correct 5 ms 384 KB Output is correct
62 Correct 5 ms 376 KB Output is correct
63 Correct 7 ms 384 KB Output is correct
64 Correct 6 ms 384 KB Output is correct
65 Correct 6 ms 384 KB Output is correct
66 Correct 9 ms 384 KB Output is correct
67 Correct 6 ms 384 KB Output is correct
68 Correct 10 ms 384 KB Output is correct
69 Correct 6 ms 424 KB Output is correct
70 Correct 6 ms 376 KB Output is correct
71 Correct 49 ms 856 KB Output is correct
72 Correct 10 ms 384 KB Output is correct
73 Correct 63 ms 888 KB Output is correct
74 Correct 50 ms 888 KB Output is correct
75 Correct 5 ms 384 KB Output is correct
76 Correct 52 ms 760 KB Output is correct
77 Correct 52 ms 888 KB Output is correct
78 Correct 9 ms 384 KB Output is correct
79 Correct 27 ms 632 KB Output is correct
80 Correct 56 ms 1016 KB Output is correct
81 Correct 46 ms 888 KB Output is correct
82 Correct 53 ms 788 KB Output is correct
83 Correct 7 ms 384 KB Output is correct
84 Correct 43 ms 760 KB Output is correct
85 Correct 50 ms 888 KB Output is correct
86 Correct 37 ms 632 KB Output is correct
87 Correct 6 ms 384 KB Output is correct
88 Correct 37 ms 764 KB Output is correct
89 Correct 27 ms 632 KB Output is correct
90 Correct 5 ms 384 KB Output is correct
91 Correct 14 ms 516 KB Output is correct
92 Correct 31 ms 632 KB Output is correct
93 Correct 48 ms 760 KB Output is correct
94 Correct 34 ms 1132 KB Output is correct
95 Correct 55 ms 760 KB Output is correct
96 Correct 55 ms 760 KB Output is correct
97 Correct 46 ms 760 KB Output is correct