oj.uz

Submission #69911

# Submission time Handle Problem Language Result Execution time Memory
69911 2018-08-22T00:26:11 Z Diuven The Big Prize (IOI17_prize) C++14
20 / 100
 66 ms 2236 KB 
#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
const int MX=200010;

bool up[MX];
int L[MX], R[MX], sum, n, ans=-1;

void my_ask(int i){
	if(L[i]>=0) return;
	vi now=ask(i);
	L[i]=now[0], R[i]=now[1];
}

void search(int s, int e, int lc, int mc, int rc){
	if(s>e || mc<=0) return;

	int m=(s+e)/2;

	for(int i=m; i<=e; i++){
		my_ask(i);
		if(L[i]+R[i]==0){ ans=i; return; }
		if(L[i]+R[i]==sum){
			search(s,m-1, lc, L[i]-(i-m)-lc, R[i]+i-m);
			search(i+1,e, L[i], R[i]-rc, rc);
			return;
		}
	}
	for(int i=m; i>=s; i--){
		my_ask(i);
		if(L[i]+R[i]==0){ ans=i; return; }
		if(L[i]+R[i]==sum){
			search(s,i-1, lc, L[i]-lc, R[i]);
			return;
		}
	}
}

void solve(){
	int b=0;
	for(; b*b<=n; b++);
	vector<int> V;
	for(int i=0; i<min(500, n); i++){
		my_ask(i*b);
		sum=max(sum, L[i]+R[i]);
	}
	V.push_back(0);
	for(int ii=0; ii*b<n; ii++){
		for(int j=ii*b; j<min(n, ii*b+b); j++){
			my_ask(j);
			if(L[j]+R[j]==sum){
				V.push_back(j);
				break;
			}
		}
	}
	V.push_back(n);
	for(int i=0; i<(int)V.size()-1; i++){
		int s=V[i], e=V[i+1];
		my_ask(s); if(e<n) my_ask(e);
		int l=L[s], r=0;
		if(e<n) r = R[e] + (L[e]+R[e]<sum);
		search(s,e-1,l,sum-l-r,r);
	}
}

int find_best(int _n){
	n=_n;
	for(int i=0; i<n; i++) L[i]=R[i]=-1;
	solve();
	assert(ans>=0 && L[ans]==0 && R[ans]==0);
	return ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 1784 KB Output is correct
2 Correct 8 ms 1844 KB Output is correct
3 Correct 8 ms 2012 KB Output is correct
4 Correct 10 ms 2012 KB Output is correct
5 Correct 9 ms 2016 KB Output is correct
6 Correct 9 ms 2036 KB Output is correct
7 Correct 8 ms 2108 KB Output is correct
8 Correct 9 ms 2108 KB Output is correct
9 Correct 9 ms 2108 KB Output is correct
10 Correct 8 ms 2108 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 2108 KB Output is correct
2 Correct 10 ms 2112 KB Output is correct
3 Correct 10 ms 2112 KB Output is correct
4 Correct 8 ms 2112 KB Output is correct
5 Correct 7 ms 2112 KB Output is correct
6 Correct 7 ms 2112 KB Output is correct
7 Correct 9 ms 2112 KB Output is correct
8 Correct 8 ms 2112 KB Output is correct
9 Correct 9 ms 2112 KB Output is correct
10 Correct 7 ms 2112 KB Output is correct
11 Correct 15 ms 2112 KB Output is correct
12 Correct 16 ms 2112 KB Output is correct
13 Correct 8 ms 2132 KB Output is correct
14 Correct 14 ms 2132 KB Output is correct
15 Correct 19 ms 2144 KB Output is correct
16 Correct 42 ms 2144 KB Output is correct
17 Correct 43 ms 2144 KB Output is correct
18 Correct 37 ms 2144 KB Output is correct
19 Correct 35 ms 2144 KB Output is correct
20 Correct 27 ms 2144 KB Output is correct
21 Correct 55 ms 2144 KB Output is correct
22 Correct 34 ms 2144 KB Output is correct
23 Correct 8 ms 2144 KB Output is correct
24 Correct 12 ms 2144 KB Output is correct
25 Correct 19 ms 2144 KB Output is correct
26 Correct 47 ms 2144 KB Output is correct
27 Correct 9 ms 2144 KB Output is correct
28 Correct 51 ms 2144 KB Output is correct
29 Correct 16 ms 2144 KB Output is correct
30 Correct 41 ms 2144 KB Output is correct
31 Correct 38 ms 2144 KB Output is correct
32 Correct 6 ms 2144 KB Output is correct
33 Correct 2 ms 2144 KB Output is correct
34 Correct 33 ms 2144 KB Output is correct
35 Correct 7 ms 2144 KB Output is correct
36 Correct 19 ms 2144 KB Output is correct
37 Correct 9 ms 2144 KB Output is correct
38 Correct 7 ms 2144 KB Output is correct
39 Correct 19 ms 2144 KB Output is correct
40 Correct 39 ms 2144 KB Output is correct
41 Correct 40 ms 2144 KB Output is correct
42 Correct 43 ms 2144 KB Output is correct
43 Correct 51 ms 2144 KB Output is correct
44 Correct 40 ms 2144 KB Output is correct
45 Correct 66 ms 2144 KB Output is correct
46 Correct 36 ms 2212 KB Output is correct
47 Correct 39 ms 2212 KB Output is correct
48 Correct 43 ms 2212 KB Output is correct
49 Correct 38 ms 2212 KB Output is correct
50 Correct 40 ms 2212 KB Output is correct
51 Correct 43 ms 2212 KB Output is correct
52 Correct 63 ms 2212 KB Output is correct
53 Correct 13 ms 2212 KB Output is correct
54 Correct 53 ms 2236 KB Output is correct
55 Correct 49 ms 2236 KB Output is correct
56 Correct 40 ms 2236 KB Output is correct
57 Correct 49 ms 2236 KB Output is correct
58 Correct 53 ms 2236 KB Output is correct
59 Correct 28 ms 2236 KB Output is correct
60 Correct 49 ms 2236 KB Output is correct
61 Correct 7 ms 2236 KB Output is correct
62 Correct 12 ms 2236 KB Output is correct
63 Correct 9 ms 2236 KB Output is correct
64 Correct 11 ms 2236 KB Output is correct
65 Correct 9 ms 2236 KB Output is correct
66 Correct 17 ms 2236 KB Output is correct
67 Correct 10 ms 2236 KB Output is correct
68 Correct 12 ms 2236 KB Output is correct
69 Correct 8 ms 2236 KB Output is correct
70 Correct 13 ms 2236 KB Output is correct
71 Correct 37 ms 2236 KB Output is correct
72 Correct 11 ms 2236 KB Output is correct
73 Correct 56 ms 2236 KB Output is correct
74 Correct 38 ms 2236 KB Output is correct
75 Correct 10 ms 2236 KB Output is correct
76 Correct 48 ms 2236 KB Output is correct
77 Correct 51 ms 2236 KB Output is correct
78 Correct 9 ms 2236 KB Output is correct
79 Correct 27 ms 2236 KB Output is correct
80 Correct 38 ms 2236 KB Output is correct
81 Correct 30 ms 2236 KB Output is correct
82 Correct 39 ms 2236 KB Output is correct
83 Correct 8 ms 2236 KB Output is correct
84 Correct 46 ms 2236 KB Output is correct
85 Correct 43 ms 2236 KB Output is correct
86 Incorrect 56 ms 2236 KB Incorrect
87 Halted 0 ms 0 KB -