oj.uz

Submission #119653

# Submission time Handle Problem Language Result Execution time Memory
119653 2019-06-21T15:27:23 Z tjd229 The Big Prize (IOI17_prize) C++14
100 / 100
 52 ms 5240 KB 
#include "prize.h"
#include <vector>
#define pii pair<int,int>
using namespace std;
const int seg = 446;
int pre;
int nc;//1+2+3+4
int call;
vector<int> v[200000];
void my_ask(int i) {
	if (v[i].empty()) v[i] = ask(i),++call;
}
int search(int l,int r,int tgt) {
	int t = -1;
	while (l <= r) {
		int m = (l + r) >> 1;
		my_ask(m);
		if (v[m][0] + v[m][1] != nc) {
			t = m, r = m - 1;
			if (tgt == 1) return t;
		}
		else if (v[m][0] == pre) l = m + 1,tgt=v[m][0]-pre;		
		else r = m - 1;
	}
	return t;
}
int find_best(int n) {
	if (n <= 5000) {
		for (int i = 0; i < n; ++i) {
			my_ask(i);
			if (v[i][0] + v[i][1] == 0) return i;
		}
	}
	vector<pii > g;
	int i = 0, j = seg-1;
	int last = 0;
	while (i < n) {
		if (j >= n) j = n-1;
		my_ask(j);
		int s = v[j][0] + v[j][1];
		if (s == 0) return j;
		if (nc < s) nc = s;
		g.push_back({i,j});
		i += seg; j += seg;
	}
	for (i = 0; i < n && call <= 447; ++i) {
		my_ask(i);
		int s = v[i][0] + v[i][1];
		if (s == 0) return i;
		if (nc < s) nc = s;
	}
	for (;v[last].size();++last) {
		int s = v[last][0] + v[last][1];
		if (nc > s) ++pre;
	}
	for (i = 0; i < g.size();) {
		int e = g[i].second;
		if (last < g[i].first) last = g[i].first;
		if (e < last || (v[e][0]+v[e][1]==nc&&v[e][0]==pre)) {
			++i;
			continue;
		}
		int t = search(last,e,v[e][0]-pre);
		if (v[t][0] + v[t][1] == 0) return t;
		++pre;
		last = t+1;
	}
	return 0;
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:56:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (i = 0; i < g.size();) {
              ~~^~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 4992 KB Output is correct
2 Correct 10 ms 4992 KB Output is correct
3 Correct 9 ms 5112 KB Output is correct
4 Correct 10 ms 4992 KB Output is correct
5 Correct 8 ms 4992 KB Output is correct
6 Correct 11 ms 5032 KB Output is correct
7 Correct 9 ms 4992 KB Output is correct
8 Correct 9 ms 4992 KB Output is correct
9 Correct 7 ms 5136 KB Output is correct
10 Correct 10 ms 4992 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 5004 KB Output is correct
2 Correct 11 ms 4992 KB Output is correct
3 Correct 9 ms 5032 KB Output is correct
4 Correct 11 ms 5120 KB Output is correct
5 Correct 9 ms 5120 KB Output is correct
6 Correct 9 ms 5104 KB Output is correct
7 Correct 9 ms 5032 KB Output is correct
8 Correct 10 ms 5032 KB Output is correct
9 Correct 10 ms 4992 KB Output is correct
10 Correct 10 ms 5120 KB Output is correct
11 Correct 11 ms 5084 KB Output is correct
12 Correct 7 ms 5116 KB Output is correct
13 Correct 12 ms 4992 KB Output is correct
14 Correct 12 ms 5120 KB Output is correct
15 Correct 6 ms 5004 KB Output is correct
16 Correct 52 ms 5112 KB Output is correct
17 Correct 11 ms 4992 KB Output is correct
18 Correct 31 ms 5168 KB Output is correct
19 Correct 10 ms 4992 KB Output is correct
20 Correct 16 ms 5032 KB Output is correct
21 Correct 17 ms 4992 KB Output is correct
22 Correct 14 ms 4992 KB Output is correct
23 Correct 10 ms 5040 KB Output is correct
24 Correct 11 ms 4992 KB Output is correct
25 Correct 14 ms 5096 KB Output is correct
26 Correct 19 ms 4992 KB Output is correct
27 Correct 12 ms 4992 KB Output is correct
28 Correct 45 ms 5112 KB Output is correct
29 Correct 38 ms 5112 KB Output is correct
30 Correct 48 ms 5212 KB Output is correct
31 Correct 12 ms 4992 KB Output is correct
32 Correct 13 ms 5008 KB Output is correct
33 Correct 6 ms 4992 KB Output is correct
34 Correct 22 ms 5032 KB Output is correct
35 Correct 8 ms 5032 KB Output is correct
36 Correct 19 ms 5032 KB Output is correct
37 Correct 10 ms 5112 KB Output is correct
38 Correct 11 ms 4992 KB Output is correct
39 Correct 19 ms 4992 KB Output is correct
40 Correct 46 ms 5032 KB Output is correct
41 Correct 22 ms 4992 KB Output is correct
42 Correct 33 ms 4992 KB Output is correct
43 Correct 31 ms 5104 KB Output is correct
44 Correct 27 ms 5060 KB Output is correct
45 Correct 23 ms 5000 KB Output is correct
46 Correct 8 ms 4992 KB Output is correct
47 Correct 30 ms 4992 KB Output is correct
48 Correct 35 ms 5112 KB Output is correct
49 Correct 13 ms 4992 KB Output is correct
50 Correct 50 ms 5116 KB Output is correct
51 Correct 12 ms 5168 KB Output is correct
52 Correct 11 ms 5084 KB Output is correct
53 Correct 9 ms 4992 KB Output is correct
54 Correct 27 ms 5052 KB Output is correct
55 Correct 9 ms 5008 KB Output is correct
56 Correct 49 ms 5128 KB Output is correct
57 Correct 27 ms 5112 KB Output is correct
58 Correct 39 ms 5096 KB Output is correct
59 Correct 27 ms 5072 KB Output is correct
60 Correct 33 ms 5072 KB Output is correct
61 Correct 12 ms 5000 KB Output is correct
62 Correct 7 ms 5136 KB Output is correct
63 Correct 10 ms 5112 KB Output is correct
64 Correct 7 ms 5112 KB Output is correct
65 Correct 11 ms 5004 KB Output is correct
66 Correct 13 ms 5112 KB Output is correct
67 Correct 7 ms 5136 KB Output is correct
68 Correct 12 ms 5036 KB Output is correct
69 Correct 8 ms 5032 KB Output is correct
70 Correct 8 ms 4992 KB Output is correct
71 Correct 44 ms 5140 KB Output is correct
72 Correct 13 ms 4992 KB Output is correct
73 Correct 49 ms 5108 KB Output is correct
74 Correct 32 ms 5112 KB Output is correct
75 Correct 9 ms 5120 KB Output is correct
76 Correct 38 ms 5212 KB Output is correct
77 Correct 31 ms 5156 KB Output is correct
78 Correct 13 ms 5116 KB Output is correct
79 Correct 28 ms 4992 KB Output is correct
80 Correct 51 ms 5160 KB Output is correct
81 Correct 31 ms 5112 KB Output is correct
82 Correct 32 ms 5240 KB Output is correct
83 Correct 12 ms 5040 KB Output is correct
84 Correct 19 ms 5168 KB Output is correct
85 Correct 50 ms 5112 KB Output is correct
86 Correct 38 ms 5076 KB Output is correct
87 Correct 8 ms 5128 KB Output is correct
88 Correct 20 ms 5128 KB Output is correct
89 Correct 31 ms 5140 KB Output is correct
90 Correct 10 ms 5112 KB Output is correct
91 Correct 17 ms 5240 KB Output is correct
92 Correct 43 ms 5120 KB Output is correct
93 Correct 47 ms 5092 KB Output is correct
94 Correct 40 ms 5112 KB Output is correct
95 Correct 33 ms 5136 KB Output is correct
96 Correct 48 ms 5140 KB Output is correct
97 Correct 27 ms 5164 KB Output is correct