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Submission #143161

# Submission time Handle Problem Language Result Execution time Memory
143161 2019-08-13T09:21:20 Z tmwilliamlin168 The Big Prize (IOI17_prize) C++14
100 / 100
 52 ms 1240 KB 
#include "prize.h"
#include <bits/stdc++.h>
using namespace std;

const int mxN=2e5;
int n, a, ft[mxN+1];
vector<int> v;

void upd(int i) {
	for(++i; i<=n; i+=i&-i)
		++ft[i];
}

int qry(int i) {
	int r=0;
	for(; i; i-=i&-i)
		r+=ft[i];
	return r;
}

int dc(int l=0, int r=n-1, int sl=0, int sr=a) {
	if(l>r)
		return -1;
	int ml=(l+r)/2, mr=ml;
	vector<int> b;
	for(; ml>=l; --ml) {
		if(qry(r+1)-qry(l)>=sr-sl)
			return -1;
		if(qry(ml+1)-qry(ml))
			continue;
		b=ask(ml);
		int c=b[0]+b[1];
		if(!c)
			return ml;
		if(c>a) {
			a=c;
			for(int vi : v)
				upd(vi);
			v.clear();
			return dc();
		}
		if(c==a) {
			v.push_back(ml);
			b[1]=b[0]+mr-ml;
			break;
		}
		if(c<a)
			upd(ml);
	}
	if(ml<l)
		b[1]=sl+mr-ml;
	int rl=dc(l, ml-1, sl, b[0]);
	return ~rl?rl:dc(mr+1, r, b[1], sr);
}

int find_best(int N) {
	n=N;
	vector<int> b=ask(n-1);
	a=b[0]+b[1];
	return a?dc():n-1;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 248 KB Output is correct
2 Correct 2 ms 248 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 248 KB Output is correct
6 Correct 2 ms 248 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 312 KB Output is correct
10 Correct 3 ms 376 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 248 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 312 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 248 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 248 KB Output is correct
9 Correct 2 ms 396 KB Output is correct
10 Correct 2 ms 248 KB Output is correct
11 Correct 4 ms 424 KB Output is correct
12 Correct 2 ms 252 KB Output is correct
13 Correct 5 ms 576 KB Output is correct
14 Correct 4 ms 248 KB Output is correct
15 Correct 8 ms 524 KB Output is correct
16 Correct 41 ms 936 KB Output is correct
17 Correct 2 ms 248 KB Output is correct
18 Correct 48 ms 1012 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 12 ms 376 KB Output is correct
21 Correct 19 ms 572 KB Output is correct
22 Correct 5 ms 376 KB Output is correct
23 Correct 2 ms 248 KB Output is correct
24 Correct 2 ms 312 KB Output is correct
25 Correct 25 ms 760 KB Output is correct
26 Correct 17 ms 772 KB Output is correct
27 Correct 3 ms 248 KB Output is correct
28 Correct 25 ms 1036 KB Output is correct
29 Correct 36 ms 1016 KB Output is correct
30 Correct 25 ms 1240 KB Output is correct
31 Correct 2 ms 248 KB Output is correct
32 Correct 4 ms 572 KB Output is correct
33 Correct 2 ms 248 KB Output is correct
34 Correct 16 ms 572 KB Output is correct
35 Correct 3 ms 376 KB Output is correct
36 Correct 13 ms 424 KB Output is correct
37 Correct 3 ms 376 KB Output is correct
38 Correct 2 ms 248 KB Output is correct
39 Correct 25 ms 632 KB Output is correct
40 Correct 23 ms 1112 KB Output is correct
41 Correct 27 ms 680 KB Output is correct
42 Correct 25 ms 760 KB Output is correct
43 Correct 22 ms 760 KB Output is correct
44 Correct 11 ms 708 KB Output is correct
45 Correct 14 ms 632 KB Output is correct
46 Correct 2 ms 376 KB Output is correct
47 Correct 22 ms 632 KB Output is correct
48 Correct 36 ms 888 KB Output is correct
49 Correct 5 ms 308 KB Output is correct
50 Correct 42 ms 1060 KB Output is correct
51 Correct 19 ms 616 KB Output is correct
52 Correct 3 ms 252 KB Output is correct
53 Correct 5 ms 376 KB Output is correct
54 Correct 20 ms 632 KB Output is correct
55 Correct 2 ms 504 KB Output is correct
56 Correct 38 ms 1064 KB Output is correct
57 Correct 34 ms 828 KB Output is correct
58 Correct 24 ms 896 KB Output is correct
59 Correct 30 ms 760 KB Output is correct
60 Correct 24 ms 760 KB Output is correct
61 Correct 4 ms 376 KB Output is correct
62 Correct 2 ms 316 KB Output is correct
63 Correct 4 ms 376 KB Output is correct
64 Correct 3 ms 248 KB Output is correct
65 Correct 3 ms 248 KB Output is correct
66 Correct 6 ms 248 KB Output is correct
67 Correct 3 ms 252 KB Output is correct
68 Correct 8 ms 248 KB Output is correct
69 Correct 8 ms 248 KB Output is correct
70 Correct 3 ms 248 KB Output is correct
71 Correct 44 ms 1140 KB Output is correct
72 Correct 8 ms 632 KB Output is correct
73 Correct 47 ms 1192 KB Output is correct
74 Correct 46 ms 1048 KB Output is correct
75 Correct 3 ms 392 KB Output is correct
76 Correct 44 ms 1060 KB Output is correct
77 Correct 36 ms 1156 KB Output is correct
78 Correct 8 ms 588 KB Output is correct
79 Correct 14 ms 1024 KB Output is correct
80 Correct 52 ms 1016 KB Output is correct
81 Correct 37 ms 1144 KB Output is correct
82 Correct 39 ms 1144 KB Output is correct
83 Correct 3 ms 404 KB Output is correct
84 Correct 23 ms 1088 KB Output is correct
85 Correct 38 ms 1016 KB Output is correct
86 Correct 11 ms 848 KB Output is correct
87 Correct 3 ms 504 KB Output is correct
88 Correct 8 ms 760 KB Output is correct
89 Correct 12 ms 764 KB Output is correct
90 Correct 2 ms 380 KB Output is correct
91 Correct 7 ms 760 KB Output is correct
92 Correct 6 ms 376 KB Output is correct
93 Correct 5 ms 504 KB Output is correct
94 Correct 6 ms 480 KB Output is correct
95 Correct 5 ms 504 KB Output is correct
96 Correct 4 ms 556 KB Output is correct
97 Correct 2 ms 248 KB Output is correct