oj.uz

Submission #941648

# Submission time Handle Problem Language Result Execution time Memory
941648 2024-03-09T08:19:38 Z shoryu386 A Difficult(y) Choice (BOI21_books) C++17
100 / 100
 49 ms 700 KB 
#include <bits/stdc++.h>
#include "books.h"
using namespace std;


typedef long long ll;
    
long long gA, gK; 
void recur(int x, int taken, ll sum, vector<pair<int, ll>> takeitem, vector<pair<int, ll>> &items){
	if (taken == gK){
		if (gA <= sum && sum <= 2LL*gA){
			vector<int> indices;
			for (int x = 0; x < (int)takeitem.size(); x++){
				indices.push_back(takeitem[x].first);
			}
			answer(indices);
			return;
		}
		return;
	}
	if (x == items.size()) return;
	
	recur(x+1, taken, sum, takeitem, items);
	
	if (taken != gK){
		takeitem.push_back(items[x]);
		recur(x+1, taken+1, sum+items[x].second, takeitem, items);
	}
}

void solve(int N, int K, long long A, int S) {
    // TODO implement this function
    
    //k books, sum of A
    
    //x, x+1, x+2, x+3, x+4, x+5... and so on
    
    gA = A; gK = K;
    
    int extrasum = 0;
    for (int x = 0; x < K; x++){
		extrasum += x;
	}
	
	//we want A <= x*K + extrasum <= 2*A
	//x*K + extrasum >= A
	//x*K >= A-extrasum
	//x >= (A-extrasum)/K
	
	ll target = (A - extrasum)/K + ((A - extrasum)%K != 0);
	//to do: check rounding
	
	if (A - extrasum <= 0) {impossible(); return;}
	
	int l = 1, r = N+1-K, ans = N+1-K;
	while (l <= r){
		int m = (l+r)/2;
		
		ll res = skim(m);
		
		if (res >= target){
			r = m-1;
			ans = m;
		}
		else{
			l = m+1;
		}
	}
	
	vector<pair<int, ll>> items; set<int> indicesInside;
	for (int x = max(1, ans); x < min(N+1, ans+K); x++){
		items.push_back({x, skim(x)}); indicesInside.insert(x);
	}
	
	for (int x = 1; x <= 10; x++){
		if (indicesInside.count(x) == 0) items.push_back({x, skim(x)}), indicesInside.insert(x);
	}
	
	recur(0, 0, 0, {}, items);
	
	impossible();
}

Compilation message

books.cpp: In function 'void recur(int, int, ll, std::vector<std::pair<int, long long int> >, std::vector<std::pair<int, long long int> >&)':
books.cpp:21:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |  if (x == items.size()) return;
      |      ~~^~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 600 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 38 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 37 ms 600 KB Output is correct
12 Correct 37 ms 596 KB Output is correct
13 Correct 2 ms 344 KB Output is correct
14 Correct 12 ms 344 KB Output is correct
15 Correct 12 ms 600 KB Output is correct
16 Correct 39 ms 344 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 37 ms 600 KB Output is correct
3 Correct 49 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 38 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 37 ms 600 KB Output is correct
3 Correct 49 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 38 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 37 ms 440 KB Output is correct
12 Correct 37 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 39 ms 444 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 37 ms 440 KB Output is correct
20 Correct 37 ms 344 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 12 ms 600 KB Output is correct
24 Correct 12 ms 344 KB Output is correct
25 Correct 12 ms 344 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 37 ms 600 KB Output is correct
3 Correct 49 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 38 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 37 ms 440 KB Output is correct
12 Correct 37 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 39 ms 444 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 37 ms 440 KB Output is correct
20 Correct 37 ms 344 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 12 ms 600 KB Output is correct
24 Correct 12 ms 344 KB Output is correct
25 Correct 12 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 37 ms 600 KB Output is correct
28 Correct 37 ms 344 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 0 ms 344 KB Output is correct
33 Correct 37 ms 584 KB Output is correct
34 Correct 0 ms 344 KB Output is correct
35 Correct 37 ms 600 KB Output is correct
36 Correct 38 ms 344 KB Output is correct
37 Correct 1 ms 344 KB Output is correct
38 Correct 1 ms 436 KB Output is correct
39 Correct 17 ms 516 KB Output is correct
40 Correct 12 ms 344 KB Output is correct
41 Correct 12 ms 344 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 0 ms 344 KB Output is correct
44 Correct 43 ms 600 KB Output is correct
45 Correct 0 ms 340 KB Output is correct
46 Correct 0 ms 344 KB Output is correct
47 Correct 37 ms 344 KB Output is correct
48 Correct 12 ms 344 KB Output is correct
49 Correct 1 ms 436 KB Output is correct
50 Correct 37 ms 600 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 37 ms 600 KB Output is correct
3 Correct 49 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 38 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 37 ms 440 KB Output is correct
12 Correct 37 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 39 ms 444 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 37 ms 440 KB Output is correct
20 Correct 37 ms 344 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 12 ms 600 KB Output is correct
24 Correct 12 ms 344 KB Output is correct
25 Correct 12 ms 344 KB Output is correct
26 Correct 1 ms 544 KB Output is correct
27 Correct 37 ms 436 KB Output is correct
28 Correct 37 ms 340 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 344 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 45 ms 344 KB Output is correct
34 Correct 1 ms 600 KB Output is correct
35 Correct 41 ms 344 KB Output is correct
36 Correct 37 ms 600 KB Output is correct
37 Correct 1 ms 344 KB Output is correct
38 Correct 0 ms 440 KB Output is correct
39 Correct 12 ms 432 KB Output is correct
40 Correct 12 ms 344 KB Output is correct
41 Correct 11 ms 596 KB Output is correct
42 Correct 37 ms 344 KB Output is correct
43 Correct 1 ms 344 KB Output is correct
44 Correct 1 ms 432 KB Output is correct
45 Correct 1 ms 600 KB Output is correct
46 Correct 2 ms 344 KB Output is correct
47 Correct 40 ms 452 KB Output is correct
48 Correct 14 ms 344 KB Output is correct
49 Correct 12 ms 600 KB Output is correct
50 Correct 17 ms 344 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 37 ms 600 KB Output is correct
3 Correct 49 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 38 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 37 ms 440 KB Output is correct
12 Correct 37 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 39 ms 444 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 37 ms 440 KB Output is correct
20 Correct 37 ms 344 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 12 ms 600 KB Output is correct
24 Correct 12 ms 344 KB Output is correct
25 Correct 12 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 37 ms 600 KB Output is correct
28 Correct 37 ms 344 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 0 ms 344 KB Output is correct
33 Correct 37 ms 584 KB Output is correct
34 Correct 0 ms 344 KB Output is correct
35 Correct 37 ms 600 KB Output is correct
36 Correct 38 ms 344 KB Output is correct
37 Correct 1 ms 344 KB Output is correct
38 Correct 1 ms 436 KB Output is correct
39 Correct 17 ms 516 KB Output is correct
40 Correct 12 ms 344 KB Output is correct
41 Correct 12 ms 344 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 0 ms 344 KB Output is correct
44 Correct 43 ms 600 KB Output is correct
45 Correct 0 ms 340 KB Output is correct
46 Correct 0 ms 344 KB Output is correct
47 Correct 37 ms 344 KB Output is correct
48 Correct 12 ms 344 KB Output is correct
49 Correct 1 ms 436 KB Output is correct
50 Correct 37 ms 600 KB Output is correct
51 Correct 1 ms 544 KB Output is correct
52 Correct 37 ms 436 KB Output is correct
53 Correct 37 ms 340 KB Output is correct
54 Correct 1 ms 344 KB Output is correct
55 Correct 0 ms 344 KB Output is correct
56 Correct 0 ms 344 KB Output is correct
57 Correct 1 ms 344 KB Output is correct
58 Correct 45 ms 344 KB Output is correct
59 Correct 1 ms 600 KB Output is correct
60 Correct 41 ms 344 KB Output is correct
61 Correct 37 ms 600 KB Output is correct
62 Correct 1 ms 344 KB Output is correct
63 Correct 0 ms 440 KB Output is correct
64 Correct 12 ms 432 KB Output is correct
65 Correct 12 ms 344 KB Output is correct
66 Correct 11 ms 596 KB Output is correct
67 Correct 37 ms 344 KB Output is correct
68 Correct 1 ms 344 KB Output is correct
69 Correct 1 ms 432 KB Output is correct
70 Correct 1 ms 600 KB Output is correct
71 Correct 2 ms 344 KB Output is correct
72 Correct 40 ms 452 KB Output is correct
73 Correct 14 ms 344 KB Output is correct
74 Correct 12 ms 600 KB Output is correct
75 Correct 17 ms 344 KB Output is correct
76 Correct 1 ms 344 KB Output is correct
77 Correct 0 ms 344 KB Output is correct
78 Correct 0 ms 344 KB Output is correct
79 Correct 0 ms 344 KB Output is correct
80 Correct 0 ms 344 KB Output is correct
81 Correct 1 ms 344 KB Output is correct
82 Correct 0 ms 600 KB Output is correct
83 Correct 1 ms 344 KB Output is correct
84 Correct 37 ms 600 KB Output is correct
85 Correct 0 ms 344 KB Output is correct
86 Correct 37 ms 700 KB Output is correct
87 Correct 43 ms 600 KB Output is correct
88 Correct 2 ms 344 KB Output is correct
89 Correct 12 ms 432 KB Output is correct
90 Correct 12 ms 344 KB Output is correct
91 Correct 42 ms 344 KB Output is correct
92 Correct 1 ms 344 KB Output is correct
93 Correct 37 ms 440 KB Output is correct
94 Correct 47 ms 344 KB Output is correct
95 Correct 0 ms 344 KB Output is correct
96 Correct 0 ms 344 KB Output is correct
97 Correct 0 ms 596 KB Output is correct
98 Correct 0 ms 344 KB Output is correct
99 Correct 36 ms 436 KB Output is correct
100 Correct 1 ms 344 KB Output is correct
101 Correct 45 ms 612 KB Output is correct
102 Correct 49 ms 344 KB Output is correct
103 Correct 0 ms 596 KB Output is correct
104 Correct 0 ms 600 KB Output is correct
105 Correct 13 ms 344 KB Output is correct
106 Correct 12 ms 344 KB Output is correct
107 Correct 12 ms 596 KB Output is correct
108 Correct 1 ms 344 KB Output is correct
109 Correct 0 ms 344 KB Output is correct
110 Correct 37 ms 592 KB Output is correct
111 Correct 0 ms 344 KB Output is correct
112 Correct 1 ms 344 KB Output is correct
113 Correct 39 ms 440 KB Output is correct
114 Correct 12 ms 596 KB Output is correct
115 Correct 1 ms 344 KB Output is correct
116 Correct 37 ms 444 KB Output is correct
117 Correct 45 ms 612 KB Output is correct
118 Correct 0 ms 344 KB Output is correct
119 Correct 1 ms 600 KB Output is correct
120 Correct 1 ms 600 KB Output is correct
121 Correct 2 ms 600 KB Output is correct
122 Correct 37 ms 344 KB Output is correct
123 Correct 12 ms 344 KB Output is correct
124 Correct 12 ms 440 KB Output is correct
125 Correct 12 ms 344 KB Output is correct
126 Correct 1 ms 436 KB Output is correct
127 Correct 1 ms 344 KB Output is correct
128 Correct 37 ms 432 KB Output is correct
129 Correct 1 ms 344 KB Output is correct
130 Correct 47 ms 432 KB Output is correct
131 Correct 37 ms 596 KB Output is correct
132 Correct 0 ms 344 KB Output is correct
133 Correct 12 ms 436 KB Output is correct
134 Correct 14 ms 344 KB Output is correct
135 Correct 37 ms 344 KB Output is correct