oj.uz

Submission #887332

# Submission time Handle Problem Language Result Execution time Memory
887332 2023-12-14T09:15:38 Z dubabuba Let's Win the Election (JOI22_ho_t3) C++14
23 / 100
 498 ms 756 KB 
#include <bits/stdc++.h>
using namespace std;
 
const int inf = 1e9 + 10;
const int mxn = 550;
int a[mxn], n;
int b[mxn], k;
 
vector<int> good;
vector<int> badd;
 
double ans = 1e9;
void solve2(int map) {
	vector<int> vote = badd;
	vector<int> help;
	double ret = 0.0;
 
	for(int i = 0; i < good.size(); i++)
	if(map & (1 << i))
		help.push_back(good[i]);
	else
		vote.push_back(good[i]);
 
	if(help.size() > k) return;
 
	sort(help.begin(), help.end(), [&](int i, int j) { return b[i] < b[j]; });
	sort(vote.begin(), vote.end(), [&](int i, int j) { return a[i] < a[j]; });
 
	int helpers = 0;
	for(int i : help) {
		ret += 1.0 * b[i] / (1.0 + helpers);
		helpers++;
	}
 
	for(int j = 0; j < (k - help.size()); j++) {
		int i = vote[j];
		ret += 1.0 * a[i] / (1.0 + helpers);
	}
 
	ans = min(ans, ret);
}
 
void sub2() {
	for(int bit = 0; bit < (1 << good.size()); bit++)
		solve2(bit);
	cout << setprecision(5) << fixed << ans << '\n';
	exit(0);
}
 
void solve1(int t) {
	if(k - t >= badd.size()) return;
	double ret = 0.0;
 
	int helpers = 0;
	for(int j = 0; j < t; j++) {
		int i = good[j];
		ret += 1.0 * a[i] / (1.0 + helpers);
		helpers++;
	}
 
	assert(helpers == t);
	for(int j = 0; j < (k - t); j++) {
		if(j >= badd.size())
			for(;;);
		int i = badd[j];
		ret += 1.0 * a[i] / (1.0 + t);
	}
 
	ans = min(ans, ret);
}
 
void sub1() {
	sort(good.begin(), good.end(), [&](int i, int j) { return a[i] < a[j]; });
	sort(badd.begin(), badd.end(), [&](int i, int j) { return a[i] < a[j]; });
 
	for(int i = 0; i <= good.size() && i < k; i++)
		solve1(i);
	cout << setprecision(5) << fixed << ans << '\n';
	exit(0);
}
 
int main() {
	cin >> n >> k;
	for(int i = 0; i < n; i++) {
		cin >> a[i] >> b[i];
		if(b[i] == -1) {
			b[i] = inf;
			badd.push_back(i);
		}
		else
			good.push_back(i);
	}
 
	if(n <= 20) sub2();
	sub1();
	return 0;
}

Compilation message

Main.cpp: In function 'void solve2(int)':
Main.cpp:18:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |  for(int i = 0; i < good.size(); i++)
      |                 ~~^~~~~~~~~~~~~
Main.cpp:24:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   24 |  if(help.size() > k) return;
      |     ~~~~~~~~~~~~^~~
Main.cpp:35:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |  for(int j = 0; j < (k - help.size()); j++) {
      |                 ~~^~~~~~~~~~~~~~~~~~~
Main.cpp: In function 'void solve1(int)':
Main.cpp:51:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |  if(k - t >= badd.size()) return;
      |     ~~~~~~^~~~~~~~~~~~~~
Main.cpp:63:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |   if(j >= badd.size())
      |      ~~^~~~~~~~~~~~~~
Main.cpp: In function 'void sub1()':
Main.cpp:76:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |  for(int i = 0; i <= good.size() && i < k; i++)
      |                 ~~^~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Incorrect 0 ms 348 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Incorrect 0 ms 348 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 432 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct

Subtask #4
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 432 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 281 ms 596 KB Output is correct
17 Correct 355 ms 412 KB Output is correct
18 Correct 41 ms 344 KB Output is correct
19 Correct 434 ms 416 KB Output is correct
20 Correct 26 ms 344 KB Output is correct
21 Correct 6 ms 348 KB Output is correct
22 Correct 441 ms 412 KB Output is correct
23 Correct 27 ms 344 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 498 ms 348 KB Output is correct
26 Correct 112 ms 348 KB Output is correct
27 Correct 434 ms 348 KB Output is correct
28 Correct 431 ms 412 KB Output is correct
29 Correct 442 ms 412 KB Output is correct
30 Correct 441 ms 756 KB Output is correct
31 Correct 449 ms 596 KB Output is correct
32 Correct 451 ms 360 KB Output is correct
33 Correct 437 ms 408 KB Output is correct
34 Correct 433 ms 412 KB Output is correct
35 Correct 428 ms 416 KB Output is correct
36 Correct 445 ms 592 KB Output is correct
37 Correct 433 ms 348 KB Output is correct
38 Correct 430 ms 412 KB Output is correct
39 Correct 452 ms 348 KB Output is correct
40 Correct 451 ms 592 KB Output is correct

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 432 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 281 ms 596 KB Output is correct
17 Correct 355 ms 412 KB Output is correct
18 Correct 41 ms 344 KB Output is correct
19 Correct 434 ms 416 KB Output is correct
20 Correct 26 ms 344 KB Output is correct
21 Correct 6 ms 348 KB Output is correct
22 Correct 441 ms 412 KB Output is correct
23 Correct 27 ms 344 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 498 ms 348 KB Output is correct
26 Correct 112 ms 348 KB Output is correct
27 Correct 434 ms 348 KB Output is correct
28 Correct 431 ms 412 KB Output is correct
29 Correct 442 ms 412 KB Output is correct
30 Correct 441 ms 756 KB Output is correct
31 Correct 449 ms 596 KB Output is correct
32 Correct 451 ms 360 KB Output is correct
33 Correct 437 ms 408 KB Output is correct
34 Correct 433 ms 412 KB Output is correct
35 Correct 428 ms 416 KB Output is correct
36 Correct 445 ms 592 KB Output is correct
37 Correct 433 ms 348 KB Output is correct
38 Correct 430 ms 412 KB Output is correct
39 Correct 452 ms 348 KB Output is correct
40 Correct 451 ms 592 KB Output is correct
41 Incorrect 0 ms 348 KB Output isn't correct
42 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Incorrect 0 ms 348 KB Output isn't correct
10 Halted 0 ms 0 KB -