#include <bits/stdc++.h>
using namespace std;
const int inf = 1e9 + 10;
const int mxn = 20;
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) {
// cout << badd.size() << '\n';
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++;
}
for(int j = 0; j < (k - t); j++) {
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:52:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
52 | if(k - t > badd.size()) return;
| ~~~~~~^~~~~~~~~~~~~
Main.cpp: In function 'void sub1()':
Main.cpp:74:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
74 | for(int i = 0; i <= good.size() && i < k; i++)
| ~~^~~~~~~~~~~~~~
| # |
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 |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Runtime error |
1 ms |
604 KB |
Execution killed with signal 11 |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
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 |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Runtime error |
1 ms |
604 KB |
Execution killed with signal 11 |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 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 |
1 ms |
344 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 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 |
1 ms |
344 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
348 KB |
Output is correct |
| 16 |
Correct |
283 ms |
408 KB |
Output is correct |
| 17 |
Correct |
345 ms |
348 KB |
Output is correct |
| 18 |
Correct |
42 ms |
348 KB |
Output is correct |
| 19 |
Correct |
442 ms |
404 KB |
Output is correct |
| 20 |
Correct |
26 ms |
432 KB |
Output is correct |
| 21 |
Correct |
6 ms |
348 KB |
Output is correct |
| 22 |
Correct |
436 ms |
428 KB |
Output is correct |
| 23 |
Correct |
25 ms |
348 KB |
Output is correct |
| 24 |
Correct |
2 ms |
348 KB |
Output is correct |
| 25 |
Correct |
466 ms |
404 KB |
Output is correct |
| 26 |
Correct |
115 ms |
348 KB |
Output is correct |
| 27 |
Correct |
447 ms |
348 KB |
Output is correct |
| 28 |
Correct |
431 ms |
596 KB |
Output is correct |
| 29 |
Correct |
442 ms |
404 KB |
Output is correct |
| 30 |
Correct |
445 ms |
408 KB |
Output is correct |
| 31 |
Correct |
435 ms |
408 KB |
Output is correct |
| 32 |
Correct |
437 ms |
348 KB |
Output is correct |
| 33 |
Correct |
436 ms |
596 KB |
Output is correct |
| 34 |
Correct |
434 ms |
408 KB |
Output is correct |
| 35 |
Correct |
437 ms |
592 KB |
Output is correct |
| 36 |
Correct |
442 ms |
348 KB |
Output is correct |
| 37 |
Correct |
437 ms |
404 KB |
Output is correct |
| 38 |
Correct |
428 ms |
348 KB |
Output is correct |
| 39 |
Correct |
448 ms |
344 KB |
Output is correct |
| 40 |
Correct |
444 ms |
428 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 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 |
1 ms |
344 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
348 KB |
Output is correct |
| 16 |
Correct |
283 ms |
408 KB |
Output is correct |
| 17 |
Correct |
345 ms |
348 KB |
Output is correct |
| 18 |
Correct |
42 ms |
348 KB |
Output is correct |
| 19 |
Correct |
442 ms |
404 KB |
Output is correct |
| 20 |
Correct |
26 ms |
432 KB |
Output is correct |
| 21 |
Correct |
6 ms |
348 KB |
Output is correct |
| 22 |
Correct |
436 ms |
428 KB |
Output is correct |
| 23 |
Correct |
25 ms |
348 KB |
Output is correct |
| 24 |
Correct |
2 ms |
348 KB |
Output is correct |
| 25 |
Correct |
466 ms |
404 KB |
Output is correct |
| 26 |
Correct |
115 ms |
348 KB |
Output is correct |
| 27 |
Correct |
447 ms |
348 KB |
Output is correct |
| 28 |
Correct |
431 ms |
596 KB |
Output is correct |
| 29 |
Correct |
442 ms |
404 KB |
Output is correct |
| 30 |
Correct |
445 ms |
408 KB |
Output is correct |
| 31 |
Correct |
435 ms |
408 KB |
Output is correct |
| 32 |
Correct |
437 ms |
348 KB |
Output is correct |
| 33 |
Correct |
436 ms |
596 KB |
Output is correct |
| 34 |
Correct |
434 ms |
408 KB |
Output is correct |
| 35 |
Correct |
437 ms |
592 KB |
Output is correct |
| 36 |
Correct |
442 ms |
348 KB |
Output is correct |
| 37 |
Correct |
437 ms |
404 KB |
Output is correct |
| 38 |
Correct |
428 ms |
348 KB |
Output is correct |
| 39 |
Correct |
448 ms |
344 KB |
Output is correct |
| 40 |
Correct |
444 ms |
428 KB |
Output is correct |
| 41 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 42 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
348 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
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 |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Runtime error |
1 ms |
604 KB |
Execution killed with signal 11 |
| 6 |
Halted |
0 ms |
0 KB |
- |
