結果
| 問題 | No.165 四角で囲え! |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-08-07 01:44:50 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 1,001 ms / 5,000 ms |
| コード長 | 2,977 bytes |
| コンパイル時間 | 995 ms |
| コンパイル使用メモリ | 95,464 KB |
| 実行使用メモリ | 5,376 KB |
| 最終ジャッジ日時 | 2024-07-18 14:32:21 |
| 合計ジャッジ時間 | 4,557 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 19 |
ソースコード
#include <iostream>
#include <vector>
#include <utility>
#include <set>
#include <list>
#include <cassert>
#include <queue>
#include <cmath>
#include <map>
#include <algorithm>
using namespace std;
using ll = long long int;
#define REP(i, n) for(int i = 0; i < (int)(n); i++)
#define YES(n) std::cout << ((n) ? "YES" : "NO" ) << "\n";
#define Yes(n) std::cout << ((n) ? "Yes" : "No" ) << "\n";
#define ALL_INCLUDED_ENVIRONMENT
template <class T, class Alloc, template <class, class> class C> std::ostream& operator<<(std::ostream& o, const C<T, Alloc>& v) {
o << "{";
bool init = 1;
for (auto e : v) {
if (init) { init = 0; }
else { o << ", "; }
o << e;
}
o << "}";
return o;
}
int n, b, sup_x, sup_y, res;
vector<int> xs, ys, ps, xs_cache, ys_cache;
vector<vector<int> > cumuls, exists;
template <class T> inline T get_2dcumul(const vector<vector<T> >& cumuls, int y1, int x1, int y2, int x2) {
return cumuls[y2][x2] - cumuls[y2][x1] - cumuls[y1][x2] + cumuls[y1][x1];
}
int main() {
// cin.tie(0);
// ios::sync_with_stdio(false);
cin >> n >> b;
REP (i, n) {
int x, y, p;
cin >> x >> y >> p;
xs.push_back(x);
ys.push_back(y);
ps.push_back(p);
xs_cache.push_back(x);
ys_cache.push_back(y);
}
sort(xs_cache.begin(), xs_cache.end(), std::less<int>());
sort(ys_cache.begin(), ys_cache.end(), std::less<int>());
xs_cache.erase(unique(xs_cache.begin(), xs_cache.end()), xs_cache.end());
ys_cache.erase(unique(ys_cache.begin(), ys_cache.end()), ys_cache.end());
REP (i, n) {
xs[i] = lower_bound(xs_cache.begin(), xs_cache.end(), xs[i]) - xs_cache.begin();
ys[i] = lower_bound(ys_cache.begin(), ys_cache.end(), ys[i]) - ys_cache.begin();
}
sup_x = xs_cache.size();
sup_y = ys_cache.size();
cumuls = vector<vector<int> >(sup_y+1, vector<int>(sup_x+1, 0));
exists = vector<vector<int> >(sup_y+1, vector<int>(sup_x+1, 0));
REP (i, n) {
int x = xs[i];
int y = ys[i];
cumuls[y+1][x+1] += ps[i];
exists[y+1][x+1] += 1;
}
REP (i, sup_y+1) {
REP (j, sup_x) {
cumuls[i][j+1] += cumuls[i][j];
exists[i][j+1] += exists[i][j];
}
}
REP (j, sup_x+1) {
REP (i, sup_y) {
cumuls[i+1][j] += cumuls[i][j];
exists[i+1][j] += exists[i][j];
}
}
res = 0;
REP (y1, sup_y+1) {
REP (x1, sup_x+1) {
for (int y2 = y1 + 1; y2 <= sup_y; y2++) {
if (get_2dcumul(cumuls, y1, x1, y2, sup_x) <= b) {
res = max(res, get_2dcumul(exists, y1, x1, y2, sup_x));
} else {
int ok = x1;
int ng = sup_x;
while(1) {
if (ng - ok <= 1) {
res = max(res, get_2dcumul(exists, y1, x1, y2, ok));
break;
}
int mid = (ng + ok)/2;
if (get_2dcumul(cumuls, y1, x1, y2, mid) <= b)
ok = mid;
else
ng = mid;
}
}
}
}
}
cout << res << "\n";
return 0;
}