# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
529531 | zxcvbnm | trapezoid (balkan11_trapezoid) | C++14 | 51 ms | 2652 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int n;
cin >> n;
vector<array<int, 4>> a(n);
for(auto& i : a) {
for(auto& j : i) {
cin >> j;
}
}
auto cmp = [](const auto& l, const auto& r) {
return r[0] > l[1] && r[2] > l[3];
};
auto ok = [&](int i, int j) {
return a[j][0] > a[i][1] && a[j][2] > a[i][3];
};
sort(a.begin(), a.end(), cmp);
// for(auto& i : a) {
// for(auto& j : i) {
// cout << j << " ";
// }
// cout << "\n";
// }
// bool can[n][n];
// memset(can, false, sizeof can);
//
// for(int i = 0; i < n; i++) {
// for(int j = i+1; j < n; j++) {
// can[i][j] = can[j][i] = ok(i, j);
// }
// }
vector<int> dp(n, 1);
vector<int> mx(n, 1);
for(int i = 0; i < n; i++) {
int l = 0, r = i-1, ans = -1;
while(l <= r) {
int mid = (l + r) / 2;
if (ok(mid, i)) {
ans = mid;
l = mid + 1;
}
else {
r = mid - 1;
}
}
if (ans == -1) continue;
dp[i] = dp[i] + mx[ans];
mx[i] = max(mx[i-1], dp[i]);
}
cout << mx[n-1] << " " << mx[n-1] << "\n";
return 0;
}
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
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