Submission #834286

#	Time	Username	Problem	Language	Result	Execution time	Memory
834286		HollaFoil	Arcade (NOI20_arcade)	C++14	100 / 100	289 ms	16552 KiB

Arcade

#include <bits/stdc++.h>
using namespace std;

int main() {
    int n, m;
    cin >> n >> m;
    vector<int> times(m);
    vector<int> locations(m);
    vector<pair<int, int>> rotated(m);
    for (int i = 0; i < m; i++) cin >> times[i];
    for (int i = 0; i < m; i++) cin >> locations[i];
    for (int i = 0; i < m; i++) rotated[i] = make_pair(times[i]+locations[i], times[i]-locations[i]);

    sort(rotated.rbegin(), rotated.rend());
    vector<int> antichain;
    for (int i = 0; i < m; i++) {
        auto it = lower_bound(antichain.begin(), antichain.end(), rotated[i].second);
        int offset = (int)(it-antichain.begin());
		if (offset == antichain.size()) antichain.push_back(rotated[i].second);
		else antichain[offset] = rotated[i].second;
    }
    cout << antichain.size();
}

Compilation message (stderr)

Arcade.cpp: In function 'int main()':
Arcade.cpp:19:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |   if (offset == antichain.size()) antichain.push_back(rotated[i].second);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 14 / 14
• Subtask 6: 20 / 20
• Subtask 7: 15 / 15