Submission #827557

#	Time	Username	Problem	Language	Result	Execution time	Memory
827557		Anthony_Liu	Rabbit Carrot (LMIO19_triusis)	C++11	100 / 100	25 ms	5320 KiB

triusis

#include<bits/stdc++.h>
using namespace std;
//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx2")
//#pragma GCC optimization ("unroll-loops")
#define f first
#define s second
#define ll long long
#define pb push_back
#define pi pair <int,int>
#define vi vector <int>
#define size(x) (int)(x).size()
#define all(x) x.begin(), x.end()
void setIO(string name = "") {
	cin.tie(0)->sync_with_stdio(0);
	if (size(name)) {
		freopen((name + ".in").c_str(), "r", stdin);
		freopen((name + ".out").c_str(), "w", stdout);
	}
}

int lis(vi &a) {
	vi dp;
	for (auto u : a) {
		int p = upper_bound(all(dp), u) - dp.begin();
		if (p == size(dp)) dp.pb(u);
		else dp[p] = u;
	}
	return size(dp);
}

int N, M;

int main()
{
	setIO();
	cin >> N >> M;

	vi poles(N);
	for (int i = 0; i < N; i++) cin >> poles[i];

	vi pos;
	for (int i = 1; i <= N; i++) {
		if (i * M >= poles[i - 1]) {
			pos.pb(i * M - poles[i - 1]);
		}
	}
	cout << N - lis(pos) << endl;
	return 0;
}

Compilation message (stderr)

triusis.cpp: In function 'void setIO(std::string)':
triusis.cpp:17:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |   freopen((name + ".in").c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
triusis.cpp:18:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |   freopen((name + ".out").c_str(), "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 21 / 21
• Subtask 3: 28 / 28
• Subtask 4: 37 / 37