Submission #912268

#	Time	Username	Problem	Language	Result	Execution time	Memory
912268		vjudge1	Rabbit Carrot (LMIO19_triusis)	C++17	100 / 100	28 ms	8628 KiB

triusis

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
#define ent "\n"

const int inf = (int)1e9 + 100;
const int maxn = 5e5 + 100;
const ll INF = (ll)1e18;
const int MOD = 1e9 + 7;
const int maxl = 62500;
const ll P = 31, T = 0;

int n, m;
ll a[maxn];
ll dp[maxn];

void test(){
	cin >> n >> m;
	for(int i = 1; i <= n; i++){
		cin >> a[i];
		a[i] -= 1ll * i * m;
	}
	int ans;
	fill(dp + 1, dp + n + 1, INF);
	for(int i = n; i >= 0; i--){
		ans = 1;
		for(int l = 1, r = n; l <= r;){
			int mid = (l + r) >> 1;
			if(dp[mid] > a[i]) r = mid - 1;
			else l = mid + 1, ans = mid + 1;
		}
		dp[ans] = min(dp[ans], a[i]);
	}
	cout << n - ans + 1 << ent;
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    // #ifndef ONLINE_JUDGE
	//     freopen("input.txt", "r", stdin);
	//     freopen("output.txt", "w", stdout);
    // #endif
    int t = 1;
    if(T) cin >> t;
    while(t--) test();
}

Compilation message (stderr)

triusis.cpp: In function 'void test()':
triusis.cpp:36:12: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   36 |  cout << n - ans + 1 << ent;
      |          ~~^~~~~

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