Submission #991248

#	Time	Username	Problem	Language	Result	Execution time	Memory
991248		ByeWorld	Rabbit Carrot (LMIO19_triusis)	C++14	100 / 100	72 ms	4300 KiB

triusis

#include <bits/stdc++.h>
#define ll long long
// #define int long long
#define fi first
#define se second
#define pb push_back
#define lf ((id<<1))
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
using namespace std;
typedef pair<ll,ll> pii;
typedef pair<pii,ll> ipii;
const int MAXN = 2e5+10;
const ll MOD = 1e9+7;
const ll INF = 1e18+10;
const int LOG = 21;

int n, m;
int a[MAXN], b[MAXN];

signed main(){
	// ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n >> m;
	for(int i=1; i<=n; i++) cin >> a[i];

	int ans = 0;
	for(int i=1; i<=n; i++) a[i] -= i*m;
	vector <int> vec;
	for(int i=1; i<=n; i++){
		a[i] = -a[i];
		// cout << a[i] << ' ';
		if(a[i] < 0) continue;
		if(vec.empty()){
			vec.pb(a[i]); continue;
		}
		int idx = upper_bound(vec.begin(), vec.end(), a[i])-vec.begin();
		if(idx==vec.size()) vec.pb(a[i]);
		else vec[idx] = a[i];
	}
	cout << n-vec.size() << '\n';
}

Compilation message (stderr)

triusis.cpp: In function 'int main()':
triusis.cpp:37:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |   if(idx==vec.size()) vec.pb(a[i]);
      |      ~~~^~~~~~~~~~~~
triusis.cpp:26:6: warning: unused variable 'ans' [-Wunused-variable]
   26 |  int ans = 0;
      |      ^~~

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