Submission #1261435

#	Time	Username	Problem	Language	Result	Execution time	Memory
1261435		hoa208	Rabbit Carrot (LMIO19_triusis)	C++20	100 / 100	17 ms	3400 KiB

triusis

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; i++)
#define FORD(i, b, a) for (int i = (b), _a = (a); i >= _a; i--)
#define pa pair<ll, ll>
#define fi first
#define se second
#define bit(mask, j) ((mask >> j) & 1)
#define t_test int t;cin >> t;while(t--)
const   ll mod = 1e9 + 7;
const   ll INF = 1e18;
inline  void adm(ll &x){if(x>=mod)x%=mod;else if(x<0)x+=mod;}
//--------------------------------------------------------------------

ll n, m;
const ll N = 2e5 + 10;
ll a[N], b[N];
void hbmt() {
    cin >> n >> m;
    vector<ll> vt;
    FOR(i, 1, n) {
        cin >> a[i];
        a[i] = m * i - a[i];
    }
    ll k = 0;
    FOR(i, 1, n) {
        if(a[i] < 0) continue;
        if(k == 0) {
            b[++k] = a[i];
            continue;
        }
        ll vt = upper_bound(b + 1, b + k + 1, a[i]) - b;
        b[vt] = a[i];
        k = max(vt, k);
    }
    cout << n - k;
}

int main() {
    
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    
    if(fopen("hbmt.inp", "r")) {
        freopen("hbmt.inp", "r", stdin);
        freopen("hbmt.out", "w", stdout);
    }
    
    // t_test 
    hbmt();
    return 0;
}

Compilation message (stderr)

triusis.cpp: In function 'int main()':
triusis.cpp:46:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |         freopen("hbmt.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
triusis.cpp:47:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         freopen("hbmt.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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