Submission #1110519

#	Time	Username	Problem	Language	Result	Execution time	Memory
1110519		luvna	Rabbit Carrot (LMIO19_triusis)	C++14	100 / 100	21 ms	5320 KiB

triusis

#include<bits/stdc++.h>

#define all(v) v.begin(), v.end()
#define endl "\n"

using namespace std;

const int N = 2e5 + 15;

int n, m;
int a[N];

int lis(vector<int>& potential){
    vector<int> vec;
    for(int x : potential){
        int pos = upper_bound(all(vec), x) - vec.begin();
        if(pos == (int)vec.size()) vec.push_back(x);
        else vec[pos] = x;
    }
    return (int)vec.size();
}

void solve(){
    cin >> n >> m;

    vector<int> potential;

    for(int i = 1; i <= n; i++){
        cin >> a[i];
        if(a[i] <= i*m) potential.push_back(i*m - a[i]);
    }

    cout << n - lis(potential) << endl;
}

signed main(){
    ios_base::sync_with_stdio(NULL);
    cin.tie(0); cout.tie(0);

    #define task "task"

    if(fopen(task".INP", "r")){
        freopen(task".INP", "r", stdin);
        freopen(task".OUT", "w", stdout);
    }

    int t; t = 1; //cin >> t;
    while(t--) solve();
}

Compilation message (stderr)

triusis.cpp: In function 'int main()':
triusis.cpp:43:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |         freopen(task".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
triusis.cpp:44:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |         freopen(task".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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