Submission #1068105

#	Time	Username	Problem	Language	Result	Execution time	Memory
1068105		HUYHDUVE	Rabbit Carrot (LMIO19_triusis)	C++14	100 / 100	20 ms	3936 KiB

triusis

//  ^------^
// ( '(oo)' )
// (  u  u  )

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;

#define IN "A.IN"
#define OUT "A.OUT"

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr);
    if(fopen(IN, "r")){
        freopen(IN, "r", stdin);
        freopen(OUT, "w", stdout);
    }

    int n, k; cin >> n >> k;

    vector<int> hei(n);
    for(int &i : hei) cin >> i;
    int cnt = 0;

    if(hei[0] > k){
        cnt ++;
        hei[0] = k;
    }


    for(int i = 0; i < n; i++){
        hei[i] = k*(i + 1) - hei[i];
    }


    vector<int> min_j(n + 1, 0);
    int mx = 0;

    auto bs = [&](int u) -> int{
        int l = 0, r = mx, ans = 0;
        while(l <= r){
            int m = (l + r)/2;

            if(min_j[m] <= u){
                ans = m;
                l = m + 1;
            }
            else r = m - 1;
        }

        return ans;
    };

    for(int i = 0; i < n; i++){
        if(hei[i] < 0) continue;
        int j = bs(hei[i]);
        mx = max(mx, j + 1);
        min_j[j + 1] = hei[i];
    }

    cout << n - mx + cnt;




    return 0;
}

Compilation message (stderr)

triusis.cpp: In function 'int main()':
triusis.cpp:16:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         freopen(IN, "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~
triusis.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen(OUT, "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~

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