Submission #1156715

#	Time	Username	Problem	Language	Result	Execution time	Memory
1156715		eudhsyf	Rabbit Carrot (LMIO19_triusis)	C++20	100 / 100	18 ms	4936 KiB

triusis

/*
   Author :
*/
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

#define fi first
#define se second
#define pii pair<int, int>
#define pb push_back
#define eb emplace_back
#define task "file"
const int nmax = 1e6 + 5;
int n, dp[nmax], m, a[nmax]; 
signed main()
{
    if (fopen(task ".inp", "r"))
    {
        freopen(task ".inp", "r", stdin);
        freopen(task ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i];
        a[i] = i * m - a[i];
    }
    memset(dp, 0x3f, sizeof(dp));
    dp[0] = 0;
    int d = 0;
    for (int i = 1; i <= n; i++)
    {
        if (a[i] >= 0)
        {
            int l = 1, r = d, id = 0;
            while (l <= r)
            {
                int mid = l + r >> 1;
                if (dp[mid] <= a[i])
                {
                    id = mid,
                    l = mid + 1;
                }
                else
                    r = mid - 1;
            }
            if (id == d)
                d++;
            dp[id + 1] = a[i];
        }
    }
    cout << n - d;
    return 0;
}

Compilation message (stderr)

triusis.cpp: In function 'int main()':
triusis.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         freopen(task ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
triusis.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen(task ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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