Submission #866768

#	Time	Username	Problem	Language	Result	Execution time	Memory
866768		tienbinh	Rabbit Carrot (LMIO19_triusis)	C++17	100 / 100	39 ms	10028 KiB

triusis

#include <bits/stdc++.h>

using namespace std;
#define int long long
#define name ""
#define all(x) x.begin(), x.end()
const int N = 2e5 + 7;
long long  b[N], M, a[N];
using ll = long long;
int n;
basic_string <ll> compress, v;
struct BIT{
    long long bit[N];
    BIT() {memset(bit, 0, sizeof bit);}
    void upd(int x, long long val){
        for(; x < N ; x += (x & - x)) bit[x] = max(bit[x], val);
    }
    long long get(int x){
        long long ans = 0;
        for(; x >= 1; x -= (x & - x)) ans = max(ans, bit[x]);
        return ans;
    }
}bit;
signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    if(fopen("bug.inp", "r"))
        freopen("bug.inp", "r", stdin), freopen("bug.out", "w", stdout);
    else if (fopen(name".inp", "r"))
        freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout);
    cin >> n >> M;
    for(int i = 1; i <= n ; i++){
        cin >> a[i];
        if(i * M >= a[i]) v += (i * M - a[i]), compress += (i * M - a[i]);
    }
    sort(all(compress));
    compress.erase(unique(all(compress)), compress.end());
    for(int i = 0; i < v.size() ; i++)
        v[i] = lower_bound(all(compress), v[i]) - compress.begin() + 1;
    long long ans = 0;
    for(int it : v){
        long long tmp = bit.get(it) + 1;
        ans  = max(ans, tmp);
        bit.upd(it, tmp);
    }
    cout << n - ans;
    return 0;
}

Compilation message (stderr)

triusis.cpp: In function 'int main()':
triusis.cpp:39:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for(int i = 0; i < v.size() ; i++)
      |                    ~~^~~~~~~~~~
triusis.cpp:29:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         freopen("bug.inp", "r", stdin), freopen("bug.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
triusis.cpp:29:48: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         freopen("bug.inp", "r", stdin), freopen("bug.out", "w", stdout);
      |                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
triusis.cpp:31:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
triusis.cpp:31:49: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout);
      |                                          ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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