Submission #660275

#	Time	Username	Problem	Language	Result	Execution time	Memory
660275		chanhchuong123	Rabbit Carrot (LMIO19_triusis)	C++14	100 / 100	33 ms	6700 KiB

triusis

#include <bits/stdc++.h>
using namespace std;
#define task "C"
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

template <typename T1, typename T2> bool mini(T1 &a, T2 b) {
  if (a > b) {a = b; return true;} return false;
}
template <typename T1, typename T2> bool maxi(T1 &a, T2 b) {
  if (a < b) {a = b; return true;} return false;
}

const int N = 2e5 + 3;
int n, M;
int a[N];
long long b[N];
vector<long long> dp;

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

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

  cin >> n >> M;
  for (int i = 1; i <= n; i++) {
    cin >> a[i];
    b[i] = 1LL * M * i - a[i];
  }
  for (int i = 1; i <= n; i++) if (b[i] >= 0) {
    int x = upper_bound(all(dp), b[i]) - dp.begin();
    if (x != dp.size()) dp[x] = b[i];
    else dp.push_back(b[i]);
  }
  cout << n - dp.size();
}

Compilation message (stderr)

triusis.cpp:22:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   22 | main() {
      | ^~~~
triusis.cpp: In function 'int main()':
triusis.cpp:38:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     if (x != dp.size()) dp[x] = b[i];
      |         ~~^~~~~~~~~~~~
triusis.cpp:27:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     freopen(task".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
triusis.cpp:28:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |     freopen(task".out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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