Submission #700222

#	Time	Username	Problem	Language	Result	Execution time	Memory
700222		LucasLe	Rabbit Carrot (LMIO19_triusis)	C++17	100 / 100	79 ms	6836 KiB

triusis

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

int main() {

    ll N, M; cin >> N >> M;
    vector<ll> b;
    for (ll i = 1; i <= N; ++i) {
        ll x; cin >> x;
        if (x <= M * i) {
            b.push_back(M * i - x);
        }
    }

    vector<ll> lis;
    for (ll x : b) {
        ll pos = upper_bound(lis.begin(), lis.end(), x) - lis.begin();
        if (pos == lis.size()) lis.push_back(x);
        else lis[pos] = x;
    }

    cout << N - lis.size();
}

Compilation message (stderr)

triusis.cpp: In function 'int main()':
triusis.cpp:19:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |         if (pos == lis.size()) lis.push_back(x);
      |             ~~~~^~~~~~~~~~~~~

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