Poistot

input/code.cpp: In function 'int main()':
input/code.cpp:22:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |         while (k < v.size() && v[k].back() >= x) k++;
      |                ~~^~~~~~~~~~
input/code.cpp:23:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         if (k == v.size()) v.push_back({x});
      |             ~~^~~~~~~~~~~

#include<bits/stdc++.h>
using namespace std;
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define fi first
#define se second
#define pii pair<int,int>
using ll = long long;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int n;
    cin >> n;

    vector<vector<int>> v;
    for (int i = 1; i <= n; i++) {
        int x;
        cin >> x;
        int k = 0;
        while (k < v.size() && v[k].back() >= x) k++;
        if (k == v.size()) v.push_back({x});
        else v[k].push_back(x);
    }

    cout << v.size() << "\n";
    for (auto u : v) {
        for (int x : u) cout << x << " ";
        cout << "\n";
    }
    
    return 0;
}

Test 1

Group: 1, 3

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

Test 3

Group: 1, 3

Verdict: ACCEPTED

Test 4

Group: 1, 3

Verdict: ACCEPTED

Test 5

Group: 2, 3

Verdict: TIME LIMIT EXCEEDED

Test 6

Group: 2, 3

Verdict: TIME LIMIT EXCEEDED

Test 7

Group: 3

Verdict: ACCEPTED

Test 8

Group: 3

Verdict: ACCEPTED

Test 9

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 10

Group: 3

Verdict: TIME LIMIT EXCEEDED