Submission #922312

#	Time	Username	Problem	Language	Result	Execution time	Memory
922312		Shayan86	Stone Arranging 2 (JOI23_ho_t1)	C++17	100 / 100	80 ms	9292 KiB

Main

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

#pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
// Ofast, O0, O1, O2, O3, unroll-loops, fast-math, trapv

typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;

#define Mp          make_pair
#define sep         ' '
#define endl        '\n'
#define F	        first
#define S	        second
#define pb          push_back
#define all(x)      (x).begin(),(x).end()
#define kill(res)	cout << res << '\n', exit(0);
#define set_dec(x)	cout << fixed << setprecision(x);
#define fast_io     ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io     freopen("input.txt", "r", stdin) ; freopen("output.txt", "w", stdout);

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const ll N = 2e5 + 50;
const ll Mod = 1e9 + 7;

ll n, a[N], cnt[N];

vector<int> vec, block;

int main(){
    fast_io;
    
    cin >> n;

    for(int i = 1; i <= n; i++){
        cin >> a[i]; vec.pb(a[i]);
    }

    sort(all(vec));
    vec.resize(unique(all(vec)) - vec.begin());

    for(int i = 1; i <= n; i++) a[i] = lower_bound(all(vec), a[i]) - vec.begin() + 1;

    block.pb(1); cnt[a[1]]++;
    for(int i = 2; i <= n; i++){
        if(cnt[a[i]]){
            while(a[block.back()] != a[i]){
                cnt[a[block.back()]]--; block.pop_back();
            }
        }
        else{
            block.pb(i); cnt[a[i]]++;
        }
    }
    block.pb(n+1);

    for(int i = 0; i < block.size()-1; i++){
        for(int j = block[i]; j < block[i+1]; j++) cout << vec[a[block[i]]-1] << endl;
    }

}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:60:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |     for(int i = 0; i < block.size()-1; i++){
      |                    ~~^~~~~~~~~~~~~~~~

• Subtask 1: 25 / 25
• Subtask 2: 35 / 35
• Subtask 3: 40 / 40