Submission #1239763

#	Time	Username	Problem	Language	Result	Execution time	Memory
1239763		M_SH_O	Group Photo (JOI21_ho_t3)	C++20	0 / 100	0 ms	324 KiB

Main

/*#pragma GCC optimize("O3")
#pragma GCC optimization("Ofast,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")*/
#include <bits/stdc++.h>
/*#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>*/

#define ll long long
#define ll1 long long
#define ull unsigned long long
#define dou long double
#define str string
#define vll vector<ll>
#define vi vector<int>
#define pll pair<ll, ll>
#define vpll vector<pll>
#define vbool vector<bool>
#define vstr vector<str>
#define vvll vector<vll>
#define pb push_back
#define pf push_front
#define endl "\n"
#define fr first
#define se second
// #define sortcmp(a) sort(a.begin(), a.end(), cmp)
#define sort(a) sort(a.begin(), a.end())
#define reverse(a) reverse(a.begin(), a.end())
#define speed ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define INF 1000000000000000007
#define ordered_set tree<ll, null_type, less_equal<ll>, rb_tree_tag, tree_order_statistics_node_update>

using namespace std;
//using namespace __gnu_pbds;

mt19937 rng(time(0));
ll randll(ll l, ll r) {
    return uniform_int_distribution<ll>(l, r)(rng);
}

int main(){
    speed;
    srand(time(0));
    ll n, m;
    cin >> n;
    vll a(n);
    for (int i =0 ; i < n ;i ++) {
        cin >> a[i];
    }
    vll b;
    b.pb(a[0]);
    ll res = 0;
    for (int i = 1; i < n; i ++) {
        ll x = -1;
        for (int j = b.size()-1; j >= 0; j --) {
            if (b[j] < a[i]+2) {
                x = j;
                break;
            }
        }
        res += b.size()-1-x;
        vll c;
        if (x == -1) c.pb(a[i]);
        for (int j = 0; j < b.size(); j ++) {
            c.pb(b[j]);
            if (j == x) c.pb(a[i]);
        }
        b = c;
    }
    cout << res << endl;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 32
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36