Submission #1101225

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101225		bvv23	Baloni (COCI15_baloni)	C++17	100 / 100	37 ms	7752 KiB

baloni

// Ahmadov orz
/// successful failure
#include <bits/stdc++.h>
/// #include <ext/pb_ds/assoc_container.hpp>
using namespace std;
/// using namespace __gnu_pbds;
#define int long long
#define pb push_back
#define pii pair<int, int>
#define all(v) v.begin(),v.end()
#define ff first
#define ss second
#define drop(x) cout<<x<<endl;return
// template <class T>
// using isTree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

/// sometimes you gotta think simple
struct custom_hash {
    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        x ^= FIXED_RANDOM;
        return x ^ (x >> 16);
    }
};
const int N = 1e6 + 7;
int vis[N];
void failure()
{
    int n;
    cin >> n;
    vector <int> arr(n);
    //map <int,int> mp;
    for (int i = 0; i < n; i++) {
        cin >> arr[i];
    }
    int ans = 0;
    for (int i = 0; i < n; i++) {
        if (vis[arr[i]]) {
            vis[arr[i]]--;
        }
        else {
            ans++;
        }
        vis[arr[i] - 1]++;
    }
    drop(ans);
}
signed main() { 
    ios_base::sync_with_stdio(0); 
    cin.tie(NULL);                
    cout.tie(NULL);
    int tt = 1;
    //cin >> tt;
    while (tt--)
    {
        failure();
    }
}

• Subtask 1: 100 / 100