Submission #1084153

#	Time	Username	Problem	Language	Result	Execution time	Memory
1084153		TrinhKhanhDung	Baloni (COCI15_baloni)	C++14	100 / 100	66 ms	35408 KiB

baloni

#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define sz(x) (int)x.size()
#define ALL(v) v.begin(),v.end()
#define MASK(k) (1LL << (k))
#define BIT(x, i) (((x) >> (i)) & 1)
#define oo (ll)1e18
#define INF (ll)1e9
#define MOD (ll)(998244353)

using namespace std;

template<class T1, class T2>
    bool maximize(T1 &a, T2 b){if(a < b){a = b; return true;} return false;}

template<class T1, class T2>
    bool minimize(T1 &a, T2 b){if(a > b){a = b; return true;} return false;}

template<class T1, class T2>
    void add(T1 &a, T2 b){a += b; if(a >= MOD) a -= MOD;}

template<class T1, class T2>
    void sub(T1 &a, T2 b){a -= b; if(a < 0) a += MOD;}

template<class T>
    void cps(T &v){sort(ALL(v)); v.resize(unique(ALL(v)) - v.begin());}

void solve(){
    int n; cin >> n;
    vector<int> a(n + 3, 0);
    vector<vector<int>> pos((int)1e6 + 10);
    for(int i=1; i<=n; i++){
        cin >> a[i];
        pos[a[i]].push_back(i);
    }
    int ans = n;
    for(int i=n; i>=1; i--){
        if(sz(pos[a[i] + 1]) > 0){
            pos[a[i] + 1].pop_back();
            ans--;
        }
        if(sz(pos[a[i]]) && pos[a[i]].back() == i) pos[a[i]].pop_back();
    }
    cout << ans << '\n';
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    // freopen("flowers.inp", "r", stdin);
    // freopen("flowers.out", "w", stdout);

    int nTest = 1;
//    cin >> nTest;
    while(nTest--)
        solve();

    return 0;
}

• Subtask 1: 100 / 100