Submission #524006

#	Time	Username	Problem	Language	Result	Execution time	Memory
524006		Nursik	Money (IZhO17_money)	C++14	0 / 100	0 ms	332 KiB

money

#include <bits/stdc++.h>

#define pb push_back
#define ll long long
#define ld long double
#define f first
#define s second
#define mp make_pair

const ll maxn = 1e6 + 1, maxm = 3e5 + 1,  maxk = 61;
const ll inf = 1000000000, mod = inf + 7, mod2 = 998244353;
const ll pa = 31, block = 400;

using namespace std;

int n;
int a[maxn], f[maxn];
void upd(int pos, int val){
    for (int i = pos; i <= 1e6; i |= (i + 1)){
        f[i] += val;
    }
}
int get(int pos){
    int res = 0;
    for (int i = pos; i >= 1; i = (i & (i + 1)) - 1){
        res += f[i];
    }
    return res;
}
int main(){
    cin >> n;
    for (int i = 1; i <= n; ++i){
        cin >> a[i];
    }
    int pos = 1, ans = 0;
    vector<int> v;
    v.pb(0), v.pb(inf);
    while (pos <= n){
        int mx = 0, mn = inf, answ = pos;;
        for (int j = pos; j <= n; ++j){
            if ((j == pos) || (j - 1 >= pos && a[j] >= a[j - 1])){
                mx = max(mx, a[j]);
                mn = min(mn, a[j]);
                int range = get(mx - 1) - get(mn + 1);
                range = max(range, 0);
                if (range == 0){
                    answ = j;
                }
                else{
                    break;
                }
            }
            else{
               // cout << a[j] << " " << a[j - 1] << '\n';
                break;
            }
        }
        ans++;
        mn = inf, mx = 0;
        for (int j = pos; j <= answ; ++j){
            mn = min(mn, a[j]);
            mx = max(mx, a[j]);
            upd(a[j], 1);
        }
        for (int k = 0; k < v.size() - 1; ++k){
            if (v[k] <= mn && mx <= v[k + 1]){
                vector<int> nw;
                for (int i = 0; i <= k; ++i){
                    nw.pb(v[i]);
                }
                for (int j = pos; j <= answ; ++j){
                    nw.pb(a[j]);
                }
                for (int i = k + 1; i < v.size(); ++i){
                    nw.pb(v[i]);
                }
                v = nw;
                break;
            }
        }
        pos = answ + 1;
    }
    cout << ans;
}

Compilation message (stderr)

money.cpp: In function 'int main()':
money.cpp:65:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |         for (int k = 0; k < v.size() - 1; ++k){
      |                         ~~^~~~~~~~~~~~~~
money.cpp:74:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |                 for (int i = k + 1; i < v.size(); ++i){
      |                                     ~~^~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 20
• Subtask 4: 0 / 55