Submission #1139801

#	Time	Username	Problem	Language	Result	Execution time	Memory
1139801		Shadow1	Airplane (NOI23_airplane)	C++20	0 / 100	28 ms	3396 KiB

Main

// Programmer: Shadow1

#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
using namespace std;

using ll = long long;
using ld = long double;
using ull = unsigned long long;
using str = string; // yay python!

#define i64 int64_t
#define show(x) cerr << (#x) << " = " << (x) << '\n';
#define output_vector(v) for(auto &x : v){cout << x << ' ';}cout << '\n';
#define output_pairvector(v) for(auto &x : v){cout << x.first << " " << x.second << '\n';}
#define read_vector(v) for(auto &x : v){cin >> x;}
#define vt vector
#define prq priority_queue
#define pb push_back
#define eb emplace_back
#define pii pair<int,int>
#define fir first
#define sec second
#define sz(x) ll(x.size())
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define int long long
#define discretize(x) sort(x.begin(), x.end()); x.erase(unique(x.begin(), x.end()), x.end());
// 
//

void solve() {  
    int n, m;
    cin >> n >> m;
    vector<int> a(n+1), p(n+1);
    for(int i=1; i<=n; ++i)
        cin >> a[i];
    for(int i=0; i<m; ++i) {
        int u, v;
        cin >> u >> v;
    }
    vector<bool> skip(n+1);
    for(int i=1; i<=n; ++i)
        p[i] = max(p[i-1], a[i]);
    int mx = 0, ind = 0;
    for(int i=n-1; i>=2; --i) {
        if(p[i-1] > a[i] && mx > a[i]) skip[i] = true;
        mx = max(mx, a[i]);
    }
    vector<pii> v;
    for(int i=1; i<=n; ++i) {
        if(!skip[i]) {
            v.push_back({a[i], i});
        }
    }
    int ans = 0;
    int curr = 0;
    for(int i=1; i<sz(v); ++i) {
        int old = curr;
        curr = max(curr - (v[i].sec - v[i-1].sec), v[i].fir);
        ans += max(v[i].sec - v[i-1].sec, abs(old - curr));
    }
    ans += curr;
    cout << ans << '\n';

}







// CHECK YOUR OVERFLOWS!!!! 
signed main() {
    // freopen("output.txt", "w", stdout);
    // freopen("input.txt", "r", stdin);
    ios::sync_with_stdio(false);
    cin.tie(NULL); 
    int T = 1;
    // cin >> T;
    for(int tc = 1; tc <= T; ++tc) {
        // cout << "Case #" << tc << ": ";
        solve();
    }

    return 0;
}

• Subtask 1: 0 / 22
• Subtask 2: 0 / 10
• Subtask 3: 0 / 31
• Subtask 4: 0 / 37