Submission #843565

#	Time	Username	Problem	Language	Result	Execution time	Memory
843565		Cookie	Constellation 3 (JOI20_constellation3)	C++14	0 / 100	1 ms	6492 KiB

constellation3

#include<bits/stdc++.h>
#include<fstream>
#pragma GCC optimize("Ofast,O3,unroll-loops")
#pragma GCC target("avx2")
using namespace std;
//ifstream fin("FEEDING.INP");
//ofstream fout("FEEDING.OUT");
#define sz(a) (int)a.size()
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>

const int mxn = 2505;
const ll inf = 1e18, mod = 1e9 + 7;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
int n, m;
vt<pll>comp[mxn + 1];
ll a[mxn + 1], dp[2005][2005];
signed main()
{
     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n;
    for(int i = 1; i <= n; i++)cin >> a[i];
    cin >> m;
    ll cost = 0;
    for(int i = 0; i < m; i++){
        int x, y, c; cin >> x >> y >> c;
        cost += c;
        comp[x].pb({y, c});
    }
    ll res = 0;
    for(int i = 0; i < sz(comp[1]); i++){
        dp[1][i] = comp[1][i].se;
        res = max(res, dp[1][i]);
    }
    
    for(int i = 2; i <= n; i++){
        int idd = 0;
        for(auto [y, v]: comp[i]){
            dp[i][idd] = v;
           ll mx = a[i];
            for(int j = i - 1; j >= 1; j--){
                mx = max(mx, a[j]);
                for(int k = 0; k < sz(comp[j]); k++){
                    if(comp[j][k].first <= mx || y <= mx){
                        dp[i][idd] = max(dp[i][idd], dp[j][k] + v);
                    }
                }
            }
            res = max(res, dp[i][idd]);
            idd++;
        }
    }
    cout << cost - res;
    return(0);
}

Compilation message (stderr)

constellation3.cpp: In function 'int main()':
constellation3.cpp:48:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   48 |         for(auto [y, v]: comp[i]){
      |                  ^

• Subtask 1: 0 / 14
• Subtask 2: 0 / 21
• Subtask 3: 0 / 65