Submission #1223790

#	Time	Username	Problem	Language	Result	Execution time	Memory
1223790		spetr	Tricks of the Trade (CEOI23_trade)	C++20	55 / 100	1113 ms	2162688 KiB

trade

#include <bits/stdc++.h>
#include <cmath>
using namespace std;

#define ll long long
const ll mmod = 998244353;  
#define vl vector<long long>
#define vll vector<vector<long long>>

ll n,k;
vll dp;
vector<vector<bool>> visited;
vl in;
vl out;
vl used;

void rekurze(ll i, ll j){
    if (i == 0 || j == 0) return;

    if (visited[i][j] == false){
        visited[i][j] = true;

        if (dp[i][j] == dp[i-1][j] - in[i-1]){
            rekurze(i-1, j);
        }

        if (dp[i][j] == dp[i-1][j-1] - in[i-1] + out[i-1]){
            rekurze(i-1, j-1);
            used[i-1] = 1;
        }
        
    }
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    ll n,k;
    cin >> n >>k;

    dp.resize(n+1, vl (k+1, -1e18));
    visited.resize(n+1, vector<bool> (k+1, false));


    for (ll i = 0; i < n; i++){ll num; cin >> num; in.push_back(num);}
    for (ll i = 0; i < n; i++){ll num; cin >> num; out.push_back(num);}

    for (ll i = 0; i<n; i++) dp[i][0] = 0;

    for (ll i = 1; i <n+1; i++){
        for (ll j = 1; j < k+1; j++){
            dp[i][j] = max(dp[i-1][j] - in[i-1], dp[i-1][j-1] - in[i-1] + out[i-1]);
        }
    }

    ll ans = -1e18;
    for (ll i = 1; i < n+1; i++) ans = max(ans, dp[i][k]);
    cout << ans <<"\n";

    used.resize(n, 0);
    for (ll i = 1; i < n+1; i++){
        if (dp[i][k] == ans){
            rekurze(i,k);
        }
    }

    for (ll i = 0; i < n; i++){cout << used[i];}
   
    return 0;
}

• Subtask 0: 0 / 0
• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 25 / 25
• Subtask 5: 0 / 45