Submission

[PPP][PPPPPP][PP]

Score: 100

User: Dormon

Problemset: ช่างไฟ

Language: cpp

Time: 0.096 second

Submitted On: 2025-01-03 14:01:16

#include <iostream>
#include <cstdint>
#include <cstring>
#include <vector>
#include <algorithm>
#include <functional>
#include <queue>
#include <numeric>
#include <array>
#include <iomanip> // cout << fixed << setprecision(n);

#define debug(...) Debug(#__VA_ARGS__, __VA_ARGS__)
using namespace std;
const bool TEST_CASE = 0;

template<typename T>
typename std::enable_if<std::is_integral<T>::value>::type
Debug(const char* name, T value) {
    std::cout << name << " : " << value << '\n';
}

template<typename T, typename... Args>
typename std::enable_if<std::is_integral<T>::value>::type
Debug(const char* names, T value, Args... args) {
    const char* comma = strchr(names, ',');
    std::cout.write(names, comma - names) << " : " << value << " | ";
    Debug(comma + 1, args...);
}
template<typename T> ostream& operator<<(ostream& out, vector<T>& a) {
    for(auto &x : a) out << x << ' '; 
    return out;
};

const int64_t inf = 1e18;

void solve(){
    int n;
    cin >> n;
    vector<array<int64_t, 4>> dp(n+1, {inf, -inf, inf, -inf});
    dp[0] = {0, 0, 0, 0};
    for (int i = 1;i <= n;i++){
        int e;
        cin >> e;
        for (int j = 0;j < 4;j++){
            dp[i][0] = min(dp[i][0], dp[i-1][j] + e);
            dp[i][1] = max(dp[i][1], dp[i-1][j] + e);
            dp[i][2] = min(dp[i][2], abs(dp[i-1][j] + e));
            dp[i][3] = max(dp[i][3], abs(dp[i-1][j] + e));
        }
    }
    cout << max({dp[n][0], dp[n][1], dp[n][2], dp[n][3]}) << '\n';
}

int main()
{
    #ifndef DORMON
        ios_base::sync_with_stdio(false); 
    #endif
    cin.tie(0);
    int q = 1; 
    if (TEST_CASE) cin >> q;
    while (q--){
        solve();
    }
}