Submission #915668

#	Time	Username	Problem	Language	Result	Execution time	Memory
915668		Whisper	Skyline (IZhO11_skyline)	C++17	0 / 100	82 ms	100956 KiB

skyline

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;
using T = tuple<ll, ll, ll>;

#define int long long
#define Base 41
#define sz(a) (int)a.size()
#define FOR(i, a, b) for ( int i = a ; i <= b ; i++ )
#define FORD(i, a, b) for (int i = b; i >= a; i --)
#define REP(i, n) for (int i = 0; i < n; ++i)
#define REPD(i, n) for (int i = n - 1; i >= 0; --i)
#define all(x) x.begin() , x.end()
#define pii pair<int , int>
#define fi first
#define se second
#define Lg(x) 31 - __builtin_clz(x)

#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)

constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int MAX = 200 + 5;
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void setupIO(){
    #define name "Whisper"
    //Phu Trong from Nguyen Tat Thanh High School for gifted student
    srand(time(NULL));
    cin.tie(nullptr)->sync_with_stdio(false); cout.tie(nullptr);
    //freopen(name".inp", "r", stdin);
    //freopen(name".out", "w", stdout);
    cout << fixed << setprecision(10);
}

template <class X, class Y>
    bool minimize(X &x, const Y &y){
        X eps = 1e-9;
        if (x > y + eps) {x = y; return 1;}
        return 0;
    }

template <class X, class Y>
    bool maximize(X &x, const Y &y){
        X eps = 1e-9;
        if (x + eps < y) {x = y; return 1;}
        return 0;
    }
int N;
int a[MAX];

int dp[305][MAX][MAX];
//dp(i, h1, h2) xét đến vị trí i độ dài của (i - 1) và (i - 2) còn dư lại là h1 và h2

int f(int pos, int h1, int h2){
    if (pos > N){
        return min(h1, h2) * 5 + (max(h1, h2) - min(h1, h2)) * 3;
    }
    int &res = dp[pos][h1][h2];
    if (~res) return res;
    res = LINF;
    int minHeight = min({h1, h2, a[pos]});
    if (minHeight == h2){
        minimize(res, f(pos + 1, a[pos] - h2, h1 - h2) + h2 * 7);
    }
    if (min(h1, h2) > 0){
        minimize(res, f(pos, h1 - 1, h2 - 1) + 5);
    }
    if (h2){
        minimize(res, f(pos, h1, h2 - 1) + 3);
    }
    return res;
}
void Whisper(){
    cin >> N;
    for (int i = 1; i <= N; ++i) cin >> a[i];
    //nhận xét 1: càng sơn nhiều thằng 1 lúc càng tối ưu
    memset(dp, -1, sizeof dp);
    cout << f(3, a[2], a[1]);
}


signed main(){
    setupIO();
    int Test = 1;
//    cin >> Test;
    for ( int i = 1 ; i <= Test ; i++ ){
        Whisper();
        if (i < Test) cout << '\n';
    }
}

• Subtask 1: 0 / 100