Submission #929820

#	Time	Username	Problem	Language	Result	Execution time	Memory
929820		Whisper	Kisik (COCI19_kisik)	C++17	40 / 90	4 ms	8692 KiB

kisik

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

#define int long long
#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 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 = 1e3 + 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 numHouse, numFamily;
struct Data{
    int width, height;
    bool operator < (const Data& oth) const{
        return height < oth.height;
    }
} a[MAX];

int dp[MAX][MAX];

void Whisper(){
    cin >> numHouse >> numFamily;
    for (int i = 1; i <= numHouse; ++i){
        cin >> a[i].width >> a[i].height;
    }
    sort(a + 1, a + numHouse + 1);
    //dp(i, k) là tổng chiều sâu nhỏ nhất tính đến i khi đã chọn được k thằng

    memset(dp, 0x3f, sizeof dp);
    dp[0][0] = 0;
    for (int i = 1; i <= numHouse; ++i){
        for (int v = 0; v <= numFamily; ++v){
            dp[i][v] = dp[i - 1][v];
            if (v > 0){
                minimize(dp[i][v], dp[i - 1][v - 1] + a[i].width);
            }
        }
    }
    int ans = LINF;
    for (int i = 1; i <= numHouse; ++i){
        if (dp[i][numFamily] < LINF){
            minimize(ans, dp[i][numFamily] * a[i].height);
        }
    }
    cout << ans;
}


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

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10