Submission #1099283

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099283		vjudge1	Kitchen (BOI19_kitchen)	C++14	0 / 100	1 ms	1884 KiB

kitchen

#include <bits/stdc++.h>

#define nl "\n"
#define no "NO"
#define yes "YES"
#define fi first
#define se second
#define vec vector
#define task "main"
#define _mp make_pair
#define ii pair<int, int>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define evoid(val) return void(std::cout << val)
#define FOR(i, a, b) for(int i = (a); i <= (b); ++i)
#define FOD(i, b, a) for(int i = (b); i >= (a); --i)
#define unq(x) sort(all(x)); x.resize(unique(all(x)) - x.begin())

using namespace std;

template<typename U, typename V> bool maxi(U &a, V b) {
    if (a < b) { a = b; return 1; } return 0;
}
template<typename U, typename V> bool mini(U &a, V b) {
    if (a > b or a == -1) { a = b; return 1; } return 0;
}

const int N = (int)300 + 9;
const int mod = (int)1e9 + 7;

void prepare(); void main_code();

int main() {
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    if (fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    const bool MULTITEST = 0; prepare();
    int num_test = 1; if (MULTITEST) cin >> num_test;
    while (num_test--) { main_code(); }
}

void prepare() {};

int a[N], b[N];

long long dp[2][N][N];

void main_code() {
    int n, m, k; cin >> n >> m >> k;
    for(int i = 1; i <= n; ++i) cin >> a[i];
    for(int i = 1; i <= m; ++i) cin >> b[i];
    memset(dp, -1, sizeof dp);
    // build k tang
    if (*min_element(a + 1, a + n + 1) < k)
        evoid("Impossible");
    long long s = 0;
    FOR(i, 1, m) s += b[i];
    FOR(i, 1, n) s -= a[i];
    if (s < 0) evoid("Impossibe");
    s = 0;
    FOR(i, 1, n) s += a[i] - k;
    memset(dp, -1, sizeof dp);
    // sum thua nho
    dp[0][0][0] = 0;
    for(int c = 0; c < m; ++c) {
        bool s = c & 1;
        for(int layer = 0; layer < k; ++layer)
        for(int r = 0; r <= n; ++r) if (dp[s][layer][r] != -1) {
            long long &v = dp[s][layer][r];
            mini(dp[s ^ 1][layer][r], v);
            if (r == n) {
                mini(dp[s ^ 1][layer + 1][0], v);
                continue ;
            }
//            cerr << c << ' ' << layer << ' ' << r << ' ' << v << nl;
            // neu pick chef c
            // build duoc layer tang
            if (r + b[c + 1] <= n) {
                mini(dp[s ^ 1][layer][r + b[c + 1]], v);
            } else if (b[c + 1] >= n) {
                // build duoc the mot layer
                mini(dp[s ^ 1][layer + 1][r], v + b[c + 1] - n);
            } else {
                mini(dp[s ^ 1][layer + 1][(r + b[c + 1]) % n], v);
            }
            v = -1;
        }
    }
    long long ans = -1;
    for(int r = 0; r <= n; ++r)
    if (dp[m & 1][k][r] != -1) {
        long long v = dp[m & 1][k][r] + r;
//        cerr << k << ' ' << r << ' ' << v << nl;
        if (v >= s)
        mini(ans, v - s);
    }
    if (ans == -1)
        evoid("Impossible");

    cout << ans;
}


/*     Let the river flows naturally     */

Compilation message (stderr)

kitchen.cpp: In function 'int main()':
kitchen.cpp:36:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
kitchen.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 22
• Subtask 3: 0 / 20
• Subtask 4: 0 / 21
• Subtask 5: 0 / 28