Submission #828564

#	Time	Username	Problem	Language	Result	Execution time	Memory
828564		green_gold_dog	Self Study (JOI22_ho_t2)	C++17	0 / 100	80 ms	5056 KiB

Main

//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx,avx2,sse,sse2,sse3,ssse3,sse4,abm,popcnt,mmx")
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef double db;
typedef long double ldb;
typedef complex<double> cd;

constexpr ll INF64 = 9'000'000'000'000'000'000, INF32 = 2'000'000'000, MOD = 1'000'000'007;
constexpr db PI = acos(-1);
constexpr bool IS_FILE = false, IS_TEST_CASES = false;

random_device rd;
mt19937 rnd32(rd());
mt19937_64 rnd64(rd());

template<typename T>
bool assign_max(T& a, T b) {
        if (b > a) {
                a = b;
                return true;
        }
        return false;
}

template<typename T>
bool assign_min(T& a, T b) {
        if (b < a) {
                a = b;
                return true;
        }
        return false;
}

template<typename T>
T square(T a) {
        return a * a;
}

template<>
struct std::hash<pair<ll, ll>> {
        ll operator() (pair<ll, ll> p) const {
                return ((__int128)p.first * MOD + p.second) % INF64;
        }
};

void solve() {
        ll n, m;
        cin >> n >> m;
        vector<ll> a(n), b(n);
        for (ll i = 0; i < n; i++) {
                cin >> a[i];
        }
        for (ll i = 0; i < n; i++) {
                cin >> b[i];
        }
        ll l = 0, r = INF64;
        while (r - l > 1) {
                ll mid = (l + r) / 2;
                ll nc = 0;
                for (ll i = 0; i < n; i++) {
                        ll need = mid;
                        if (a[i] > b[i]) {
                                ll can = min(m, (need + a[i] - 1) / a[i]);
                                need -= can * a[i];
                                nc += can;
                        }
                        if (need) {
                                nc += (need + b[i] - 1) / b[i];
                        }
                }
                if (nc <= n * m) {
                        l = mid;
                } else {
                        r = mid;
                }
        }
        cout << l << '\n';
}

int main() {
        if (IS_FILE) {
                freopen("", "r", stdin);
                freopen("", "w", stdout);
        }
        ios_base::sync_with_stdio(false);
        cin.tie(0);
        cout.tie(0);
        ll t = 1;
        if (IS_TEST_CASES) {
                cin >> t;
        }
        for (ll i = 0; i < t; i++) {
                solve();
        }
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:86:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   86 |                 freopen("", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~
Main.cpp:87:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   87 |                 freopen("", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 25
• Subtask 3: 0 / 27
• Subtask 4: 0 / 29
• Subtask 5: 0 / 9