Submission #1312145

#	Time	Username	Problem	Language	Result	Execution time	Memory
1312145		cubed	Self Study (JOI22_ho_t2)	C++20	100 / 100	97 ms	6064 KiB

Main

#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define yes cout<<"YES\n"
#define no cout<<"NO\n"
#define endl '\n'
#define f first
#define s second
#define pb(x) push_back(x)
#define int long long
 
const int MOD = 1e9+7;
const int inf =1e9;
const ll INF = 1e18;
const ll INV2 = 500000004;

class DSU {
    vector<int> parent, size;
public:
    DSU(int n) {
        parent.resize(n+1);
        size.resize(n+1);
        for (int i=0; i<=n; i++) {
            parent[i]=i;
            size[i]=1;
        }
    }

    int find (int node) {
        if (node==parent[node]) return node;
        return parent[node]=find(parent[node]);
    }

    void unite (int u, int v) {
        int pv=find(v);
        int pu=find(u);

        if (pv==pu) return;
        if (size[pu]<size[pv]) swap(pu, pv);

        parent[pv]=pu;
        size[pu]+=size[pv];
    }

    int getsize (int node) {
        return size[find(node)];
    }
};

ll getsqrt(ll x) {
    ll val = sqrtl(x) + 2;
    while (val * val > x) val--;
    return val;
}

bool safe (int i, int j, int n, int m) {
    if (i<0 || j<0 || i>=n || j>=m) return false;
    return true;
}

ll gcd(ll a, ll b) {
    while (b != 0) {
        ll temp=b;
        b=a%b;
        a=temp;
    }
    return a;
}

ll lcm(ll a, ll b) {
    return a / gcd(a, b)*b;
}

vector<int> dx={-1, 0, 1, 0};
vector<int> dy={0, 1, 0, -1};

// SOLUTION STARTS FROM HERE //

bool check (int x, int n, int m, vector<int> &a, vector<int>&b) {
    int tn = 0;
    int ta = n*m;

    for (int i=0; i<n; i++) {
        int slots =0;
        int best = max(a[i], b[i]);

        if (x<=m*best) {
            slots = (x+best-1)/best;
        } else {
            int rem = x-m*best;
            slots = m+(rem+b[i]-1)/b[i];
        }

        tn+=slots;
        if (tn>ta) return false;
    }

    return tn<=ta;
}

void solve() {
    int n, m;
    cin>>n>>m;

    vector<int> a(n);
    for (int i=0; i<n; i++) {
        cin>>a[i];
    }

    vector<int> b(n);
    for (int i=0; i<n; i++) {
        cin>>b[i];
    }

    int l=0, r=1e18;
    int ans=0;

    while (l<=r) {
        int mid = l+(r-l)/2;

        if (check(mid, n, m, a, b)) {
            ans=max(ans, mid);
            l=mid+1;
        } else {
            r=mid-1;
        }
    }

    cout<<ans<<endl;

    // m=1, only one weak 

    /*
    for subject i, if he studies ith subject in class x times
    and by himself y times then his score will be:

    x[i]*a[i] + y[i]+b[i]; we need to maximise the minimum value
    of this 
    */
    
}

bool multi=false;

int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
   
    //freopen("convention2.in", "r", stdin);
	//freopen("convention2.out", "w", stdout);

    int t=1;
    if (multi) cin>>t;
 
    while (t--) solve();
 
    return 0;
}

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