Submission #703598

#	Time	Username	Problem	Language	Result	Execution time	Memory
703598		niter	Self Study (JOI22_ho_t2)	C++14	100 / 100	213 ms	5120 KiB

Main

#include <iostream>
#include <vector>
#define loop(i,a,b) for(int i=a;i<b;i++)
using namespace std;
long long A[300050], B[300050];

int main(){
    ios::sync_with_stdio(false); cin.tie(0);
    long long N, M;
    cin >> N >> M;
    loop(i,0,N) cin >> A[i];
    loop(i,0,N) cin >> B[i];
    loop(i,0,N) A[i] = max(A[i], B[i]);

    long long ok = 0, ng = 1LL << 60;
    auto check = [&](long long x) -> bool {
        long long day = 0;
        loop(i,0,N){
            if(x <= A[i] * M) day += (x - 1) / A[i] + 1;
            else day += M + (x - A[i] * M - 1) / B[i] + 1;
            if(day > N * M) return 0;
        }
        return 1;
    };
    while(ng - ok > 1){
        long long mid = (ng + ok) / 2;
        if(check(mid)) ok = mid;
        else ng = mid;
    }
    cout << ok << endl;
    return 0;
}

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