// 還要更強
#include<iostream>
#include<queue>
#include<set>
#include<map>
#include<iomanip>
#include<math.h>
#include<cstring>
#include<stack>
#include<string.h>
#include<random>
#include<algorithm>
#include<vector>
#define ll long long
#define FOR(i,a,b) for(ll i=a;i<b;i++)
#define REP(i,a,b) for(int i=a;i>=b;i--)
#define INF (ll)(2e18)
#define pb push_back
#define F first
#define S second
using namespace std;
ll n,m;
ll A[300005],B[300005];
bool check(ll x){
ll res=0;
FOR(i,0,n){
ll tmp=x;
if(1ll*A[i]<tmp){
tmp-=A[i];
if(tmp<0){
assert(1);
}
res-=tmp/B[i]+(tmp%B[i]?1:0);
}
else{
ll used=(tmp-1)/A[i]+1;
res+=m-used;
}
}
if(res>=0) return 1;
return 0;
}
signed main(){
cin>>n>>m;
FOR(i,0,n){
cin>>A[i];
}
FOR(i,0,n){
cin>>B[i]; A[i]=max(A[i],B[i]);
}
ll l=0,r=(1e18+1),ans=0;
while(l<r){
ll mid=(l+r)>>1;
if(check(mid)){
ans=max(ans,mid); l=mid+1;
}
else{
r=mid;
}
}
cout<<ans<<endl;
}
Compilation message
Main.cpp: In function 'bool check(long long int)':
Main.cpp:35:17: error: 'assert' was not declared in this scope
35 | assert(1);
| ^~~~~~
Main.cpp:13:1: note: 'assert' is defined in header '<cassert>'; did you forget to '#include <cassert>'?
12 | #include<algorithm>
+++ |+#include <cassert>
13 | #include<vector>
