Submission #937900

#	Time	Username	Problem	Language	Result	Execution time	Memory
937900		Litusiano	Self Study (JOI22_ho_t2)	C++17	0 / 100	429 ms	7468 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define endl "\n"
 
vector<pair<int,int>> v;
int n,m;
bool check(int mid){
	vector<int> need(n,0);
	int left = 0; int tot = 0;
	for(int i = 0; i<n; i++){
		int z = max(v[i].first, v[i].second); // a la clase i, estudio o hi vaig
		int k = (mid+z-1)/z; // numero de veces que tengo que estudiar o ir 
		if(k >= m) tot+=m, need[i] = max(0ll,mid-(m * z)); // quan em falta per aprobar
		else tot+=k; // classes que mhan sobrat
	}
	for(int i = 0; i<n; i++){
		if(need[i] <= 0) continue;
		tot += max(0ll,(need[i] + v[i].second - 1)/v[i].second);	
	}
	return tot<=n*m;
}
 
signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin>>n>>m;
	v.assign(n,{0,0});
	for(auto& x : v) cin>>x.first; //a
	for(auto& x : v) cin>>x.second; //b
	int l = 1; int r = 1e18;
	while(r > l+1){
		int mid = (l+r)/2;
		if(check(mid)) l = mid;
		else r = mid;
	}
	cout<<l<<endl;
}

Compilation message (stderr)

Main.cpp: In function 'bool check(long long int)':
Main.cpp:10:6: warning: unused variable 'left' [-Wunused-variable]
   10 |  int left = 0; int tot = 0;
      |      ^~~~

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