// Remember...
#include<bits/stdc++.h>
#define F first
#define S second
#define PB push_back
#define sz(s) int((s).size())
#define bit(n,k) (((n)>>(k))&1)
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const int maxn=1e5+10,mod=1e9+7;
const ll inf=1e18;
double arr[2*maxn];
double a[maxn], b[maxn];
int main(){
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie();
int n; cin>>n;
for(int i=0;i<n;i++)
cin>>a[i]>>b[i];
sort(a,a+n), sort(b,b+n);
reverse(a,a+n), reverse(b,b+n);
for(int i=0;i<n;i++)
a[i]+= i==0 ? 0 : a[i-1], b[i]+= i==0 ? 0 : b[i-1], arr[2*i]=a[i], arr[2*i+1]= b[i];
sort(arr,arr+2*n);
int pta=0, ptb=0;
double ans=0;
for(int i=0;i<2*n;i++){
while(pta<n && arr[i]>a[pta]) pta++;
while(ptb<n && arr[i]>b[ptb]) ptb++;
if(arr[i] > min(a[n-1],b[n-1])) break;
ans=max(ans, arr[i] -pta -ptb -2);
}
return cout<<setprecision(4)<<fixed<<ans<<endl,0;
}
// Deathly mistakes:
// * Read the problem carefully.
// * Check maxn.
// * Overflows.
// #pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
376 KB |
Output is correct |
| 2 |
Correct |
3 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
3 ms |
380 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
376 KB |
Output is correct |
| 2 |
Correct |
3 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
3 ms |
380 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
376 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
376 KB |
Output is correct |
| 12 |
Correct |
3 ms |
420 KB |
Output is correct |
| 13 |
Correct |
3 ms |
376 KB |
Output is correct |
| 14 |
Correct |
3 ms |
348 KB |
Output is correct |
| 15 |
Correct |
3 ms |
380 KB |
Output is correct |
| 16 |
Correct |
3 ms |
376 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
376 KB |
Output is correct |
| 2 |
Correct |
3 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
3 ms |
380 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
376 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
376 KB |
Output is correct |
| 12 |
Correct |
3 ms |
420 KB |
Output is correct |
| 13 |
Correct |
3 ms |
376 KB |
Output is correct |
| 14 |
Correct |
3 ms |
348 KB |
Output is correct |
| 15 |
Correct |
3 ms |
380 KB |
Output is correct |
| 16 |
Correct |
3 ms |
376 KB |
Output is correct |
| 17 |
Correct |
104 ms |
3432 KB |
Output is correct |
| 18 |
Correct |
107 ms |
3496 KB |
Output is correct |
| 19 |
Correct |
118 ms |
3548 KB |
Output is correct |
| 20 |
Correct |
108 ms |
3576 KB |
Output is correct |
| 21 |
Correct |
112 ms |
3536 KB |
Output is correct |
| 22 |
Correct |
105 ms |
3580 KB |
Output is correct |
| 23 |
Correct |
105 ms |
3576 KB |
Output is correct |
| 24 |
Correct |
105 ms |
3492 KB |
Output is correct |
| 25 |
Correct |
110 ms |
3548 KB |
Output is correct |
| 26 |
Correct |
118 ms |
3448 KB |
Output is correct |
