#include <bits/stdc++.h>
//#define int long long
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
const int mod = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;
signed main() {
int n; cin >> n;
vector<double> a(n), b(n), pref(n);
for(int i=0; i<n; i++) cin >> a[i] >> b[i];
sort(a.rbegin(), a.rend());
sort(b.rbegin(), b.rend());
pref[0] = b[0];
for(int i=1; i<n; i++) pref[i] = pref[i-1] + b[i];
double ans = 0;
double sum1 = 0;
//sum1, i fixed
//(sum1 - i - 2) - j
//(sum2 - j) - (i - 2)
double l=0, r=1e9;
while(r - l > 1e-6) {
double mid = (l + r) / 2;
bool ok = 0;
double sum1 = 0;
for(int i=0; i<n&&!ok; i++) {
sum1 += a[i];
if(sum1 - i - 2 < mid) continue;
double tmp = (sum1 - i - 2) - mid;
int mx = tmp;
mx = min(mx, n-1);
if(pref[mx] - mx - i - 2 >= mid && sum1 - i - 2 - mx >= mid) ok = 1;
}
if(ok) ans = l = mid;
else r = mid;
}
cout << setprecision(4) << fixed << ans << '\n';
return 0;
}
Compilation message
sure.cpp: In function 'int main()':
sure.cpp:26:12: warning: unused variable 'sum1' [-Wunused-variable]
26 | double sum1 = 0;
| ^~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
348 KB |
Output is correct |
| 14 |
Correct |
1 ms |
444 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
348 KB |
Output is correct |
| 14 |
Correct |
1 ms |
444 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
348 KB |
Output is correct |
| 17 |
Correct |
67 ms |
3672 KB |
Output is correct |
| 18 |
Correct |
70 ms |
4148 KB |
Output is correct |
| 19 |
Correct |
68 ms |
3916 KB |
Output is correct |
| 20 |
Correct |
68 ms |
3928 KB |
Output is correct |
| 21 |
Correct |
75 ms |
4432 KB |
Output is correct |
| 22 |
Correct |
67 ms |
3932 KB |
Output is correct |
| 23 |
Correct |
76 ms |
4048 KB |
Output is correct |
| 24 |
Correct |
71 ms |
3916 KB |
Output is correct |
| 25 |
Correct |
72 ms |
3932 KB |
Output is correct |
| 26 |
Correct |
75 ms |
4300 KB |
Output is correct |
