oj.uz

Submission #726850

# Submission time Handle Problem Language Result Execution time Memory
726850 2023-04-19T12:40:01 Z penguin133 Sure Bet (CEOI17_sure) C++17
100 / 100
 110 ms 6732 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

long double A[100005], B[100005], P[100005];

void solve(){
	int n; cin >> n;
	for(int i=1;i<=n;i++)cin >> A[i] >> B[i];
	sort(A+1, A+n+1);
	sort(B+1, B+n+1);
	for(int i=n;i>=1;i--)P[i] = P[i+1] + B[i];
	long double ans = 0, cur = 0;
	for(int i=n;i>=1;i--){
		long double cur2 = 0;
		cur += A[i];
		int lo = 1, hi = n, brr = n + 1;
		while(lo <= hi){
			int mid = (lo + hi) >> 1;
			long double crr = min(cur, P[mid]) - (n - i + 1 + n - mid + 1);
			long double drr = min(cur, P[mid-1]) - (n - i + 1 + n - mid + 2);
			if(crr <= drr)brr = mid, hi = mid - 1;
			else lo = mid + 1;
			ans = max({ans, crr, drr});
		}
		
	}
	cout << fixed << setprecision(4) << ans;
}

main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int tc = 1;
	//cin >> tc;
	for(int tc1=1;tc1<=tc;tc1++){
		// cout << "Case #" << tc1 << ": ";
		solve();
	}
}

Compilation message

sure.cpp: In function 'void solve()':
sure.cpp:24:15: warning: unused variable 'cur2' [-Wunused-variable]
   24 |   long double cur2 = 0;
      |               ^~~~
sure.cpp:26:23: warning: variable 'brr' set but not used [-Wunused-but-set-variable]
   26 |   int lo = 1, hi = n, brr = n + 1;
      |                       ^~~
sure.cpp: At global scope:
sure.cpp:40:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   40 | main(){
      | ^~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 2 ms 340 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 2 ms 340 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 2 ms 340 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 110 ms 5012 KB Output is correct
18 Correct 100 ms 6380 KB Output is correct
19 Correct 99 ms 6480 KB Output is correct
20 Correct 97 ms 6384 KB Output is correct
21 Correct 106 ms 6732 KB Output is correct
22 Correct 102 ms 6256 KB Output is correct
23 Correct 99 ms 6348 KB Output is correct
24 Correct 108 ms 6344 KB Output is correct
25 Correct 103 ms 6436 KB Output is correct
26 Correct 108 ms 6732 KB Output is correct