oj.uz

Submission #896219

# Submission time Handle Problem Language Result Execution time Memory
896219 2024-01-01T03:01:32 Z thunopro Balloons (CEOI11_bal) C++14
40 / 100
 2000 ms 6504 KB 
#include<bits/stdc++.h>
using namespace std ; 
#define ll long long 
#define maxn 200009 
#define fi first 
#define se second 
#define pb push_back 
#define left id<<1 
#define right id<<1|1 
#define re exit(0); 
#define _lower(x) lower_bound(v.begin(),v.end(),x)-v.begin()+1  

const int mod = 1e9+7 ; 
const int INF = 1e9 ; 
const int LOG = 18 ; 

typedef vector<int> vi ; 
typedef pair<int,int> pii ; 
typedef vector<ll> vl ; 
typedef vector<pii> vii ; 
 
void add ( int &a , int b ) 
{
	a += b ;
	if ( a < 0 ) a += mod ; 
	if ( a >= mod ) a -= mod ; 
}

template < typename T > void chkmin ( T &a , T b ) { if ( a > b ) a = b ; } 
template < typename T > void chkmax ( T &a , T b ) { if ( a < b ) a = b ; } 

void rf () 
{
	freopen ("bai1.inp","r",stdin) ; 
//	freopen ("bai1.out","w",stdout) ; 
}

int _pow ( int a , int n ) 
{
	if ( n == 0 ) return 1 ; 
	int res = _pow (a,n/2) ; 
	if ( n % 2 ) return 1ll*res*res%mod*a%mod ; 
	else return 1ll*res*res%mod ; 
}

int n ; 
pair<int,double> a [maxn] ; 

double sqr ( double x ) 
{
	return x*x ; 
}

int main () 
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);cout.tie(0) ; 
//	rf () ; 
	
	cin >> n ; 
	for ( int i = 1 ; i <= n ; i ++ ) cin >> a[i].fi >> a[i].se ;
	
	for ( int i = 1 ; i <= n ; i ++ ) 
	{
		double l = 0 , r = a [i].se ;
		int q = 50 ; 
		while ( q -- ) 
		{
			double mid = (l+r)/2 ; 
			bool ok = true ; 
			for ( int j = 1 ; j < i ; j ++ ) 
			{
				if ( sqr(a[i].fi-a[j].fi) <  4*a[j].se*mid ) ok = false ; 
			}
			if ( ok == true ) l = mid ; 
			else r = mid ; 
		}
		a [i].se = l ; 
		cout << fixed << setprecision (3) << a [i].se << "\n" ; 
	}
}

// range , error , check special , ... 
// find key , find key 
//'-std=c++11' stay hard 
// there is no tomorrow

Compilation message

bal.cpp: In function 'void rf()':
bal.cpp:34:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |  freopen ("bai1.inp","r",stdin) ;
      |  ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB 2 numbers

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 348 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 532 KB 2000 numbers

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2059 ms 3200 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2036 ms 3716 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2057 ms 4668 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2053 ms 4444 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2040 ms 5476 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2068 ms 6504 KB Time limit exceeded
2 Halted 0 ms 0 KB -