Submission #535308

#	Time	Username	Problem	Language	Result	Execution time	Memory
535308		tphuc2908	Balloons (CEOI11_bal)	C++14	50 / 100	2087 ms	4076 KiB

bal

#include<bits/stdc++.h>

using namespace std;
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#define rep(i, x, y) for(int i = x; i <= y; ++i)
#define repi(i,x,y) for(int i = x; i >= y; --i)
#define ci(x) int x; cin>> x
#define TC(t) ci(t); while(t--)
#define fi first
#define se second
#define pb push_back
#define all(x) x.begin(), x.end()
#define cii(x, y) ci(x); ci(y)
#define ciii(x, y, z) ci(x); ci(y); ci(z)
#define mp make_pair
//#define int long long
typedef long long ll;
typedef vector<int> vi;
const int N = 2e5 + 5;
const int NN = 16 + 15;
const int mod =  998244353;
const int mod1 = 1e9 + 9;
const int pi = 31;
const int inf = 1e9 + 6;
const int block = 500;
const int dx[4] = {-1, 0, 1, 0};
const int dy[4] = {0, -1, 0, 1};
const int base = 1e9;
typedef vector<int> bignum;

void readfile(){
    #ifdef ONLINE_JUDGE
    #else
        freopen("text.inp", "r", stdin);
    #endif // ONLINE_JUDGE
//    freopen("text.inp", "r", stdin);
//    freopen("template.out", "w", stdout);
}

int n;
long long a[N], r[N];

void inp(){
    cin >> n;
    for(int i = 1; i <= n; ++i) cin >> a[i] >> r[i];
}

long double res[N];

void process(){
    stack<pair<int,double> > st;
    for(int i = 1; i <= n; ++i){
        res[i] = r[i];
        for(int j = 1; j < i; ++j){
            long long temp1 = (a[i] - a[j]) * 1LL * (a[i] - a[j]);
            long double temp = temp1;
            long double rr = temp / (4.0 * res[j]);
            res[i] = min(res[i], rr);
        }
        cout << fixed << setprecision(3) << res[i] << '\n';
    }
}

int main() {
//    readfile();
    ios_base::sync_with_stdio(0);
    cin.tie(0);
//    int t; cin >> t >> opt;
//    while(t--){
        inp();
        process();
//    }
    return 0;
}

Compilation message (stderr)

bal.cpp: In function 'void readfile()':
bal.cpp:35:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |         freopen("text.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10