Submission #1314375

#	Time	Username	Problem	Language	Result	Execution time	Memory
1314375		muramasa	Balloons (CEOI11_bal)	C++20	100 / 100	88 ms	3572 KiB

bal

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define fr(i,a,b,c) for(ll i = a;i<b;i+=c)
#define fre(i,a,b,c) for(int i = a;i>=b;i-=c)
#define fs first
#define sc second
#define all(a) a.begin(),a.end()
#define IINF 2000000005
#define LINF 1000000000000000005
#define str string
#define endl '\n'
using pii = pair<int,int>;
using pll = pair<ll,double>;
using tiii = tuple<int,int,int>;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int uid(int a, int b) { return uniform_int_distribution<int>(a,b)(rng); }
ll uld(ll a, ll b) { return uniform_int_distribution<ll>(a,b)(rng); }

constexpr int MOD = 1000000007;
//998244353

int main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
    int n;cin >> n;
    stack<pll> st;
    vector<double> ans(n);
    fr(i,0,n,1){
        ll x;cin >> x;
        double r;cin >> r;
        ans[i] = r;
        while(!st.empty() && min(ans[i],(double)(st.top().fs - x) * (st.top().fs - x)/((double)4 * st.top().sc)) >= st.top().sc){
            ans[i] = min(ans[i],(double)(st.top().fs - x) * (st.top().fs - x)/((double)4 * st.top().sc));
            st.pop();
        }
        if(!st.empty())ans[i] = min(ans[i],(double)(st.top().fs - x) * (st.top().fs - x)/((double)4 * st.top().sc));
        st.push({x,ans[i]});
    }
    fr(i,0,n,1)cout << fixed << setprecision(3) << ans[i] << endl;
}   

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