제출 #719376

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
719376		MarwenElarbi	Balloons (CEOI11_bal)	C++14	0 / 100	586 ms	3000 KiB

bal

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define vi vector<int>
#define ve vector
#define ll long long
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define onbit __builtin_popcount
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF 1e18
#define eps 1e-7
#define eps1 1e-2
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MAX_A 1e5+5
using namespace std;
using namespace __gnu_pbds;
template <class T>
using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const ll MOD = 1e9+7;
const int nax = 1e5+5;
const int MAX_VAL = 1e6;
double PI=3.14159265359;
int arx[8]={1,1,0,-1,-1,-1, 0, 1};
int ary[8]={0,1,1, 1, 0,-1,-1,-1};
typedef complex<int> Point;
#define X real()
#define Y imag()
void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}
double calculate(double x,double y,double a, double b){
    return sqrt((x-a)*(x-a)+(y-b)*(y-b));
}
int main(){
    optimise;
    /*#ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif*/
    // setIO("walk");
    int n;
    cin>>n;
    stack<pair<double,double>> tab;
    for (int i = 0; i < n; ++i)
    {
        double x;
        double y;
        cin>>x>>y;  
        if (tab.empty())
        {
            cout << fixed <<setprecision(3)<<y<<endl;
            tab.push({x,y});
        }else{
            while (!tab.empty()){
                double l=0;
                double r=y;
                //cout << "mqsdgkqspok" << calculate(x,y,tab.top().fi,tab.top().se)<<endl;
                while (r-l>0.001)
                {
                    double mid=(r+l)/2;
                    //cout << mid<<endl;
                    if (calculate(x,mid,tab.top().fi,tab.top().se)>mid+tab.top().se) l=mid;
                    else r=mid;
                }
                //cout << r << tab.top().se <<endl;
                if (r>=tab.top().se){
                    tab.pop();
                }else{
                    cout << fixed << setprecision(3) <<r<<endl;
                    tab.push({x,y});
                    break;
                }
            }
            if (tab.empty()){
                cout << fixed <<setprecision(3)<<y<<endl;
                tab.push({x,y});
            }
        }
    }

}
  

컴파일 시 표준 에러 (stderr) 메시지

bal.cpp: In function 'void setIO(std::string)':
bal.cpp:36:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bal.cpp:37:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
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• Subtask 10: 0 / 10