#include <cmath>
#include <functional>
#include <fstream>
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <set>
#include <map>
#include <list>
#include <time.h>
#include <math.h>
#include <random>
#include <deque>
#include <queue>
#include <unordered_map>
#include <unordered_set>
#include <iomanip>
#include <cassert>
#include <bitset>
#include <sstream>
#include <chrono>
#include <cstring>
#include <numeric>
using namespace std;
typedef long long ll;
typedef long double ld;
const int N = (int)2e5 + 7;
ld x[N], r[N], rad[N];
int n;
struct Circle {
ld x;
ld y;
ld radius;
};
bool check(Circle a, Circle b) {
ld d = (a.x - b.x) * (a.x - b.x) + (a.y - b.y) * (a.y - b.y);
if (d <= (a.radius + b.radius) * (a.radius + b.radius)) {
return false;
}
return true;
}
int main() {
#ifdef ONLINE_JUDGE
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#else
FILE* stream;
freopen_s(&stream, "input.txt", "r", stdin);
#endif
cin >> n;
for (int i = 1; i <= n; i++) {
cin >> x[i] >> r[i];
}
rad[1] = r[1];
for (int i = 2; i <= n; i++) {
ld best = r[i];
for (int j = 1; j < i; j++) {
ld lo = 0.0, hi = r[i], sol = 0.0;
for (int step = 1; step <= 100; step++) {
ld mi = (lo + hi) / 2;
if (check(Circle{rad[j], x[j], rad[j]}, Circle{mi, x[i], mi})) {
lo = mi + 1;
sol = mi;
}
else {
hi = mi - 1;
}
}
best = min(best, sol);
}
rad[i] = best;
}
for (int i = 1; i <= n; i++) {
cout << setprecision(10) << fixed << rad[i] << "\n";
}
return 0;
}
Compilation message
bal.cpp: In function 'int main()':
bal.cpp:53:9: error: 'freopen_s' was not declared in this scope; did you mean 'freopen64'?
53 | freopen_s(&stream, "input.txt", "r", stdin);
| ^~~~~~~~~
| freopen64
