Submission #1167249

#	Time	Username	Problem	Language	Result	Execution time	Memory
1167249		M0stafa	Balloons (CEOI11_bal)	C++20	100 / 100	1277 ms	2208 KiB

bal

#include <iostream>
#include <vector>
using namespace std;

vector<pair<long double, long double>> curr;
int n;

long double findval(int pos, long double x) {
    return (curr[pos].first - x) * (curr[pos].first - x) / 4.0 / curr[pos].second;
}

int main() {
    scanf("%d", &n);
    for (int i = 0; i < n; i++) {
        long double x, rad;
        scanf("%Lf %Lf", &x, &rad);
        for (int j = 0; j < curr.size(); j++) {
            rad = min(rad, findval(j, x));
        }
        while (curr.size() > 0 && rad + (long double)1e-18 > curr.back().second) {
            curr.pop_back();
        }
        curr.push_back(make_pair(x, rad));
        printf("%.3Lf\n", rad);
    }
    return 0;
}

Compilation message (stderr)

bal.cpp: In function 'int main()':
bal.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
bal.cpp:16:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         scanf("%Lf %Lf", &x, &rad);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~

• 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