Submission #605450

#	Time	Username	Problem	Language	Result	Execution time	Memory
605450		bzhu524	Mobile (BOI12_mobile)	C++14	Compilation error	0 ms	0 KiB

mobile

#include <bits/stdc++.h>
#define ll long long 

using namespace std;

pair<ll, ll> p[1000000];


int main() {
	ios_base::sync_with_stdio(false);
	int n, int len;

	cin >> n >> len;

	for (int i=0; i<n; i++) cin >> p[i].x >> p[i].y;

	double lower = 1;
	double upper = 1000000000;

	while (upper - lower >= 1e-3) {
		double mid = (upper + lower) / 2;
		double currPoint = 0;
		for (int i=0; i<n; i++) {
			ll x = p[i][0];
			ll y = p[i][1];
			
			double delta = sqrt(mid * mid - y * y);
			double p1 = x - delta;
			double p2 = x + delta;

			if (p1 <= currPoint) {
				currPoint = Math.max(currPoint, p2);
			}
		}

		if (currPoint < len) {
			lower = mid;
		} else {
			upper = mid;
		}
	}

	cout << setprecision(4) << l << "\n";
}

Compilation message (stderr)

mobile.cpp: In function 'int main()':
mobile.cpp:11:9: error: expected unqualified-id before 'int'
   11 |  int n, int len;
      |         ^~~
mobile.cpp:13:14: error: 'len' was not declared in this scope; did you mean 'mblen'?
   13 |  cin >> n >> len;
      |              ^~~
      |              mblen
mobile.cpp:15:38: error: 'struct std::pair<long long int, long long int>' has no member named 'x'
   15 |  for (int i=0; i<n; i++) cin >> p[i].x >> p[i].y;
      |                                      ^
mobile.cpp:15:48: error: 'struct std::pair<long long int, long long int>' has no member named 'y'
   15 |  for (int i=0; i<n; i++) cin >> p[i].x >> p[i].y;
      |                                                ^
mobile.cpp:24:15: error: no match for 'operator[]' (operand types are 'std::pair<long long int, long long int>' and 'int')
   24 |    ll x = p[i][0];
      |               ^
mobile.cpp:25:15: error: no match for 'operator[]' (operand types are 'std::pair<long long int, long long int>' and 'int')
   25 |    ll y = p[i][1];
      |               ^
mobile.cpp:32:17: error: 'Math' was not declared in this scope
   32 |     currPoint = Math.max(currPoint, p2);
      |                 ^~~~
mobile.cpp:43:29: error: 'l' was not declared in this scope
   43 |  cout << setprecision(4) << l << "\n";
      |                             ^