Submission #39808

#	Time	Username	Problem	Language	Result	Execution time	Memory
39808		14kg	Gap (APIO16_gap)	C++11	100 / 100	103 ms	9052 KiB

gap

#include "gap.h"
#include <set>
#define NUM_MAX 1000000000000000000
#define max2(x,y) (x>y?x:y)
#define min2(x,y) (x<y?x:y)

using namespace std;
int n;
set<long long> S;

long long f1() {
	long long l = 0, r = NUM_MAX;
	long long t1, t2, res = 0;

	while (l <= r) {
		MinMax(l, r, &t1, &t2);
		if (t1 < 0) break;
		
		S.insert(l = t1), S.insert(r = t2);
		l++, r--;
		if (S.size() == n) break;
	}
	
	t1 = NUM_MAX;
	for (auto i : S) res = max2(res, i - t1), t1 = i;
	return res;
}
long long f2() {
	long long S, E, len, res, t1, t2, path = NUM_MAX;

	MinMax(0, NUM_MAX, &S, &E);
	res = len = (E - S) / (n - 1) + ((E - S) % (n - 1) ? 1 : 0);

	for (long long s = S; s < E; s += len) {
		MinMax(s, min2(s + len - 1, E - 1), &t1, &t2);
		if (t1 < 0) continue;
		res = max2(res, t1 - path), path = t2;
	} res = max2(res, E - path);
	return res;
}
long long findGap(int T, int _n) {
	n = _n;
	if (T == 1) return f1();
	else return f2();
}

Compilation message (stderr)

gap.cpp: In function 'long long int f1()':
gap.cpp:21:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (S.size() == n) break;
                ^

• Subtask 1: 30 / 30
• Subtask 2: 70 / 70