Submission #20975

#	Time	Username	Problem	Language	Result	Execution time	Memory
20975		undecember	격자 보존하기 (GA9_preserve)	C++14	100 / 100	39 ms	2408 KiB

preserve

#include <bits/stdc++.h>

using namespace std;

int n, k, d;
int mp[2], kp[100005];

int main(void)
{
	scanf("%d%d%d", &n, &k, &d);
	int ans = 0;

	int lp;
	scanf("%d", &lp);
	mp[0] = lp - 1;
	for (int i = 0; i < k - 1; i++)
	{
		scanf("%d", &kp[i]);
		kp[i] = kp[i] - lp - 1;
		lp = kp[i] + lp + 1;
	}
	mp[1] = n - lp;

	sort(mp, mp + 2);
	sort(kp, kp + (k - 1));

	int rst = 2 * k - d;
	for (int i = 0; i < 2; i++)
	{
		for (int j = 0; j < 2; j++)
		{
			int tv = n - k - i * mp[0] - j * mp[1];
			int r = rst - i - j;

			int ki;
			for (ki = 0; r >= 2 && ki < k - 1; ki++)
			{
				tv -= kp[ki];
				r -= 2;
			}
			if (r == 1)
			{
				if (k - 1 > 0) { tv -= kp[ki]; r--; }
				else continue;
			}

			if (tv > ans) ans = tv;
		}
	}

	printf("%d", ans);
}

Compilation message (stderr)

preserve.cpp: In function 'int main()':
preserve.cpp:10:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d", &n, &k, &d);
                             ^
preserve.cpp:14:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &lp);
                  ^
preserve.cpp:18:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &kp[i]);
                      ^

• Subtask 1: 9 / 9
• Subtask 2: 17 / 17
• Subtask 3: 22 / 22
• Subtask 4: 17 / 17
• Subtask 5: 35 / 35