Submission #20132

#	Time	Username	Problem	Language	Result	Execution time	Memory
20132		hongjun7	격자 보존하기 (GA9_preserve)	C++14	100 / 100	71 ms	2892 KiB

preserve

#include <iostream>
#include <algorithm>
using namespace std;
#define MAXK 100000
int n, k, d, p[MAXK + 1];
struct BLOCK {
	int cost, value;
} b[MAXK + 5]; int bn;
inline bool cmp(BLOCK b1, BLOCK b2) {
	if (b1.value != b2.value) return b1.value > b2.value;
	return b1.cost < b2.cost;
}
int res;
void solve(int sum, int D) {
	for (int i = 1; i <= bn; i++) {
		if (b[i].cost <= D) {
			D -= b[i].cost;
			sum += b[i].value;
		}
	}
	if (res < sum) res = sum;
}
int main() {
	cin >> n >> k >> d;
	for (int i = 1; i <= k; i++) cin >> p[i];
	for (int i = 2; i <= k; i++) b[++bn] = { 2, p[i] - p[i - 1] - 1 };
	sort(b + 1, b + bn + 1, cmp);
	solve(0, d);
	solve(p[1] - 1, d - 1);
	solve(n - p[k], d - 1);
	solve(p[1] - 1 + n - p[k], d - 2);
	cout << res;
}

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