oj.uz

답안 #590214

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
590214 2022-07-05T16:40:01 Z rainboy Uplifting Excursion (BOI22_vault) C
5 / 100
 17 ms 1068 KB 
#include <stdio.h>
#include <string.h>

#define N	100
#define INF	0x3f3f3f3f

long long min(long long a, long long b) { return a < b ? a : b; }
long long max(long long a, long long b) { return a > b ? a : b; }

void update(int *dp, int s_, int a, int k, int c) {
	static int dq[N * N * 2 + 1], qu[N * N * 2 + 1];
	int s, r, head, cnt;

	if (a > 0) {
		for (s = 0; s <= s_; s++)
			dq[s] = dp[s] == -INF ? -INF : dp[s] - s / a * c;
		for (r = 0; r < a; r++) {
			head = cnt = 0;
			for (s = r; s <= s_; s += a) {
				if (dq[s] != -INF) {
					while (cnt && dq[qu[head + cnt - 1]] < dq[s])
						cnt--;
					qu[head + cnt++] = s;
				}
				dp[s] = cnt == 0 ? -INF : dq[qu[head]] + s / a * c;
				if (cnt && qu[head] == s - a * k)
					head++, cnt--;
			}
		}
	} else if (a < 0) {
		a = -a;
		for (s = 0; s <= s_; s++)
			dq[s] = dp[s] == -INF ? -INF : dp[s] + s / a * c;
		for (r = 0; r < a; r++) {
			head = cnt = 0;
			for (s = (s_ - r) / a * a + r; s >= 0; s -= a) {
				if (dq[s] != -INF) {
					while (cnt && dq[qu[head + cnt - 1]] < dq[s])
						cnt--;
					qu[head + cnt++] = s;
				}
				dp[s] = cnt == 0 ? -INF : dq[qu[head]] - s / a * c;
				if (cnt && qu[head] == s + a * k)
					head++, cnt--;
			}
		}
	} else {
		if (c <= 0)
			return;
		for (s = 0; s <= s_; s++)
			if (dp[s] != -INF)
				dp[s] += k * c;
	}
}

long long solve(long long *kk, int n, long long s_) {
	static int dp[N * N * 2 + 1], dq[N + 1][N * N + 1], dr[N * N + 1], qu[N * N + 1];
	int a, r1, r2, head, cnt, lower, upper;
	long long s, s0, s2, k0, ans;
	int s1;

	for (s = 0; s <= n * n; s++)
		dp[s] = -INF;
	dp[0] = 0;
	for (a = n; a >= 0; a--) {
		memcpy(dq[a], dp, (n * n + 1) * sizeof *dp);
		update(dp, n * n, a, min(kk[n + a], n), 1);
	}
	for (s = 0; s <= n * n * 2; s++)
		dp[s] = -INF;
	dp[n * n + 0] = 0;
	s0 = 0, k0 = 0;
	for (a = -n; a < 0; a++) {
		update(dp, n * n * 2, a, min(kk[n + a], n), -1);
		s0 += kk[n + a] * a, k0 += kk[n + a];
	}
	ans = -INF;
	for (a = 0; a <= n; a++) {
		if (a == 0) {
			for (s1 = 0; s1 <= n * n * 2; s1++) {
				s2 = s_ - s0 + s1 - n * n;
				if (dp[s1] != -INF && s2 >= 0 && s2 <= n * n && dq[a][s2] != -INF)
					ans = max(ans, k0 + dp[s1] + dq[a][s2] + kk[n + a]);
			}
		} else
			for (r1 = 0; r1 < a; r1++) {
				r2 = ((s_ - s0 - n * n + r1) % a + a) % a;
				head = cnt = 0;
				for (s1 = r1, lower = r2, upper = r2; s1 <= n * n * 2; s1 += a)
					if (dp[s1] != -INF) {
						while (lower <= n * n && s0 - s1 + n * n + lower < s_ - kk[n + a] * a) {
							if (cnt && qu[head] == lower)
								head++, cnt--;
							lower += a;
						}
						while (upper <= n * n && s0 - s1 + n * n + upper <= s_) {
							dr[upper] = dq[a][upper] == -INF ? -INF : dq[a][upper] - upper / a;
							if (dr[upper] != -INF && lower <= upper) {
								while (cnt && dr[qu[head + cnt - 1]] <= dr[upper])
									cnt--;
								qu[head + cnt++] = upper;
							}
							upper += a;
						}
						if (cnt)
							ans = max(ans, k0 + dp[s1] + (s_ - s0 + s1 - n * n) / a + dr[qu[head]]);
					}
			}
		update(dp, n * n * 2, a, min(kk[n + a], n), -1);
		s0 += kk[n + a] * a, k0 += kk[n + a];
	}
	return ans;
}

int main() {
	static long long kk[N * 2 + 1];
	int n, a, r, subtask1;
	long long s, ans, tmp;

	scanf("%d%lld", &n, &s);
	subtask1 = n <= 50;
	for (a = -n; a <= n; a++) {
		scanf("%lld", &kk[n + a]);
		if (kk[n + a] > 50)
			subtask1 = 0;
	}
	if (!subtask1)
		return 0;
	ans = -INF;
	for (r = 0; r < 2; r++) {
		ans = max(ans, solve(kk, n, s));
		for (a = 1; a <= n; a++)
			tmp = kk[n - a], kk[n - a] = kk[n + a], kk[n + a] = tmp;
		s = -s;
	}
	if (ans == -INF)
		printf("impossible\n");
	else
		printf("%lld\n", ans);
	return 0;
}

Compilation message

vault.c: In function 'main':
vault.c:120:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  120 |  scanf("%d%lld", &n, &s);
      |  ^~~~~~~~~~~~~~~~~~~~~~~
vault.c:123:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  123 |   scanf("%lld", &kk[n + a]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 15 ms 980 KB Output is correct
6 Correct 17 ms 1060 KB Output is correct
7 Correct 13 ms 980 KB Output is correct
8 Correct 14 ms 1068 KB Output is correct
9 Correct 14 ms 1060 KB Output is correct
10 Correct 7 ms 980 KB Output is correct
11 Correct 8 ms 980 KB Output is correct

Subtask #2
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 15 ms 980 KB Output is correct
6 Correct 17 ms 1060 KB Output is correct
7 Correct 13 ms 980 KB Output is correct
8 Correct 14 ms 1068 KB Output is correct
9 Correct 14 ms 1060 KB Output is correct
10 Correct 7 ms 980 KB Output is correct
11 Correct 8 ms 980 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 14 ms 1052 KB Output is correct
17 Correct 15 ms 1060 KB Output is correct
18 Correct 13 ms 1028 KB Output is correct
19 Correct 16 ms 1064 KB Output is correct
20 Correct 16 ms 1068 KB Output is correct
21 Correct 7 ms 980 KB Output is correct
22 Correct 9 ms 1064 KB Output is correct
23 Incorrect 1 ms 212 KB Output isn't correct
24 Halted 0 ms 0 KB -

Subtask #3-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3-2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4-2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 15 ms 980 KB Output is correct
6 Correct 17 ms 1060 KB Output is correct
7 Correct 13 ms 980 KB Output is correct
8 Correct 14 ms 1068 KB Output is correct
9 Correct 14 ms 1060 KB Output is correct
10 Correct 7 ms 980 KB Output is correct
11 Correct 8 ms 980 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Incorrect 1 ms 212 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #5-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5-2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 15 ms 980 KB Output is correct
6 Correct 17 ms 1060 KB Output is correct
7 Correct 13 ms 980 KB Output is correct
8 Correct 14 ms 1068 KB Output is correct
9 Correct 14 ms 1060 KB Output is correct
10 Correct 7 ms 980 KB Output is correct
11 Correct 8 ms 980 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 14 ms 1052 KB Output is correct
17 Correct 15 ms 1060 KB Output is correct
18 Correct 13 ms 1028 KB Output is correct
19 Correct 16 ms 1064 KB Output is correct
20 Correct 16 ms 1068 KB Output is correct
21 Correct 7 ms 980 KB Output is correct
22 Correct 9 ms 1064 KB Output is correct
23 Incorrect 1 ms 212 KB Output isn't correct
24 Halted 0 ms 0 KB -

Subtask #6-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6-2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 15 ms 980 KB Output is correct
6 Correct 17 ms 1060 KB Output is correct
7 Correct 13 ms 980 KB Output is correct
8 Correct 14 ms 1068 KB Output is correct
9 Correct 14 ms 1060 KB Output is correct
10 Correct 7 ms 980 KB Output is correct
11 Correct 8 ms 980 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 14 ms 1052 KB Output is correct
17 Correct 15 ms 1060 KB Output is correct
18 Correct 13 ms 1028 KB Output is correct
19 Correct 16 ms 1064 KB Output is correct
20 Correct 16 ms 1068 KB Output is correct
21 Correct 7 ms 980 KB Output is correct
22 Correct 9 ms 1064 KB Output is correct
23 Incorrect 1 ms 212 KB Output isn't correct
24 Halted 0 ms 0 KB -