#include <stdio.h>
#include <string.h>
#define N 5000
#define INF 0x3f3f3f3f3f3f3f3fLL
long long min(long long a, long long b) { return a < b ? a : b; }
int max(int a, int b) { return a > b ? a : b; }
long long eval(long long a, long long b, long long c) { return b - a * c; }
int main() {
static int aa[N], ll[N], rr[N], tt[N];
static long long dp[N][N * 2 + 1], dq[N][N * 2 + 1], dr[N * 2 + 1], qu[N * 2 + 1];
int n, i, j, k, head, cnt;
long long ans;
scanf("%d", &n);
for (i = 0; i < n; i++)
scanf("%d", &aa[i]);
for (i = 0; i < n; i++) {
for (j = i - 1; j >= 0; j--)
if (aa[j] == -1)
break;
ll[i] = j;
for (j = i + 1; j < n; j++)
if (aa[j] == -1)
break;
rr[i] = j;
tt[i] = min(ll[i] == -1 ? INF : i - ll[i], rr[i] == n ? INF : rr[i] - i) * 2;
}
for (i = 0; i < n; i++) {
memset(dp[i], 0x3f, (n * 2 + 1) * sizeof *dp[i]);
memset(dq[i], 0x3f, (n * 2 + 1) * sizeof *dq[i]);
}
ans = 0;
for (i = 0; i < n; i++)
if (aa[i] > 0) {
for (k = 0; k <= n * 2; k++) {
if ((j = ll[i]) >= 0)
dp[i][k] = min(dp[i][k], dq[j][k] + i - j);
if ((j = rr[i]) < n)
dp[i][k] = min(dp[i][k], dq[j][k] + j - i);
}
dp[i][1] = min(dp[i][1], i);
head = cnt = 0;
for (k = 0; k <= n * 2; k++) {
if (dp[i][k] <= i * 2) {
while (cnt && eval(qu[head + cnt - 1], dp[i][qu[head + cnt - 1]], tt[i]) >= eval(k, dp[i][k], tt[i]))
cnt--;
qu[head + cnt++] = k;
}
while (cnt && k - qu[head] >= aa[i])
head++, cnt--;
dr[k] = cnt == 0 ? INF : eval(qu[head], dp[i][qu[head]], tt[i]) + (long long) tt[i] * k;
}
for (k = 0; k <= n * 2; k++)
dp[i][k] = dr[k];
for (k = 0; k <= n * 2; k++) {
long long t = dp[i][k];
if (t > i * 2)
continue;
ans = max(ans, k);
if (k < n * 2) {
if ((j = ll[i]) >= 0)
dq[j][k + 1] = min(dq[j][k + 1], t + i - j);
if ((j = rr[i]) < n)
dq[j][k + 1] = min(dq[j][k + 1], t + j - i);
}
}
} else
for (k = 0; k <= n * 2; k++) {
long long t = dq[i][k];
if (t == INF)
continue;
if ((j = rr[i]) < n)
dq[j][k] = min(dq[j][k], t + j - i);
}
ans = -ans;
for (i = 0; i < n; i++)
if (aa[i] > 0)
ans += aa[i];
printf("%lld\n", ans);
return 0;
}
Compilation message
tortoise.c: In function 'main':
tortoise.c:18:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
18 | scanf("%d", &n);
| ^~~~~~~~~~~~~~~
tortoise.c:20:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
20 | scanf("%d", &aa[i]);
| ^~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
332 KB |
Output is correct |
| 2 |
Correct |
0 ms |
460 KB |
Output is correct |
| 3 |
Correct |
0 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
0 ms |
332 KB |
Output is correct |
| 6 |
Correct |
0 ms |
460 KB |
Output is correct |
| 7 |
Correct |
0 ms |
332 KB |
Output is correct |
| 8 |
Correct |
0 ms |
332 KB |
Output is correct |
| 9 |
Correct |
0 ms |
416 KB |
Output is correct |
| 10 |
Correct |
0 ms |
332 KB |
Output is correct |
| 11 |
Correct |
0 ms |
332 KB |
Output is correct |
| 12 |
Correct |
0 ms |
332 KB |
Output is correct |
| 13 |
Correct |
0 ms |
332 KB |
Output is correct |
| 14 |
Correct |
0 ms |
332 KB |
Output is correct |
| 15 |
Correct |
0 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
0 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
460 KB |
Output is correct |
| 19 |
Correct |
0 ms |
460 KB |
Output is correct |
| 20 |
Correct |
0 ms |
332 KB |
Output is correct |
| 21 |
Correct |
0 ms |
332 KB |
Output is correct |
| 22 |
Correct |
0 ms |
332 KB |
Output is correct |
| 23 |
Correct |
0 ms |
460 KB |
Output is correct |
| 24 |
Correct |
0 ms |
460 KB |
Output is correct |
| 25 |
Correct |
0 ms |
332 KB |
Output is correct |
| 26 |
Correct |
0 ms |
332 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
332 KB |
Output is correct |
| 2 |
Correct |
0 ms |
460 KB |
Output is correct |
| 3 |
Correct |
0 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
0 ms |
332 KB |
Output is correct |
| 6 |
Correct |
0 ms |
460 KB |
Output is correct |
| 7 |
Correct |
0 ms |
332 KB |
Output is correct |
| 8 |
Correct |
0 ms |
332 KB |
Output is correct |
| 9 |
Correct |
0 ms |
416 KB |
Output is correct |
| 10 |
Correct |
0 ms |
332 KB |
Output is correct |
| 11 |
Correct |
0 ms |
332 KB |
Output is correct |
| 12 |
Correct |
0 ms |
332 KB |
Output is correct |
| 13 |
Correct |
0 ms |
332 KB |
Output is correct |
| 14 |
Correct |
0 ms |
332 KB |
Output is correct |
| 15 |
Correct |
0 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
0 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
460 KB |
Output is correct |
| 19 |
Correct |
0 ms |
460 KB |
Output is correct |
| 20 |
Correct |
0 ms |
332 KB |
Output is correct |
| 21 |
Correct |
0 ms |
332 KB |
Output is correct |
| 22 |
Correct |
0 ms |
332 KB |
Output is correct |
| 23 |
Correct |
0 ms |
460 KB |
Output is correct |
| 24 |
Correct |
0 ms |
460 KB |
Output is correct |
| 25 |
Correct |
0 ms |
332 KB |
Output is correct |
| 26 |
Correct |
0 ms |
332 KB |
Output is correct |
| 27 |
Correct |
2 ms |
4300 KB |
Output is correct |
| 28 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 29 |
Correct |
2 ms |
4940 KB |
Output is correct |
| 30 |
Correct |
2 ms |
4428 KB |
Output is correct |
| 31 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 32 |
Correct |
2 ms |
3532 KB |
Output is correct |
| 33 |
Correct |
3 ms |
4812 KB |
Output is correct |
| 34 |
Correct |
2 ms |
4384 KB |
Output is correct |
| 35 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 36 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 37 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 38 |
Correct |
3 ms |
5540 KB |
Output is correct |
| 39 |
Correct |
3 ms |
5536 KB |
Output is correct |
| 40 |
Correct |
3 ms |
5536 KB |
Output is correct |
| 41 |
Correct |
3 ms |
5580 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
332 KB |
Output is correct |
| 2 |
Correct |
0 ms |
460 KB |
Output is correct |
| 3 |
Correct |
0 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
0 ms |
332 KB |
Output is correct |
| 6 |
Correct |
0 ms |
460 KB |
Output is correct |
| 7 |
Correct |
0 ms |
332 KB |
Output is correct |
| 8 |
Correct |
0 ms |
332 KB |
Output is correct |
| 9 |
Correct |
0 ms |
416 KB |
Output is correct |
| 10 |
Correct |
0 ms |
332 KB |
Output is correct |
| 11 |
Correct |
0 ms |
332 KB |
Output is correct |
| 12 |
Correct |
0 ms |
332 KB |
Output is correct |
| 13 |
Correct |
0 ms |
332 KB |
Output is correct |
| 14 |
Correct |
0 ms |
332 KB |
Output is correct |
| 15 |
Correct |
0 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
0 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
460 KB |
Output is correct |
| 19 |
Correct |
0 ms |
460 KB |
Output is correct |
| 20 |
Correct |
0 ms |
332 KB |
Output is correct |
| 21 |
Correct |
0 ms |
332 KB |
Output is correct |
| 22 |
Correct |
0 ms |
332 KB |
Output is correct |
| 23 |
Correct |
0 ms |
460 KB |
Output is correct |
| 24 |
Correct |
0 ms |
460 KB |
Output is correct |
| 25 |
Correct |
0 ms |
332 KB |
Output is correct |
| 26 |
Correct |
0 ms |
332 KB |
Output is correct |
| 27 |
Correct |
2 ms |
4300 KB |
Output is correct |
| 28 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 29 |
Correct |
2 ms |
4940 KB |
Output is correct |
| 30 |
Correct |
2 ms |
4428 KB |
Output is correct |
| 31 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 32 |
Correct |
2 ms |
3532 KB |
Output is correct |
| 33 |
Correct |
3 ms |
4812 KB |
Output is correct |
| 34 |
Correct |
2 ms |
4384 KB |
Output is correct |
| 35 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 36 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 37 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 38 |
Correct |
3 ms |
5540 KB |
Output is correct |
| 39 |
Correct |
3 ms |
5536 KB |
Output is correct |
| 40 |
Correct |
3 ms |
5536 KB |
Output is correct |
| 41 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 42 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 43 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 44 |
Correct |
2 ms |
4044 KB |
Output is correct |
| 45 |
Correct |
2 ms |
5068 KB |
Output is correct |
| 46 |
Correct |
2 ms |
3788 KB |
Output is correct |
| 47 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 48 |
Correct |
2 ms |
4428 KB |
Output is correct |
| 49 |
Correct |
2 ms |
3740 KB |
Output is correct |
| 50 |
Correct |
3 ms |
4892 KB |
Output is correct |
| 51 |
Correct |
3 ms |
5196 KB |
Output is correct |
| 52 |
Correct |
2 ms |
3404 KB |
Output is correct |
| 53 |
Correct |
3 ms |
5072 KB |
Output is correct |
| 54 |
Correct |
3 ms |
5068 KB |
Output is correct |
| 55 |
Correct |
3 ms |
4428 KB |
Output is correct |
| 56 |
Correct |
2 ms |
5452 KB |
Output is correct |
| 57 |
Correct |
2 ms |
3352 KB |
Output is correct |
| 58 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 59 |
Correct |
2 ms |
3660 KB |
Output is correct |
| 60 |
Correct |
3 ms |
4556 KB |
Output is correct |
| 61 |
Correct |
2 ms |
4812 KB |
Output is correct |
| 62 |
Correct |
3 ms |
4892 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
332 KB |
Output is correct |
| 2 |
Correct |
0 ms |
460 KB |
Output is correct |
| 3 |
Correct |
0 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
0 ms |
332 KB |
Output is correct |
| 6 |
Correct |
0 ms |
460 KB |
Output is correct |
| 7 |
Correct |
0 ms |
332 KB |
Output is correct |
| 8 |
Correct |
0 ms |
332 KB |
Output is correct |
| 9 |
Correct |
0 ms |
416 KB |
Output is correct |
| 10 |
Correct |
0 ms |
332 KB |
Output is correct |
| 11 |
Correct |
0 ms |
332 KB |
Output is correct |
| 12 |
Correct |
0 ms |
332 KB |
Output is correct |
| 13 |
Correct |
0 ms |
332 KB |
Output is correct |
| 14 |
Correct |
0 ms |
332 KB |
Output is correct |
| 15 |
Correct |
0 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
0 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
460 KB |
Output is correct |
| 19 |
Correct |
0 ms |
460 KB |
Output is correct |
| 20 |
Correct |
0 ms |
332 KB |
Output is correct |
| 21 |
Correct |
0 ms |
332 KB |
Output is correct |
| 22 |
Correct |
0 ms |
332 KB |
Output is correct |
| 23 |
Correct |
0 ms |
460 KB |
Output is correct |
| 24 |
Correct |
0 ms |
460 KB |
Output is correct |
| 25 |
Correct |
0 ms |
332 KB |
Output is correct |
| 26 |
Correct |
0 ms |
332 KB |
Output is correct |
| 27 |
Correct |
2 ms |
4300 KB |
Output is correct |
| 28 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 29 |
Correct |
2 ms |
4940 KB |
Output is correct |
| 30 |
Correct |
2 ms |
4428 KB |
Output is correct |
| 31 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 32 |
Correct |
2 ms |
3532 KB |
Output is correct |
| 33 |
Correct |
3 ms |
4812 KB |
Output is correct |
| 34 |
Correct |
2 ms |
4384 KB |
Output is correct |
| 35 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 36 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 37 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 38 |
Correct |
3 ms |
5540 KB |
Output is correct |
| 39 |
Correct |
3 ms |
5536 KB |
Output is correct |
| 40 |
Correct |
3 ms |
5536 KB |
Output is correct |
| 41 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 42 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 43 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 44 |
Correct |
2 ms |
4044 KB |
Output is correct |
| 45 |
Correct |
2 ms |
5068 KB |
Output is correct |
| 46 |
Correct |
2 ms |
3788 KB |
Output is correct |
| 47 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 48 |
Correct |
2 ms |
4428 KB |
Output is correct |
| 49 |
Correct |
2 ms |
3740 KB |
Output is correct |
| 50 |
Correct |
3 ms |
4892 KB |
Output is correct |
| 51 |
Correct |
3 ms |
5196 KB |
Output is correct |
| 52 |
Correct |
2 ms |
3404 KB |
Output is correct |
| 53 |
Correct |
3 ms |
5072 KB |
Output is correct |
| 54 |
Correct |
3 ms |
5068 KB |
Output is correct |
| 55 |
Correct |
3 ms |
4428 KB |
Output is correct |
| 56 |
Correct |
2 ms |
5452 KB |
Output is correct |
| 57 |
Correct |
2 ms |
3352 KB |
Output is correct |
| 58 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 59 |
Correct |
2 ms |
3660 KB |
Output is correct |
| 60 |
Correct |
3 ms |
4556 KB |
Output is correct |
| 61 |
Correct |
2 ms |
4812 KB |
Output is correct |
| 62 |
Correct |
3 ms |
4892 KB |
Output is correct |
| 63 |
Runtime error |
212 ms |
524292 KB |
Execution killed with signal 9 |
| 64 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
332 KB |
Output is correct |
| 2 |
Correct |
0 ms |
460 KB |
Output is correct |
| 3 |
Correct |
0 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
0 ms |
332 KB |
Output is correct |
| 6 |
Correct |
0 ms |
460 KB |
Output is correct |
| 7 |
Correct |
0 ms |
332 KB |
Output is correct |
| 8 |
Correct |
0 ms |
332 KB |
Output is correct |
| 9 |
Correct |
0 ms |
416 KB |
Output is correct |
| 10 |
Correct |
0 ms |
332 KB |
Output is correct |
| 11 |
Correct |
0 ms |
332 KB |
Output is correct |
| 12 |
Correct |
0 ms |
332 KB |
Output is correct |
| 13 |
Correct |
0 ms |
332 KB |
Output is correct |
| 14 |
Correct |
0 ms |
332 KB |
Output is correct |
| 15 |
Correct |
0 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
0 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
460 KB |
Output is correct |
| 19 |
Correct |
0 ms |
460 KB |
Output is correct |
| 20 |
Correct |
0 ms |
332 KB |
Output is correct |
| 21 |
Correct |
0 ms |
332 KB |
Output is correct |
| 22 |
Correct |
0 ms |
332 KB |
Output is correct |
| 23 |
Correct |
0 ms |
460 KB |
Output is correct |
| 24 |
Correct |
0 ms |
460 KB |
Output is correct |
| 25 |
Correct |
0 ms |
332 KB |
Output is correct |
| 26 |
Correct |
0 ms |
332 KB |
Output is correct |
| 27 |
Correct |
2 ms |
4300 KB |
Output is correct |
| 28 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 29 |
Correct |
2 ms |
4940 KB |
Output is correct |
| 30 |
Correct |
2 ms |
4428 KB |
Output is correct |
| 31 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 32 |
Correct |
2 ms |
3532 KB |
Output is correct |
| 33 |
Correct |
3 ms |
4812 KB |
Output is correct |
| 34 |
Correct |
2 ms |
4384 KB |
Output is correct |
| 35 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 36 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 37 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 38 |
Correct |
3 ms |
5540 KB |
Output is correct |
| 39 |
Correct |
3 ms |
5536 KB |
Output is correct |
| 40 |
Correct |
3 ms |
5536 KB |
Output is correct |
| 41 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 42 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 43 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 44 |
Correct |
2 ms |
4044 KB |
Output is correct |
| 45 |
Correct |
2 ms |
5068 KB |
Output is correct |
| 46 |
Correct |
2 ms |
3788 KB |
Output is correct |
| 47 |
Correct |
2 ms |
3276 KB |
Output is correct |
| 48 |
Correct |
2 ms |
4428 KB |
Output is correct |
| 49 |
Correct |
2 ms |
3740 KB |
Output is correct |
| 50 |
Correct |
3 ms |
4892 KB |
Output is correct |
| 51 |
Correct |
3 ms |
5196 KB |
Output is correct |
| 52 |
Correct |
2 ms |
3404 KB |
Output is correct |
| 53 |
Correct |
3 ms |
5072 KB |
Output is correct |
| 54 |
Correct |
3 ms |
5068 KB |
Output is correct |
| 55 |
Correct |
3 ms |
4428 KB |
Output is correct |
| 56 |
Correct |
2 ms |
5452 KB |
Output is correct |
| 57 |
Correct |
2 ms |
3352 KB |
Output is correct |
| 58 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 59 |
Correct |
2 ms |
3660 KB |
Output is correct |
| 60 |
Correct |
3 ms |
4556 KB |
Output is correct |
| 61 |
Correct |
2 ms |
4812 KB |
Output is correct |
| 62 |
Correct |
3 ms |
4892 KB |
Output is correct |
| 63 |
Runtime error |
212 ms |
524292 KB |
Execution killed with signal 9 |
| 64 |
Halted |
0 ms |
0 KB |
- |
