oj.uz

Submission #59955

# Submission time Handle Problem Language Result Execution time Memory
59955 2018-07-23T11:23:27 Z ainta(#1720) Sparklers (JOI17_sparklers) C++11
50 / 100
 49 ms 4604 KB 
#include<cstdio>
#include<algorithm>
#define N_ 1010
using namespace std;
int n, st;
long long T, INF = 1e9, X[N_];
int D[N_][N_];
bool Pos(long long KK) {
	long long L = T*KK;
	if (L >= 1e9)return true;
	int i, j;
	for (i = 1; i <= n; i++)for (j = 1; j <= n; j++)D[i][j] = 0;
	D[st][st] = 1;
	for (i = st; i >= 1; i--)for (j = st; j <= n; j++) {
		if (!D[i][j])continue;
		int t = j - i + 1;
		if (j != n && X[j + 1] - X[i] <= t*L*2)D[i][j + 1] = 1;
		if (i != 1 && X[j] - X[i - 1] <= t*L*2)D[i-1][j] = 1;
	}
	if (D[1][n])return true;
	return false;
}
int main() {
	int i;
	scanf("%d%d%lld", &n, &st, &T);
	for (i = 1; i <= n; i++) {
		scanf("%lld", &X[i]);
	}
	long long b = 0, e = 1e9, mid, res;
	while (b <= e) {
		mid = (b + e) / 2;
		if (Pos(mid)) {
			res = mid;
			e = mid - 1;
		}
		else b = mid + 1;
	}
	printf("%d\n", res);
}

Compilation message

sparklers.cpp: In function 'int main()':
sparklers.cpp:38:20: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
  printf("%d\n", res);
                    ^
sparklers.cpp:25:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%lld", &n, &st, &T);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
sparklers.cpp:27:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld", &X[i]);
   ~~~~~^~~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 2 ms 432 KB Output is correct
5 Correct 3 ms 480 KB Output is correct
6 Correct 2 ms 516 KB Output is correct
7 Correct 2 ms 516 KB Output is correct
8 Correct 2 ms 544 KB Output is correct
9 Correct 3 ms 724 KB Output is correct
10 Correct 3 ms 724 KB Output is correct
11 Correct 2 ms 724 KB Output is correct
12 Correct 2 ms 724 KB Output is correct
13 Correct 3 ms 724 KB Output is correct
14 Correct 3 ms 724 KB Output is correct
15 Correct 3 ms 724 KB Output is correct
16 Correct 2 ms 724 KB Output is correct
17 Correct 3 ms 724 KB Output is correct
18 Correct 3 ms 724 KB Output is correct
19 Correct 3 ms 748 KB Output is correct
20 Correct 2 ms 748 KB Output is correct
21 Correct 3 ms 748 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 2 ms 432 KB Output is correct
5 Correct 3 ms 480 KB Output is correct
6 Correct 2 ms 516 KB Output is correct
7 Correct 2 ms 516 KB Output is correct
8 Correct 2 ms 544 KB Output is correct
9 Correct 3 ms 724 KB Output is correct
10 Correct 3 ms 724 KB Output is correct
11 Correct 2 ms 724 KB Output is correct
12 Correct 2 ms 724 KB Output is correct
13 Correct 3 ms 724 KB Output is correct
14 Correct 3 ms 724 KB Output is correct
15 Correct 3 ms 724 KB Output is correct
16 Correct 2 ms 724 KB Output is correct
17 Correct 3 ms 724 KB Output is correct
18 Correct 3 ms 724 KB Output is correct
19 Correct 3 ms 748 KB Output is correct
20 Correct 2 ms 748 KB Output is correct
21 Correct 3 ms 748 KB Output is correct
22 Correct 30 ms 3452 KB Output is correct
23 Correct 15 ms 3452 KB Output is correct
24 Correct 18 ms 3500 KB Output is correct
25 Correct 33 ms 4604 KB Output is correct
26 Correct 39 ms 4604 KB Output is correct
27 Correct 31 ms 4604 KB Output is correct
28 Correct 43 ms 4604 KB Output is correct
29 Correct 41 ms 4604 KB Output is correct
30 Correct 33 ms 4604 KB Output is correct
31 Correct 36 ms 4604 KB Output is correct
32 Correct 45 ms 4604 KB Output is correct
33 Correct 49 ms 4604 KB Output is correct
34 Correct 32 ms 4604 KB Output is correct
35 Correct 37 ms 4604 KB Output is correct
36 Correct 28 ms 4604 KB Output is correct
37 Correct 36 ms 4604 KB Output is correct
38 Correct 40 ms 4604 KB Output is correct
39 Correct 32 ms 4604 KB Output is correct
40 Correct 43 ms 4604 KB Output is correct

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 2 ms 432 KB Output is correct
5 Correct 3 ms 480 KB Output is correct
6 Correct 2 ms 516 KB Output is correct
7 Correct 2 ms 516 KB Output is correct
8 Correct 2 ms 544 KB Output is correct
9 Correct 3 ms 724 KB Output is correct
10 Correct 3 ms 724 KB Output is correct
11 Correct 2 ms 724 KB Output is correct
12 Correct 2 ms 724 KB Output is correct
13 Correct 3 ms 724 KB Output is correct
14 Correct 3 ms 724 KB Output is correct
15 Correct 3 ms 724 KB Output is correct
16 Correct 2 ms 724 KB Output is correct
17 Correct 3 ms 724 KB Output is correct
18 Correct 3 ms 724 KB Output is correct
19 Correct 3 ms 748 KB Output is correct
20 Correct 2 ms 748 KB Output is correct
21 Correct 3 ms 748 KB Output is correct
22 Correct 30 ms 3452 KB Output is correct
23 Correct 15 ms 3452 KB Output is correct
24 Correct 18 ms 3500 KB Output is correct
25 Correct 33 ms 4604 KB Output is correct
26 Correct 39 ms 4604 KB Output is correct
27 Correct 31 ms 4604 KB Output is correct
28 Correct 43 ms 4604 KB Output is correct
29 Correct 41 ms 4604 KB Output is correct
30 Correct 33 ms 4604 KB Output is correct
31 Correct 36 ms 4604 KB Output is correct
32 Correct 45 ms 4604 KB Output is correct
33 Correct 49 ms 4604 KB Output is correct
34 Correct 32 ms 4604 KB Output is correct
35 Correct 37 ms 4604 KB Output is correct
36 Correct 28 ms 4604 KB Output is correct
37 Correct 36 ms 4604 KB Output is correct
38 Correct 40 ms 4604 KB Output is correct
39 Correct 32 ms 4604 KB Output is correct
40 Correct 43 ms 4604 KB Output is correct
41 Runtime error 3 ms 4604 KB Execution killed with signal 11 (could be triggered by violating memory limits)
42 Halted 0 ms 0 KB -