oj.uz

Submission #46891

# Submission time Handle Problem Language Result Execution time Memory
46891 2018-04-24T14:47:25 Z SpaimaCarpatilor Sparklers (JOI17_sparklers) C++17
0 / 100
 11 ms 4672 KB 
#include<bits/stdc++.h>

using namespace std;

int N, K, T, x[100009];
bool dp[2018][2018];

bool ok (int S)
{
    memset (dp, 0, sizeof (dp));
    dp[K][K] = 1;///j is the last visited
    for (int i=K; i>=1; i--)
        for (int j=K; j<=N; j++)
        {
            if (x[j] - x[i] > 2LL * S * T * (j - i) || dp[i][j] == 0)
            {
                dp[i][j] = 0;
                continue;
            }
            dp[i - 1][j] |= dp[i][j], dp[i][j + 1] |= dp[i][j];
        }
    return dp[1][N];
}

int main ()
{
//freopen ("input", "r", stdin);
//freopen ("output", "w", stdout);

scanf ("%d %d %d", &N, &K, &T);
for (int i=1; i<=N; i++)
    scanf ("%d", &x[i]);
int p = 1, u = (x[N] - x[1]) / T + 1, mij, ras = -1;
while (p <= u)
{
    mij = (p + u) >> 1;
    if (ok (mij)) ras = mij, u = mij - 1;
    else p = mij + 1;
}
printf ("%d\n", ras);
return 0;
}

Compilation message

sparklers.cpp: In function 'int main()':
sparklers.cpp:30:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf ("%d %d %d", &N, &K, &T);
 ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sparklers.cpp:32:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf ("%d", &x[i]);
     ~~~~~~^~~~~~~~~~~~~

Subtask #1
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 4344 KB Output is correct
2 Correct 9 ms 4344 KB Output is correct
3 Correct 10 ms 4532 KB Output is correct
4 Correct 10 ms 4532 KB Output is correct
5 Correct 10 ms 4568 KB Output is correct
6 Correct 9 ms 4568 KB Output is correct
7 Correct 11 ms 4568 KB Output is correct
8 Correct 11 ms 4568 KB Output is correct
9 Correct 10 ms 4672 KB Output is correct
10 Correct 9 ms 4672 KB Output is correct
11 Correct 11 ms 4672 KB Output is correct
12 Correct 10 ms 4672 KB Output is correct
13 Correct 11 ms 4672 KB Output is correct
14 Correct 11 ms 4672 KB Output is correct
15 Correct 9 ms 4672 KB Output is correct
16 Correct 9 ms 4672 KB Output is correct
17 Correct 11 ms 4672 KB Output is correct
18 Correct 10 ms 4672 KB Output is correct
19 Incorrect 5 ms 4672 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 4344 KB Output is correct
2 Correct 9 ms 4344 KB Output is correct
3 Correct 10 ms 4532 KB Output is correct
4 Correct 10 ms 4532 KB Output is correct
5 Correct 10 ms 4568 KB Output is correct
6 Correct 9 ms 4568 KB Output is correct
7 Correct 11 ms 4568 KB Output is correct
8 Correct 11 ms 4568 KB Output is correct
9 Correct 10 ms 4672 KB Output is correct
10 Correct 9 ms 4672 KB Output is correct
11 Correct 11 ms 4672 KB Output is correct
12 Correct 10 ms 4672 KB Output is correct
13 Correct 11 ms 4672 KB Output is correct
14 Correct 11 ms 4672 KB Output is correct
15 Correct 9 ms 4672 KB Output is correct
16 Correct 9 ms 4672 KB Output is correct
17 Correct 11 ms 4672 KB Output is correct
18 Correct 10 ms 4672 KB Output is correct
19 Incorrect 5 ms 4672 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 4344 KB Output is correct
2 Correct 9 ms 4344 KB Output is correct
3 Correct 10 ms 4532 KB Output is correct
4 Correct 10 ms 4532 KB Output is correct
5 Correct 10 ms 4568 KB Output is correct
6 Correct 9 ms 4568 KB Output is correct
7 Correct 11 ms 4568 KB Output is correct
8 Correct 11 ms 4568 KB Output is correct
9 Correct 10 ms 4672 KB Output is correct
10 Correct 9 ms 4672 KB Output is correct
11 Correct 11 ms 4672 KB Output is correct
12 Correct 10 ms 4672 KB Output is correct
13 Correct 11 ms 4672 KB Output is correct
14 Correct 11 ms 4672 KB Output is correct
15 Correct 9 ms 4672 KB Output is correct
16 Correct 9 ms 4672 KB Output is correct
17 Correct 11 ms 4672 KB Output is correct
18 Correct 10 ms 4672 KB Output is correct
19 Incorrect 5 ms 4672 KB Output isn't correct
20 Halted 0 ms 0 KB -