oj.uz

Submission #45120

# Submission time Handle Problem Language Result Execution time Memory
45120 2018-04-11T10:14:13 Z model_code Shell (info1cup18_shell) C++17
100 / 100
 439 ms 35248 KB 
#include <cstdio>
#include <algorithm>
#include <vector>
#include <cassert>

#define MOD 1000000007LL

using namespace std;

int n, m, p;
vector <int> g[1000010];
int dp[1000010], v[1000010];
long long nr[1000010];

void dfs (int nod)
{
    if (nod == n)
    {
        dp[nod] = 1;
        nr[nod] = 1LL;

        if (nod == v[ p - dp[nod] + 1 ]) ++dp[nod];
        return;
    }

    for (auto &it : g[nod])
    {
        if (dp[it] == 0) dfs (it);

        if (dp[it] > dp[nod]) dp[nod] = dp[it], nr[nod] = nr[it];
        else if (dp[it] == dp[nod]) nr[nod] += nr[it];

        nr[nod] %= MOD;
    }

    if (nod == v[ p - dp[nod] + 1 ]) ++dp[nod];
}

int main ()
{
  //  freopen ("input", "r", stdin);
  //  freopen ("output1", "w", stdout);

    scanf ("%d %d %d", &n, &m, &p);

    assert (1 <= n && n <= 1000000);
  //  assert (1 <= m && m <= 1000000);
    assert (1 <= p && p <= 1000000);

    for (int i = 1; i <= p; ++i)
    {
        scanf ("%d", &v[i]);
        assert (1 <= v[i] && v[i] <= n);
    }

    for (int i = 1; i <= m; ++i)
    {
        int x, y;
        scanf ("%d %d", &x, &y);

        assert (1 <= x && x <= n);
        assert (1 <= y && y <= n);
        assert (x != y);

        g[x].push_back (y);
    }

    dfs (1);

    printf ("%lld\n", nr[1]);

    return 0;
}

Compilation message

shell.cpp: In function 'int main()':
shell.cpp:44:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf ("%d %d %d", &n, &m, &p);
     ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
shell.cpp:52:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf ("%d", &v[i]);
         ~~~~~~^~~~~~~~~~~~~
shell.cpp:59:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf ("%d %d", &x, &y);
         ~~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 23800 KB Output is correct
2 Correct 19 ms 23800 KB Output is correct
3 Correct 19 ms 23840 KB Output is correct
4 Correct 20 ms 24020 KB Output is correct
5 Correct 22 ms 24020 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 23800 KB Output is correct
2 Correct 19 ms 23800 KB Output is correct
3 Correct 19 ms 23840 KB Output is correct
4 Correct 20 ms 24020 KB Output is correct
5 Correct 22 ms 24020 KB Output is correct
6 Correct 21 ms 24096 KB Output is correct
7 Correct 26 ms 24224 KB Output is correct
8 Correct 25 ms 24224 KB Output is correct
9 Correct 28 ms 24240 KB Output is correct
10 Correct 28 ms 24292 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 24292 KB Output is correct
2 Correct 141 ms 26904 KB Output is correct
3 Correct 125 ms 26904 KB Output is correct
4 Correct 120 ms 26904 KB Output is correct
5 Correct 118 ms 26904 KB Output is correct
6 Correct 251 ms 30828 KB Output is correct
7 Correct 265 ms 30868 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 23800 KB Output is correct
2 Correct 19 ms 23800 KB Output is correct
3 Correct 19 ms 23840 KB Output is correct
4 Correct 20 ms 24020 KB Output is correct
5 Correct 22 ms 24020 KB Output is correct
6 Correct 21 ms 24096 KB Output is correct
7 Correct 26 ms 24224 KB Output is correct
8 Correct 25 ms 24224 KB Output is correct
9 Correct 28 ms 24240 KB Output is correct
10 Correct 28 ms 24292 KB Output is correct
11 Correct 21 ms 24292 KB Output is correct
12 Correct 141 ms 26904 KB Output is correct
13 Correct 125 ms 26904 KB Output is correct
14 Correct 120 ms 26904 KB Output is correct
15 Correct 118 ms 26904 KB Output is correct
16 Correct 251 ms 30828 KB Output is correct
17 Correct 265 ms 30868 KB Output is correct
18 Correct 438 ms 35248 KB Output is correct
19 Correct 439 ms 35248 KB Output is correct
20 Correct 401 ms 35248 KB Output is correct
21 Correct 173 ms 35248 KB Output is correct
22 Correct 424 ms 35248 KB Output is correct