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Submission #947273

# Submission time Handle Problem Language Result Execution time Memory
947273 2024-03-15T20:40:39 Z NValchanov Boat (APIO16_boat) C++17
9 / 100
 2000 ms 370604 KB 
#include<bits/stdc++.h>

#define endl '\n'
#define a first
#define b second

using namespace std;

typedef long long ll;

const int MAXN = 500 + 10;
const int MAXA = 1e6 + 10;
const int MOD = 1e9 + 7;

int n,cnt;
int a[MAXN];
int b[MAXN];
int dp[MAXA];
int pref[MAXA];
unordered_map <int,int> pos;

void read()
{
    cin >> n;
    for(int i = 1; i <= n; i++)
    {
        cin >> a[i] >> b[i];
    }
    a[0] = b[0] = -1;
}

void fill_pos()
{
    set <int> st;

    for(int i = 1; i <= n; i++)
    {
        int from = a[i];
        int to = b[i];

        for(int j = from; j <= to; j++)
        {
            st.insert(j);
        }
    }

    int last = -1;

    for(int cur : st)
    {
        if(cur == last)
            continue;

        pos[cur] = ++cnt;
        last = cur;
    }
    /**
    for(auto x : pos)
    {
        cout << x.first << " " << x.second << endl;
    }
    */
}

void fill_dp()
{
    for(int i = 1; i <= n; i++)
    {
        int from = pos[a[i]];
        int to = pos[b[i]];
        for(int j = to; j >= from; j--)
        {
            dp[j] = (dp[j] + pref[j - 1] + 1 /** za nulata **/) % MOD;
        }
        for(int j = from; j <= cnt; j++)
        {
            pref[j] = (pref[j - 1] + dp[j]) % MOD;
        }
    }
}

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);

    read();
    fill_pos();
    fill_dp();

    cout << pref[cnt] << endl;

	return 0;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 31 ms 1368 KB Output is correct
22 Correct 28 ms 860 KB Output is correct
23 Correct 27 ms 860 KB Output is correct
24 Correct 29 ms 856 KB Output is correct
25 Correct 28 ms 1016 KB Output is correct
26 Correct 27 ms 604 KB Output is correct
27 Correct 27 ms 604 KB Output is correct
28 Correct 27 ms 604 KB Output is correct
29 Correct 30 ms 600 KB Output is correct
30 Execution timed out 2065 ms 96368 KB Time limit exceeded
31 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2097 ms 370604 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 31 ms 1368 KB Output is correct
22 Correct 28 ms 860 KB Output is correct
23 Correct 27 ms 860 KB Output is correct
24 Correct 29 ms 856 KB Output is correct
25 Correct 28 ms 1016 KB Output is correct
26 Correct 27 ms 604 KB Output is correct
27 Correct 27 ms 604 KB Output is correct
28 Correct 27 ms 604 KB Output is correct
29 Correct 30 ms 600 KB Output is correct
30 Execution timed out 2065 ms 96368 KB Time limit exceeded
31 Halted 0 ms 0 KB -