oj.uz

Submission #946525

# Submission time Handle Problem Language Result Execution time Memory
946525 2024-03-14T18:07:47 Z n3rm1n Boat (APIO16_boat) C++17
9 / 100
 2000 ms 524288 KB 
/// boat
#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
const int MAXN = 505, MAXX = 1e6+10;
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
int n, m;
int a[MAXN], b[MAXN];
unordered_map < int, int > id;
vector < int > g, u;
void read_hash()
{
    cin >> n;
    for (int i = 1; i <= n; ++ i)
    {
        cin >> a[i] >> b[i];
        for (int j = a[i]; j <= b[i]; ++ j)
            g.push_back(j);
    }
    sort(g.begin(), g.end());
    u.push_back(g[0]);
    for (int i = 1; i < g.size(); ++ i)
    {
        if(u.back() != g[i])
            u.push_back(g[i]);
    }
    for (int i = 0; i < u.size(); ++ i)
    {
        id[u[i]] = i+1;
    }
}

int dp[MAXX];
const int mod = 1e9 + 7;
int pref[MAXX];
void solve()
{
    int ans = 0;
    int maxx = u.size();
    for (int i = 1; i <= n; ++ i)
    {
        for (int j = 1; j <= u.size(); ++ j)
            pref[j] = (pref[j-1] + dp[j]) % mod;
        for (int j = id[b[i]]; j >= id[a[i]]; -- j)
        {
            dp[j] += pref[j-1] + 1;
            dp[j] %= mod;
        }

    }
    for (int j = 1; j <= maxx; ++ j)
            pref[j] = (pref[j-1] + dp[j]) % mod;
    ans = pref[maxx];
    ans %= mod;
    cout << ans << endl;
}
int main()
{
    speed();

    read_hash();
    solve();
    return 0;
}

Compilation message

boat.cpp: In function 'void read_hash()':
boat.cpp:27:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for (int i = 1; i < g.size(); ++ i)
      |                     ~~^~~~~~~~~~
boat.cpp:32:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for (int i = 0; i < u.size(); ++ i)
      |                     ~~^~~~~~~~~~
boat.cpp: In function 'void solve()':
boat.cpp:47:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |         for (int j = 1; j <= u.size(); ++ j)
      |                         ~~^~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 348 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 2 ms 348 KB Output is correct
10 Correct 2 ms 348 KB Output is correct
11 Correct 2 ms 348 KB Output is correct
12 Correct 2 ms 348 KB Output is correct
13 Correct 2 ms 344 KB Output is correct
14 Correct 2 ms 348 KB Output is correct
15 Correct 2 ms 344 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 2 ms 348 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 2 ms 348 KB Output is correct
10 Correct 2 ms 348 KB Output is correct
11 Correct 2 ms 348 KB Output is correct
12 Correct 2 ms 348 KB Output is correct
13 Correct 2 ms 344 KB Output is correct
14 Correct 2 ms 348 KB Output is correct
15 Correct 2 ms 344 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 48 ms 4816 KB Output is correct
22 Correct 48 ms 6352 KB Output is correct
23 Correct 48 ms 5588 KB Output is correct
24 Correct 49 ms 5332 KB Output is correct
25 Correct 50 ms 5840 KB Output is correct
26 Correct 48 ms 5840 KB Output is correct
27 Correct 54 ms 4704 KB Output is correct
28 Correct 47 ms 6612 KB Output is correct
29 Correct 48 ms 6100 KB Output is correct
30 Execution timed out 2068 ms 56512 KB Time limit exceeded
31 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Runtime error 350 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 348 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 2 ms 348 KB Output is correct
10 Correct 2 ms 348 KB Output is correct
11 Correct 2 ms 348 KB Output is correct
12 Correct 2 ms 348 KB Output is correct
13 Correct 2 ms 344 KB Output is correct
14 Correct 2 ms 348 KB Output is correct
15 Correct 2 ms 344 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 48 ms 4816 KB Output is correct
22 Correct 48 ms 6352 KB Output is correct
23 Correct 48 ms 5588 KB Output is correct
24 Correct 49 ms 5332 KB Output is correct
25 Correct 50 ms 5840 KB Output is correct
26 Correct 48 ms 5840 KB Output is correct
27 Correct 54 ms 4704 KB Output is correct
28 Correct 47 ms 6612 KB Output is correct
29 Correct 48 ms 6100 KB Output is correct
30 Execution timed out 2068 ms 56512 KB Time limit exceeded
31 Halted 0 ms 0 KB -