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답안 #947271

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
947271 2024-03-15T20:38:29 Z NValchanov Boat (APIO16_boat) C++17
9 / 100
 2000 ms 364508 KB 
#include<bits/stdc++.h>

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

using namespace std;

typedef long long ll;

const int MAXN = 1e5 + 10;
const int MAXA = 1e6 + 10;
const int MOD = 1e9 + 7;

int n,cnt;
int a[MAXN];
int b[MAXN];
int dp[MAXN];
int pref[MAXN];
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

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 600 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 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 344 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 600 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

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 600 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 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 344 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 600 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 29 ms 860 KB Output is correct
22 Correct 31 ms 860 KB Output is correct
23 Correct 27 ms 988 KB Output is correct
24 Correct 31 ms 868 KB Output is correct
25 Correct 28 ms 860 KB Output is correct
26 Correct 27 ms 860 KB Output is correct
27 Correct 27 ms 604 KB Output is correct
28 Correct 27 ms 604 KB Output is correct
29 Correct 27 ms 860 KB Output is correct
30 Runtime error 308 ms 181400 KB Execution killed with signal 11
31 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 2063 ms 364508 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 600 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 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 344 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 600 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 29 ms 860 KB Output is correct
22 Correct 31 ms 860 KB Output is correct
23 Correct 27 ms 988 KB Output is correct
24 Correct 31 ms 868 KB Output is correct
25 Correct 28 ms 860 KB Output is correct
26 Correct 27 ms 860 KB Output is correct
27 Correct 27 ms 604 KB Output is correct
28 Correct 27 ms 604 KB Output is correct
29 Correct 27 ms 860 KB Output is correct
30 Runtime error 308 ms 181400 KB Execution killed with signal 11
31 Halted 0 ms 0 KB -