oj.uz

답안 #1090552

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1090552 2024-09-18T12:44:32 Z BigBadBully Fire (BOI24_fire) C++17
13 / 100
 53 ms 10820 KB 
#include <bits/stdc++.h>
#define ff first
#define ss second
#define int long long
#define pii pair<int, int>
#define ff first
#define ss second
using namespace std;
const int inf = 1e17;
const int mod = 998244353;


void solve()
{
    int n,m;
    cin >> n >> m;
    vector<pii> v(n);
    for (int i = 0; i< n; i++)
    {
        cin >> v[i].ff >> v[i].ss;
        while(v[i].ff>v[i].ss)
            v[i].ss+=m;
    }
    sort(v.begin(),v.end());
    {
    vector<bool> del(n);
    int maxi = 0;
    for (int i = 0; i < n;i ++)
    {
        if (v[i].ss <= maxi)
            del[i] = 1;
        maxi = max(maxi,v[i].ss);
    }
    vector<pii> neu;
    for (int i = 0; i < n; i++)
        if (!del[i])
            neu.push_back(v[i]);
    n = neu.size();
    v = neu;
    }
    {
    vector<bool> del(n);
    int mini = v[n-1].ss;
    for (int i = n-1; i >= 0;i--)
    {
        if (v[i].ff >= mini)
            del[i] = 1;
        mini = min(mini,v[i].ff);
    }
    vector<pii> neu;
    for (int i = 0; i < n; i++)
        if (!del[i])
            neu.push_back(v[i]);
    n = neu.size();
    v = neu;
    }
    
    for (int i = 0; i< n;i++)
        v[i].ss%=m;
    /*for (int i = 0; i < n; i++)
        cout << v[i].ff << ' ' << v[i].ss << '\n';*/
    {
        int bigie = 0;
        for (int i = 0; i < n; i++)
            if (v[i].ff > v[i].ss)
                bigie = max(bigie,v[i].ss);
        vector<bool> del(n);
        for (int i = 0; i < n; i++)
            if (v[i].ff < v[i].ss && v[i].ss < bigie)
                del[i] = 1;
        vector<pii> neu;
        for (int i = 0; i < n; i++)
            if (!del[i])
                neu.push_back(v[i]);
        n = neu.size();
        v = neu;        
    }
    int prev = v[0].ss;
    int used = 1;
    if (v[0].ff != 0)
    {
        cout << -1 << '\n';
        return;
    }
    for (int i = 1; i < n; i++)
    {
        if (v[i].ff > prev)
        {
            used++;
            prev = v[i-1].ss;
            if (v[i].ff > prev)
            {
                cout << -1 << '\n';
                return;
            }
        }
        if (prev != 0 && v[i].ss == 0)
        {
            used++;
            break;
        }
    }
    cout << used << '\n';
}


signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    
    solve();
}

Subtask #1
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 360 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 700 KB Output is correct
16 Correct 1 ms 700 KB Output is correct
17 Correct 2 ms 348 KB Output is correct
18 Correct 2 ms 704 KB Output is correct
19 Correct 2 ms 348 KB Output is correct
20 Correct 21 ms 3600 KB Output is correct
21 Correct 53 ms 4340 KB Output is correct
22 Correct 40 ms 4284 KB Output is correct
23 Correct 45 ms 10820 KB Output is correct
24 Correct 49 ms 9996 KB Output is correct
25 Correct 38 ms 4748 KB Output is correct
26 Correct 44 ms 7140 KB Output is correct
27 Correct 52 ms 10716 KB Output is correct
28 Correct 40 ms 4004 KB Output is correct

Subtask #5
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Incorrect 0 ms 348 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #6
0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -