Submission #1116428

#	Time	Username	Problem	Language	Result	Execution time	Memory
1116428		ShaShi	Port Facility (JOI17_port_facility)	C++17	0 / 100	2 ms	10576 KiB

port_facility

#include <bits/stdc++.h>
 
#define int long long 
 
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
// #pragma GCC optimize("O3")
// #pragma GCC optimize("unroll-loops")
 
#define F first 
#define S second
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()
#define kill(x) cout << x << "\n", exit(0);
#define pii pair<int, int>
#define pll pair<long long, long long>
#define endl "\n"
 
 
 
using namespace std;
typedef long long ll;
// typedef __int128_t lll;
typedef long double ld;
 
 
const int MAXN = (int)1e6 + 7;
const int MOD = (int)1e9 + 7;
const ll INF = (ll)1e18 + 7;
const int LG = 30;
 
 
int n, m, k, tmp, t, tmp2, tmp3, tmp4, u, v, w, flag, q, ans, N, res, pre_ans;
pii arr[MAXN];


/* BIT */

int fen[2][MAXN];


inline void upd(int ind, int x, int y) {
    for (x++; x<MAXN; x+=x&-x) fen[ind][x] += y;
}


inline int get(int ind, int x) {
    int res = 0;
    for (x++; x>0; x-=x&-x) res += fen[ind][x];
    return res;
}


/* BIT */
 

int32_t main() {
    #ifdef LOCAL
    freopen("inp.in", "r", stdin);
    freopen("res.out", "w", stdout);
    #else
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    #endif


    cin >> n;

    for (int i=1; i<=n; i++) {
        cin >> arr[i].S >> arr[i].F;
    }

    sort(arr+1, arr+n+1);

    ans = 1;

    for (int i=1; i<=n; i++) {
        u = arr[i].S; v = arr[i].F;

        tmp = get(0, u);
        tmp2 = get(1, u);

        if (!tmp && !tmp2) ans = (ans+ans)%MOD;
        if (tmp && tmp2) kill(0);

        if (tmp) upd(1, u, 1), upd(1, v+1, -1);
        else upd(0, u, 1), upd(0, v+1, -1);
    }

    cout << ans << endl;

    
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 56
• Subtask 4: 0 / 22