oj.uz

Submission #367500

# Submission time Handle Problem Language Result Execution time Memory
367500 2021-02-17T13:58:09 Z balbit Port Facility (JOI17_port_facility) C++14
100 / 100
 1207 ms 172776 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define y1 zck_is_king
#define pii pair<int, int>
#define ull unsigned ll
#define f first
#define s second
#define ALL(x) x.begin(),x.end()
#define SZ(x) (int)x.size()
#define SQ(x) (x)*(x)
#define MN(a,b) a = min(a,(__typeof__(a))(b))
#define MX(a,b) a = max(a,(__typeof__(a))(b))
#define pb push_back
#define REP(i,n) for (int i = 0; i<n; ++i)
#define RREP(i,n) for (int i = n-1; i>=0; --i)
#define REP1(i,n) for (int i = 1; i<=n; ++i)
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
#ifdef BALBIT
#define IOS()
#define bug(...) fprintf(stderr,"#%d (%s) = ",__LINE__,#__VA_ARGS__),_do(__VA_ARGS__);
template<typename T> void _do(T &&x){cerr<<x<<endl;}
template<typename T, typename ...S> void _do(T &&x, S &&...y){cerr<<x<<", ";_do(y...);}
#else
#define IOS() ios_base::sync_with_stdio(0);cin.tie(0);
#define endl '\n'
#define bug(...)
#endif

const int iinf = 1e9+10;
const ll inf = 1ll<<60;
const ll mod = 1e9+7 ;


void GG(){cout<<"0\n"; exit(0);}

ll mpow(ll a, ll n, ll mo = mod){ // a^n % mod
    ll re=1;
    while (n>0){
        if (n&1) re = re*a %mo;
        a = a*a %mo;
        n>>=1;
    }
    return re;
}

ll inv (ll b, ll mo = mod){
    if (b==1) return b;
    return (mo-mo/b) * inv(mo%b,mo) % mo;
}

const int maxn = 2e6+5;

int par[maxn];
int find(int x) {return x==par[x]?x:par[x] = find(par[x]);}

int cc = 0;

vector<int> g[maxn];

void mg(int a, int b) {
    int A=find(a), B=find(b);
    if (A!=B) {
        --cc;
        par[A] = B;
        g[a].pb(b); g[b].pb(a);
        bug(a,b);
    }
}

int col[maxn];

void dfs(int v) {
    for (int u : g[v]) {
        if (col[u] == -1) {
            col[u] = col[v] ^ 1;
            dfs(u);
        }
    }
}

struct seg{
    int l,r,i;
};

int who[maxn];
bool pluck[maxn];

signed main(){
    IOS();
    memset(col, -1, sizeof col);
    int n; cin>>n;
    REP(i,n) par[i] = i;
    vector<seg> v;
    cc = n;

    REP(i,n) {
        int a,b; cin>>a>>b;
        v.pb({a,b,i});
        who[a]=who[b]=i; pluck[b] = 1;
    }
    REP(hi,2) {
        vector<seg>q;
        sort(ALL(v), [&](seg a, seg b){return a.r < b.r;});
        REP(i,n) {
            while (!q.empty() && q.back().l > v[i].l) q.pop_back();
            if (!q.empty() && q.back().r > v[i].l) {
                mg(v[i].i, q.back().i);
//                if (q.back().i==0 && v[i].i==2) {
//                    bug(q.back().r, v[i].l);
//                }
//                q.back().r = v[i].r; q.back().
//            }else{
            }
            q.pb(v[i]);

        }
//        bug("HO");
        for (seg & s : v) {
            s.l=-s.l; s.r=-s.r;
            swap(s.l, s.r);
        }
    }
    bug(cc);
    REP(i,n) {
        if (col[i] == -1) {
            col[i] = 0; dfs(i);
        }
    }
    REP(i,n) bug(i, col[i]);
    vector<int> s1,s2; s1.pb(-1); s2.pb(-1);
    REP1(i,2*n){
        if (pluck[i]) {
            if (s1.back()==who[i]) s1.pop_back();
            else if (s2.back()==who[i]) s2.pop_back();
            else GG();
        }else{
            (col[who[i]]?s1:s2).pb(who[i]);
        }
    }

    cout<<mpow(2,cc)<<endl;

}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 55148 KB Output is correct
2 Correct 35 ms 55148 KB Output is correct
3 Correct 35 ms 55148 KB Output is correct
4 Correct 35 ms 55148 KB Output is correct
5 Correct 35 ms 55148 KB Output is correct
6 Correct 35 ms 55148 KB Output is correct
7 Correct 35 ms 55148 KB Output is correct
8 Correct 35 ms 55148 KB Output is correct
9 Correct 36 ms 55276 KB Output is correct
10 Correct 35 ms 55148 KB Output is correct
11 Correct 35 ms 55148 KB Output is correct
12 Correct 35 ms 55148 KB Output is correct
13 Correct 36 ms 55148 KB Output is correct
14 Correct 35 ms 55148 KB Output is correct
15 Correct 35 ms 55148 KB Output is correct
16 Correct 36 ms 55148 KB Output is correct
17 Correct 37 ms 55148 KB Output is correct
18 Correct 35 ms 55148 KB Output is correct
19 Correct 36 ms 55148 KB Output is correct
20 Correct 36 ms 55148 KB Output is correct
21 Correct 36 ms 55148 KB Output is correct
22 Correct 35 ms 55148 KB Output is correct
23 Correct 36 ms 55148 KB Output is correct
24 Correct 35 ms 55148 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 55148 KB Output is correct
2 Correct 35 ms 55148 KB Output is correct
3 Correct 35 ms 55148 KB Output is correct
4 Correct 35 ms 55148 KB Output is correct
5 Correct 35 ms 55148 KB Output is correct
6 Correct 35 ms 55148 KB Output is correct
7 Correct 35 ms 55148 KB Output is correct
8 Correct 35 ms 55148 KB Output is correct
9 Correct 36 ms 55276 KB Output is correct
10 Correct 35 ms 55148 KB Output is correct
11 Correct 35 ms 55148 KB Output is correct
12 Correct 35 ms 55148 KB Output is correct
13 Correct 36 ms 55148 KB Output is correct
14 Correct 35 ms 55148 KB Output is correct
15 Correct 35 ms 55148 KB Output is correct
16 Correct 36 ms 55148 KB Output is correct
17 Correct 37 ms 55148 KB Output is correct
18 Correct 35 ms 55148 KB Output is correct
19 Correct 36 ms 55148 KB Output is correct
20 Correct 36 ms 55148 KB Output is correct
21 Correct 36 ms 55148 KB Output is correct
22 Correct 35 ms 55148 KB Output is correct
23 Correct 36 ms 55148 KB Output is correct
24 Correct 35 ms 55148 KB Output is correct
25 Correct 37 ms 55276 KB Output is correct
26 Correct 38 ms 55276 KB Output is correct
27 Correct 37 ms 55276 KB Output is correct
28 Correct 37 ms 55276 KB Output is correct
29 Correct 37 ms 55276 KB Output is correct
30 Correct 37 ms 55276 KB Output is correct
31 Correct 37 ms 55276 KB Output is correct
32 Correct 38 ms 55276 KB Output is correct
33 Correct 37 ms 55276 KB Output is correct
34 Correct 37 ms 55276 KB Output is correct
35 Correct 36 ms 55276 KB Output is correct
36 Correct 36 ms 55276 KB Output is correct
37 Correct 36 ms 55404 KB Output is correct
38 Correct 36 ms 55404 KB Output is correct
39 Correct 36 ms 55276 KB Output is correct
40 Correct 36 ms 55276 KB Output is correct
41 Correct 36 ms 55276 KB Output is correct
42 Correct 36 ms 55276 KB Output is correct
43 Correct 36 ms 55404 KB Output is correct
44 Correct 36 ms 55404 KB Output is correct

Subtask #3
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 55148 KB Output is correct
2 Correct 35 ms 55148 KB Output is correct
3 Correct 35 ms 55148 KB Output is correct
4 Correct 35 ms 55148 KB Output is correct
5 Correct 35 ms 55148 KB Output is correct
6 Correct 35 ms 55148 KB Output is correct
7 Correct 35 ms 55148 KB Output is correct
8 Correct 35 ms 55148 KB Output is correct
9 Correct 36 ms 55276 KB Output is correct
10 Correct 35 ms 55148 KB Output is correct
11 Correct 35 ms 55148 KB Output is correct
12 Correct 35 ms 55148 KB Output is correct
13 Correct 36 ms 55148 KB Output is correct
14 Correct 35 ms 55148 KB Output is correct
15 Correct 35 ms 55148 KB Output is correct
16 Correct 36 ms 55148 KB Output is correct
17 Correct 37 ms 55148 KB Output is correct
18 Correct 35 ms 55148 KB Output is correct
19 Correct 36 ms 55148 KB Output is correct
20 Correct 36 ms 55148 KB Output is correct
21 Correct 36 ms 55148 KB Output is correct
22 Correct 35 ms 55148 KB Output is correct
23 Correct 36 ms 55148 KB Output is correct
24 Correct 35 ms 55148 KB Output is correct
25 Correct 37 ms 55276 KB Output is correct
26 Correct 38 ms 55276 KB Output is correct
27 Correct 37 ms 55276 KB Output is correct
28 Correct 37 ms 55276 KB Output is correct
29 Correct 37 ms 55276 KB Output is correct
30 Correct 37 ms 55276 KB Output is correct
31 Correct 37 ms 55276 KB Output is correct
32 Correct 38 ms 55276 KB Output is correct
33 Correct 37 ms 55276 KB Output is correct
34 Correct 37 ms 55276 KB Output is correct
35 Correct 36 ms 55276 KB Output is correct
36 Correct 36 ms 55276 KB Output is correct
37 Correct 36 ms 55404 KB Output is correct
38 Correct 36 ms 55404 KB Output is correct
39 Correct 36 ms 55276 KB Output is correct
40 Correct 36 ms 55276 KB Output is correct
41 Correct 36 ms 55276 KB Output is correct
42 Correct 36 ms 55276 KB Output is correct
43 Correct 36 ms 55404 KB Output is correct
44 Correct 36 ms 55404 KB Output is correct
45 Correct 95 ms 60640 KB Output is correct
46 Correct 96 ms 60640 KB Output is correct
47 Correct 100 ms 60660 KB Output is correct
48 Correct 97 ms 60768 KB Output is correct
49 Correct 96 ms 60768 KB Output is correct
50 Correct 97 ms 60512 KB Output is correct
51 Correct 93 ms 61024 KB Output is correct
52 Correct 71 ms 60364 KB Output is correct
53 Correct 69 ms 58476 KB Output is correct
54 Correct 97 ms 64440 KB Output is correct
55 Correct 95 ms 63436 KB Output is correct
56 Correct 97 ms 63436 KB Output is correct
57 Correct 89 ms 63564 KB Output is correct
58 Correct 70 ms 59104 KB Output is correct
59 Correct 79 ms 58976 KB Output is correct
60 Correct 92 ms 59872 KB Output is correct
61 Correct 94 ms 60512 KB Output is correct
62 Correct 85 ms 59744 KB Output is correct
63 Correct 92 ms 60000 KB Output is correct
64 Correct 94 ms 60256 KB Output is correct
65 Correct 104 ms 61280 KB Output is correct
66 Correct 100 ms 61280 KB Output is correct
67 Correct 87 ms 61792 KB Output is correct
68 Correct 90 ms 61920 KB Output is correct
69 Correct 89 ms 62448 KB Output is correct
70 Correct 86 ms 62176 KB Output is correct
71 Correct 85 ms 61792 KB Output is correct
72 Correct 83 ms 61792 KB Output is correct
73 Correct 85 ms 62204 KB Output is correct
74 Correct 85 ms 62048 KB Output is correct
75 Correct 99 ms 63800 KB Output is correct
76 Correct 96 ms 63564 KB Output is correct
77 Correct 97 ms 64824 KB Output is correct
78 Correct 97 ms 60640 KB Output is correct
79 Correct 96 ms 60768 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 55148 KB Output is correct
2 Correct 35 ms 55148 KB Output is correct
3 Correct 35 ms 55148 KB Output is correct
4 Correct 35 ms 55148 KB Output is correct
5 Correct 35 ms 55148 KB Output is correct
6 Correct 35 ms 55148 KB Output is correct
7 Correct 35 ms 55148 KB Output is correct
8 Correct 35 ms 55148 KB Output is correct
9 Correct 36 ms 55276 KB Output is correct
10 Correct 35 ms 55148 KB Output is correct
11 Correct 35 ms 55148 KB Output is correct
12 Correct 35 ms 55148 KB Output is correct
13 Correct 36 ms 55148 KB Output is correct
14 Correct 35 ms 55148 KB Output is correct
15 Correct 35 ms 55148 KB Output is correct
16 Correct 36 ms 55148 KB Output is correct
17 Correct 37 ms 55148 KB Output is correct
18 Correct 35 ms 55148 KB Output is correct
19 Correct 36 ms 55148 KB Output is correct
20 Correct 36 ms 55148 KB Output is correct
21 Correct 36 ms 55148 KB Output is correct
22 Correct 35 ms 55148 KB Output is correct
23 Correct 36 ms 55148 KB Output is correct
24 Correct 35 ms 55148 KB Output is correct
25 Correct 37 ms 55276 KB Output is correct
26 Correct 38 ms 55276 KB Output is correct
27 Correct 37 ms 55276 KB Output is correct
28 Correct 37 ms 55276 KB Output is correct
29 Correct 37 ms 55276 KB Output is correct
30 Correct 37 ms 55276 KB Output is correct
31 Correct 37 ms 55276 KB Output is correct
32 Correct 38 ms 55276 KB Output is correct
33 Correct 37 ms 55276 KB Output is correct
34 Correct 37 ms 55276 KB Output is correct
35 Correct 36 ms 55276 KB Output is correct
36 Correct 36 ms 55276 KB Output is correct
37 Correct 36 ms 55404 KB Output is correct
38 Correct 36 ms 55404 KB Output is correct
39 Correct 36 ms 55276 KB Output is correct
40 Correct 36 ms 55276 KB Output is correct
41 Correct 36 ms 55276 KB Output is correct
42 Correct 36 ms 55276 KB Output is correct
43 Correct 36 ms 55404 KB Output is correct
44 Correct 36 ms 55404 KB Output is correct
45 Correct 95 ms 60640 KB Output is correct
46 Correct 96 ms 60640 KB Output is correct
47 Correct 100 ms 60660 KB Output is correct
48 Correct 97 ms 60768 KB Output is correct
49 Correct 96 ms 60768 KB Output is correct
50 Correct 97 ms 60512 KB Output is correct
51 Correct 93 ms 61024 KB Output is correct
52 Correct 71 ms 60364 KB Output is correct
53 Correct 69 ms 58476 KB Output is correct
54 Correct 97 ms 64440 KB Output is correct
55 Correct 95 ms 63436 KB Output is correct
56 Correct 97 ms 63436 KB Output is correct
57 Correct 89 ms 63564 KB Output is correct
58 Correct 70 ms 59104 KB Output is correct
59 Correct 79 ms 58976 KB Output is correct
60 Correct 92 ms 59872 KB Output is correct
61 Correct 94 ms 60512 KB Output is correct
62 Correct 85 ms 59744 KB Output is correct
63 Correct 92 ms 60000 KB Output is correct
64 Correct 94 ms 60256 KB Output is correct
65 Correct 104 ms 61280 KB Output is correct
66 Correct 100 ms 61280 KB Output is correct
67 Correct 87 ms 61792 KB Output is correct
68 Correct 90 ms 61920 KB Output is correct
69 Correct 89 ms 62448 KB Output is correct
70 Correct 86 ms 62176 KB Output is correct
71 Correct 85 ms 61792 KB Output is correct
72 Correct 83 ms 61792 KB Output is correct
73 Correct 85 ms 62204 KB Output is correct
74 Correct 85 ms 62048 KB Output is correct
75 Correct 99 ms 63800 KB Output is correct
76 Correct 96 ms 63564 KB Output is correct
77 Correct 97 ms 64824 KB Output is correct
78 Correct 97 ms 60640 KB Output is correct
79 Correct 96 ms 60768 KB Output is correct
80 Correct 991 ms 109888 KB Output is correct
81 Correct 1000 ms 124224 KB Output is correct
82 Correct 1016 ms 124996 KB Output is correct
83 Correct 1006 ms 124992 KB Output is correct
84 Correct 1014 ms 124992 KB Output is correct
85 Correct 1207 ms 124508 KB Output is correct
86 Correct 1064 ms 124864 KB Output is correct
87 Correct 526 ms 119368 KB Output is correct
88 Correct 520 ms 102336 KB Output is correct
89 Correct 1039 ms 156344 KB Output is correct
90 Correct 1029 ms 150264 KB Output is correct
91 Correct 1022 ms 149732 KB Output is correct
92 Correct 941 ms 150664 KB Output is correct
93 Correct 524 ms 107328 KB Output is correct
94 Correct 756 ms 111936 KB Output is correct
95 Correct 959 ms 121536 KB Output is correct
96 Correct 987 ms 124480 KB Output is correct
97 Correct 817 ms 115460 KB Output is correct
98 Correct 1010 ms 121076 KB Output is correct
99 Correct 1024 ms 122432 KB Output is correct
100 Correct 1064 ms 130012 KB Output is correct
101 Correct 1077 ms 130196 KB Output is correct
102 Correct 962 ms 136040 KB Output is correct
103 Correct 894 ms 136000 KB Output is correct
104 Correct 947 ms 138176 KB Output is correct
105 Correct 972 ms 138152 KB Output is correct
106 Correct 970 ms 135488 KB Output is correct
107 Correct 951 ms 135360 KB Output is correct
108 Correct 936 ms 137408 KB Output is correct
109 Correct 917 ms 137572 KB Output is correct
110 Correct 1059 ms 172776 KB Output is correct
111 Correct 1060 ms 169888 KB Output is correct
112 Correct 1038 ms 161900 KB Output is correct
113 Correct 1008 ms 124864 KB Output is correct
114 Correct 1034 ms 124864 KB Output is correct