oj.uz

Submission #329843

# Submission time Handle Problem Language Result Execution time Memory
329843 2020-11-22T21:55:46 Z milisav Port Facility (JOI17_port_facility) C++14
100 / 100
 3327 ms 301548 KB 
#include<bits/stdc++.h>
#define maxn 2500000
using namespace std;
int n;
int a[maxn];
int b[maxn];
int par[maxn];
int ord[maxn];
vector<int> c[maxn];
int d[maxn];
bool vis[maxn];
void dfs(int u) {
    vis[u]=true;
    for(auto v:c[u]) {
        if(!vis[v]) {
            d[v]=d[u]^1;
            dfs(v);
        }
    }
}
int act_c[4*maxn];
vector<int> cur_c;
priority_queue<int> pq[maxn];
long long mod=1000000007;
int find_par(int u) {
    if(par[u]==u) return u;
    par[u]=find_par(par[u]);
    return par[u];
}
void print_par() {
    for(int i=1;i<=n;i++) {
        cerr<<"par["<<i<<"]="<<par[i]<<endl;
    }
}
void unite(int u,int v) {
    if(pq[u].size()>pq[v].size()) swap(u,v);
    par[u]=v;
    while(!pq[u].empty()) {
        pq[v].push(pq[u].top());
        pq[u].pop();
    }
}
inline void clear(int id,int l,int r) {
    if(act_c[id]==0) return;
    if(l==r) {
        cur_c.push_back(-ord[l]);
        return;
    }
    act_c[id]=0;
    int m=(l+r)/2;
    clear(id*2+1,l,m);
    clear(id*2+2,m+1,r);
}
inline void active(int id,int l,int r,int x,int y) {
    if(x<=l && r<=y) {
        clear(id,l,r);
        return;
    }
    if(y<l || r<x) return;
    int m=(l+r)/2;
    active(id*2+1,l,m,x,y);
    active(id*2+2,m+1,r,x,y);
    act_c[id]=act_c[id*2+1]+act_c[id*2+2];
}
void update(int id,int l,int r,int p,int v) {
    if(l==r) {
        act_c[id]+=v;
        return;
    }
    int m=(l+r)/2;
    if(p<=m) update(id*2+1,l,m,p,v);
    else update(id*2+2,m+1,r,p,v);
    act_c[id]=act_c[id*2+1]+act_c[id*2+2];
}
stack<int> s[2];
int main() {
    scanf("%d",&n);
    for(int i=1;i<=n;i++) scanf("%d %d",&a[i],&b[i]);
    for(int i=1;i<=n;i++) {
        ord[a[i]]=i;
        ord[b[i]]=-i;
        par[i]=i;
        pq[i].push(-b[i]);
    }
    //cerr<<"ok1"<<endl;
    for(int i=1;i<=2*n;i++) {
        //cerr<<i<<" "<<ord[i]<<endl;
        if(ord[i]>0) {
            int j=ord[i];
            cur_c.clear();
            active(0,1,2*n,a[j],b[j]);
            for(auto comp:cur_c) {
                int u=find_par(comp);
                int v=find_par(j);
                if(u!=v) {
                    c[j].push_back(comp);
                    c[comp].push_back(j);
                    unite(u,v);
                }
            }
            int u=find_par(j);
            update(0,1,2*n,-pq[u].top(),1);
        }
        else {
            int j=-ord[i];
            //print_par();
            int u=find_par(j);
            //cerr<<j<<" "<<u<<" "<<pq[u].size()<<endl;
            update(0,1,2*n,-pq[u].top(),-1);
            pq[u].pop();
            if(!pq[u].empty()) update(0,1,2*n,-pq[u].top(),1);
        }
        //cerr<<"ok2."<<i<<endl;
    }
    //cerr<<"ok2"<<endl;
    //print_par();
    long long ans=1;
    for(int i=1;i<=n;i++) {
        if(!vis[i]) {
            dfs(i);
            ans=(ans*2)%mod;
        }
    }
    for(int i=1;i<=2*n;i++) {
        if(ord[i]>0) {
            int j=ord[i];
            s[d[j]].push(j);
        }
        else {
            int j=-ord[i];
            if(s[d[j]].top()!=j) {
                printf("0");
                return 0;
            }
            s[d[j]].pop();
        }
    }
    printf("%lld",ans);
    return 0;
}

Compilation message

port_facility.cpp: In function 'int main()':
port_facility.cpp:77:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   77 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
port_facility.cpp:78:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   78 |     for(int i=1;i<=n;i++) scanf("%d %d",&a[i],&b[i]);
      |                           ~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 137324 KB Output is correct
2 Correct 82 ms 137324 KB Output is correct
3 Correct 82 ms 137324 KB Output is correct
4 Correct 83 ms 137324 KB Output is correct
5 Correct 84 ms 137464 KB Output is correct
6 Correct 82 ms 137472 KB Output is correct
7 Correct 82 ms 137324 KB Output is correct
8 Correct 82 ms 137344 KB Output is correct
9 Correct 82 ms 137452 KB Output is correct
10 Correct 82 ms 137324 KB Output is correct
11 Correct 82 ms 137324 KB Output is correct
12 Correct 85 ms 137344 KB Output is correct
13 Correct 84 ms 137344 KB Output is correct
14 Correct 84 ms 137472 KB Output is correct
15 Correct 85 ms 137452 KB Output is correct
16 Correct 85 ms 137472 KB Output is correct
17 Correct 84 ms 137452 KB Output is correct
18 Correct 83 ms 137324 KB Output is correct
19 Correct 91 ms 137452 KB Output is correct
20 Correct 85 ms 137452 KB Output is correct
21 Correct 84 ms 137328 KB Output is correct
22 Correct 84 ms 137324 KB Output is correct
23 Correct 83 ms 137336 KB Output is correct
24 Correct 83 ms 137324 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 137324 KB Output is correct
2 Correct 82 ms 137324 KB Output is correct
3 Correct 82 ms 137324 KB Output is correct
4 Correct 83 ms 137324 KB Output is correct
5 Correct 84 ms 137464 KB Output is correct
6 Correct 82 ms 137472 KB Output is correct
7 Correct 82 ms 137324 KB Output is correct
8 Correct 82 ms 137344 KB Output is correct
9 Correct 82 ms 137452 KB Output is correct
10 Correct 82 ms 137324 KB Output is correct
11 Correct 82 ms 137324 KB Output is correct
12 Correct 85 ms 137344 KB Output is correct
13 Correct 84 ms 137344 KB Output is correct
14 Correct 84 ms 137472 KB Output is correct
15 Correct 85 ms 137452 KB Output is correct
16 Correct 85 ms 137472 KB Output is correct
17 Correct 84 ms 137452 KB Output is correct
18 Correct 83 ms 137324 KB Output is correct
19 Correct 91 ms 137452 KB Output is correct
20 Correct 85 ms 137452 KB Output is correct
21 Correct 84 ms 137328 KB Output is correct
22 Correct 84 ms 137324 KB Output is correct
23 Correct 83 ms 137336 KB Output is correct
24 Correct 83 ms 137324 KB Output is correct
25 Correct 87 ms 137652 KB Output is correct
26 Correct 93 ms 137580 KB Output is correct
27 Correct 87 ms 137580 KB Output is correct
28 Correct 87 ms 137580 KB Output is correct
29 Correct 92 ms 137708 KB Output is correct
30 Correct 86 ms 137708 KB Output is correct
31 Correct 86 ms 137580 KB Output is correct
32 Correct 90 ms 137644 KB Output is correct
33 Correct 88 ms 137580 KB Output is correct
34 Correct 86 ms 137580 KB Output is correct
35 Correct 84 ms 137452 KB Output is correct
36 Correct 86 ms 137452 KB Output is correct
37 Correct 86 ms 137580 KB Output is correct
38 Correct 86 ms 137580 KB Output is correct
39 Correct 86 ms 137580 KB Output is correct
40 Correct 86 ms 137452 KB Output is correct
41 Correct 86 ms 137580 KB Output is correct
42 Correct 88 ms 137580 KB Output is correct
43 Correct 87 ms 137580 KB Output is correct
44 Correct 85 ms 137580 KB Output is correct

Subtask #3
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 137324 KB Output is correct
2 Correct 82 ms 137324 KB Output is correct
3 Correct 82 ms 137324 KB Output is correct
4 Correct 83 ms 137324 KB Output is correct
5 Correct 84 ms 137464 KB Output is correct
6 Correct 82 ms 137472 KB Output is correct
7 Correct 82 ms 137324 KB Output is correct
8 Correct 82 ms 137344 KB Output is correct
9 Correct 82 ms 137452 KB Output is correct
10 Correct 82 ms 137324 KB Output is correct
11 Correct 82 ms 137324 KB Output is correct
12 Correct 85 ms 137344 KB Output is correct
13 Correct 84 ms 137344 KB Output is correct
14 Correct 84 ms 137472 KB Output is correct
15 Correct 85 ms 137452 KB Output is correct
16 Correct 85 ms 137472 KB Output is correct
17 Correct 84 ms 137452 KB Output is correct
18 Correct 83 ms 137324 KB Output is correct
19 Correct 91 ms 137452 KB Output is correct
20 Correct 85 ms 137452 KB Output is correct
21 Correct 84 ms 137328 KB Output is correct
22 Correct 84 ms 137324 KB Output is correct
23 Correct 83 ms 137336 KB Output is correct
24 Correct 83 ms 137324 KB Output is correct
25 Correct 87 ms 137652 KB Output is correct
26 Correct 93 ms 137580 KB Output is correct
27 Correct 87 ms 137580 KB Output is correct
28 Correct 87 ms 137580 KB Output is correct
29 Correct 92 ms 137708 KB Output is correct
30 Correct 86 ms 137708 KB Output is correct
31 Correct 86 ms 137580 KB Output is correct
32 Correct 90 ms 137644 KB Output is correct
33 Correct 88 ms 137580 KB Output is correct
34 Correct 86 ms 137580 KB Output is correct
35 Correct 84 ms 137452 KB Output is correct
36 Correct 86 ms 137452 KB Output is correct
37 Correct 86 ms 137580 KB Output is correct
38 Correct 86 ms 137580 KB Output is correct
39 Correct 86 ms 137580 KB Output is correct
40 Correct 86 ms 137452 KB Output is correct
41 Correct 86 ms 137580 KB Output is correct
42 Correct 88 ms 137580 KB Output is correct
43 Correct 87 ms 137580 KB Output is correct
44 Correct 85 ms 137580 KB Output is correct
45 Correct 283 ms 149516 KB Output is correct
46 Correct 289 ms 149740 KB Output is correct
47 Correct 287 ms 149484 KB Output is correct
48 Correct 290 ms 149996 KB Output is correct
49 Correct 287 ms 149484 KB Output is correct
50 Correct 289 ms 149740 KB Output is correct
51 Correct 283 ms 149868 KB Output is correct
52 Correct 212 ms 145828 KB Output is correct
53 Correct 253 ms 145772 KB Output is correct
54 Correct 279 ms 150108 KB Output is correct
55 Correct 283 ms 149860 KB Output is correct
56 Correct 283 ms 150000 KB Output is correct
57 Correct 262 ms 149356 KB Output is correct
58 Correct 211 ms 145900 KB Output is correct
59 Correct 235 ms 146924 KB Output is correct
60 Correct 267 ms 148460 KB Output is correct
61 Correct 281 ms 149248 KB Output is correct
62 Correct 249 ms 147948 KB Output is correct
63 Correct 265 ms 148588 KB Output is correct
64 Correct 279 ms 149120 KB Output is correct
65 Correct 309 ms 149876 KB Output is correct
66 Correct 318 ms 149864 KB Output is correct
67 Correct 290 ms 149988 KB Output is correct
68 Correct 317 ms 150116 KB Output is correct
69 Correct 292 ms 150368 KB Output is correct
70 Correct 293 ms 150240 KB Output is correct
71 Correct 281 ms 150240 KB Output is correct
72 Correct 288 ms 150368 KB Output is correct
73 Correct 286 ms 150260 KB Output is correct
74 Correct 285 ms 150240 KB Output is correct
75 Correct 266 ms 152428 KB Output is correct
76 Correct 263 ms 151916 KB Output is correct
77 Correct 266 ms 153236 KB Output is correct
78 Correct 283 ms 149740 KB Output is correct
79 Correct 291 ms 149612 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 137324 KB Output is correct
2 Correct 82 ms 137324 KB Output is correct
3 Correct 82 ms 137324 KB Output is correct
4 Correct 83 ms 137324 KB Output is correct
5 Correct 84 ms 137464 KB Output is correct
6 Correct 82 ms 137472 KB Output is correct
7 Correct 82 ms 137324 KB Output is correct
8 Correct 82 ms 137344 KB Output is correct
9 Correct 82 ms 137452 KB Output is correct
10 Correct 82 ms 137324 KB Output is correct
11 Correct 82 ms 137324 KB Output is correct
12 Correct 85 ms 137344 KB Output is correct
13 Correct 84 ms 137344 KB Output is correct
14 Correct 84 ms 137472 KB Output is correct
15 Correct 85 ms 137452 KB Output is correct
16 Correct 85 ms 137472 KB Output is correct
17 Correct 84 ms 137452 KB Output is correct
18 Correct 83 ms 137324 KB Output is correct
19 Correct 91 ms 137452 KB Output is correct
20 Correct 85 ms 137452 KB Output is correct
21 Correct 84 ms 137328 KB Output is correct
22 Correct 84 ms 137324 KB Output is correct
23 Correct 83 ms 137336 KB Output is correct
24 Correct 83 ms 137324 KB Output is correct
25 Correct 87 ms 137652 KB Output is correct
26 Correct 93 ms 137580 KB Output is correct
27 Correct 87 ms 137580 KB Output is correct
28 Correct 87 ms 137580 KB Output is correct
29 Correct 92 ms 137708 KB Output is correct
30 Correct 86 ms 137708 KB Output is correct
31 Correct 86 ms 137580 KB Output is correct
32 Correct 90 ms 137644 KB Output is correct
33 Correct 88 ms 137580 KB Output is correct
34 Correct 86 ms 137580 KB Output is correct
35 Correct 84 ms 137452 KB Output is correct
36 Correct 86 ms 137452 KB Output is correct
37 Correct 86 ms 137580 KB Output is correct
38 Correct 86 ms 137580 KB Output is correct
39 Correct 86 ms 137580 KB Output is correct
40 Correct 86 ms 137452 KB Output is correct
41 Correct 86 ms 137580 KB Output is correct
42 Correct 88 ms 137580 KB Output is correct
43 Correct 87 ms 137580 KB Output is correct
44 Correct 85 ms 137580 KB Output is correct
45 Correct 283 ms 149516 KB Output is correct
46 Correct 289 ms 149740 KB Output is correct
47 Correct 287 ms 149484 KB Output is correct
48 Correct 290 ms 149996 KB Output is correct
49 Correct 287 ms 149484 KB Output is correct
50 Correct 289 ms 149740 KB Output is correct
51 Correct 283 ms 149868 KB Output is correct
52 Correct 212 ms 145828 KB Output is correct
53 Correct 253 ms 145772 KB Output is correct
54 Correct 279 ms 150108 KB Output is correct
55 Correct 283 ms 149860 KB Output is correct
56 Correct 283 ms 150000 KB Output is correct
57 Correct 262 ms 149356 KB Output is correct
58 Correct 211 ms 145900 KB Output is correct
59 Correct 235 ms 146924 KB Output is correct
60 Correct 267 ms 148460 KB Output is correct
61 Correct 281 ms 149248 KB Output is correct
62 Correct 249 ms 147948 KB Output is correct
63 Correct 265 ms 148588 KB Output is correct
64 Correct 279 ms 149120 KB Output is correct
65 Correct 309 ms 149876 KB Output is correct
66 Correct 318 ms 149864 KB Output is correct
67 Correct 290 ms 149988 KB Output is correct
68 Correct 317 ms 150116 KB Output is correct
69 Correct 292 ms 150368 KB Output is correct
70 Correct 293 ms 150240 KB Output is correct
71 Correct 281 ms 150240 KB Output is correct
72 Correct 288 ms 150368 KB Output is correct
73 Correct 286 ms 150260 KB Output is correct
74 Correct 285 ms 150240 KB Output is correct
75 Correct 266 ms 152428 KB Output is correct
76 Correct 263 ms 151916 KB Output is correct
77 Correct 266 ms 153236 KB Output is correct
78 Correct 283 ms 149740 KB Output is correct
79 Correct 291 ms 149612 KB Output is correct
80 Correct 2731 ms 255992 KB Output is correct
81 Correct 2720 ms 255904 KB Output is correct
82 Correct 2706 ms 255496 KB Output is correct
83 Correct 2729 ms 255976 KB Output is correct
84 Correct 2700 ms 256488 KB Output is correct
85 Correct 2692 ms 255492 KB Output is correct
86 Correct 2787 ms 255844 KB Output is correct
87 Correct 1739 ms 220268 KB Output is correct
88 Correct 2324 ms 220308 KB Output is correct
89 Correct 2722 ms 263416 KB Output is correct
90 Correct 2704 ms 261620 KB Output is correct
91 Correct 2681 ms 261452 KB Output is correct
92 Correct 2334 ms 255424 KB Output is correct
93 Correct 1774 ms 220396 KB Output is correct
94 Correct 2220 ms 237196 KB Output is correct
95 Correct 2543 ms 251036 KB Output is correct
96 Correct 2629 ms 254212 KB Output is correct
97 Correct 2256 ms 241672 KB Output is correct
98 Correct 2512 ms 251420 KB Output is correct
99 Correct 2562 ms 254332 KB Output is correct
100 Correct 3311 ms 260160 KB Output is correct
101 Correct 3327 ms 260180 KB Output is correct
102 Correct 2890 ms 262160 KB Output is correct
103 Correct 2898 ms 262240 KB Output is correct
104 Correct 2879 ms 263888 KB Output is correct
105 Correct 2831 ms 263764 KB Output is correct
106 Correct 2904 ms 265496 KB Output is correct
107 Correct 2859 ms 265472 KB Output is correct
108 Correct 2893 ms 264668 KB Output is correct
109 Correct 2823 ms 264924 KB Output is correct
110 Correct 2567 ms 301548 KB Output is correct
111 Correct 2400 ms 298824 KB Output is correct
112 Correct 2395 ms 290668 KB Output is correct
113 Correct 2711 ms 255468 KB Output is correct
114 Correct 2730 ms 255900 KB Output is correct