oj.uz

Submission #402215

# Submission time Handle Problem Language Result Execution time Memory
402215 2021-05-11T12:34:10 Z rrrr10000 From Hacks to Snitches (BOI21_watchmen) C++14
15 / 100
 6000 ms 382192 KB 
#include <bits/stdc++.h>
#pragma GCC target("avx")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
using namespace std;
#define rep(i, n)  for(long long i=0;i<(long long)(n);i++)
#define REP(i,k,n) for(long long i=k;i<(long long)(n);i++)
#define pb emplace_back
#define lb(v,k) (lower_bound(all(v),(k))-v.begin())
#define ub(v,k) (upper_bound(all(v),(k))-v.begin())
#define fi first
#define se second
#define pi M_PI
#define PQ(T) priority_queue<T>
#define SPQ(T) priority_queue<T,vector<T>,greater<T>>
#define dame(a) {out(a);return 0;}
#define decimal cout<<fixed<<setprecision(15);
#define all(a) a.begin(),a.end()
#define rsort(a) {sort(all(a));reverse(all(a));}
#define dupli(a) {sort(all(a));a.erase(unique(all(a)),a.end());}
typedef long long ll;
typedef pair<ll,ll> P;
typedef tuple<ll,ll,ll> PP;
typedef tuple<ll,ll,ll,ll> PPP;
using vi=vector<ll>;
using vvi=vector<vi>;
using vvvi=vector<vvi>;
using vvvvi=vector<vvvi>;
using vp=vector<P>;
using vvp=vector<vp>;
using vb=vector<bool>;
using vvb=vector<vb>;
const ll inf=1001001001001001001;
const ll INF=1001001001;
const ll mod=998244353;
const double eps=1e-10;
template<class T> bool chmin(T&a,T b){if(a>b){a=b;return true;}return false;}
template<class T> bool chmax(T&a,T b){if(a<b){a=b;return true;}return false;}
template<class T> void out(T a){cout<<a<<'\n';}
template<class T> void outp(T a){cout<<'('<<a.fi<<','<<a.se<<')'<<'\n';}
template<class T> void outvp(T v){rep(i,v.size())cout<<'('<<v[i].fi<<','<<v[i].se<<')';cout<<'\n';}
template<class T> void outvvp(T v){rep(i,v.size())outvp(v[i]);}
template<class T> void outv(T v){rep(i,v.size()){if(i)cout<<' ';cout<<v[i];}cout<<'\n';}
template<class T> void outvv(T v){rep(i,v.size())outv(v[i]);}
template<class T> bool isin(T x,T l,T r){return (l)<=(x)&&(x)<=(r);}
template<class T> void yesno(T b){if(b)out("yes");else out("no");}
template<class T> void YesNo(T b){if(b)out("Yes");else out("No");}
template<class T> void YESNO(T b){if(b)out("YES");else out("NO");}
template<class T> void outset(T s){auto itr=s.begin();while(itr!=s.end()){if(itr!=s.begin())cout<<' ';cout<<*itr;itr++;}cout<<'\n';}
void outs(ll a,ll b){if(a>=inf-100)out(b);else out(a);}
ll gcd(ll a,ll b){if(b==0)return a;return gcd(b,a%b);}
ll modpow(ll a,ll b){ll res=1;a%=mod;while(b){if(b&1)res=res*a%mod;a=a*a%mod;b>>=1;}return res;}
inline ll readll() {
    ll x = 0;
    int neg=1;
    char ch = getchar_unlocked();
    while (ch < '0' || ch > '9'){
        if(ch=='-')neg=-1;
        ch = getchar_unlocked();
    }
    while (ch >= '0' && ch <= '9'){
		x = (x << 3) + (x << 1) + ch - '0';
		ch = getchar_unlocked();
	}
    return x*neg;
}
int main(){
    ll n=readll(),m=readll();
    map<P,ll> edges;
    vvp g(n);
    rep(i,m){
        ll a=readll()-1,b=readll()-1;
        g[a].pb(b,i);g[b].pb(a,i);
        edges[P(min(a,b),max(a,b))]=i;
    }
    ll k=readll();
    vi len(n,1),ngv(n,-1),nge(m,-1);
    vvp sp(n);
    rep(j,k){
        ll l=readll();
        vi v(l);
        rep(i,l)v[i]=readll()-1;
        rep(i,l){
            ngv[v[i]]=i;len[v[i]]=l;
            ll id=edges[P(min(v[i],v[(i+1)%l]),max(v[i],v[(i+1)%l]))];
            nge[id]=i;
            sp[v[i]].pb(v[(i+1)%l],id);
            sp[v[(i+1)%l]].pb(v[i],id);
        }
    }
    vb ok(n,false);
    rep(i,n)for(auto x:g[i])if(ngv[x.fi]==-1)ok[i]=true;
    vvi dis(n);
    rep(i,n)dis[i]=vi(len[i],inf);
    dis[0][0]=0;
    vi dis2(n,inf);
    queue<P> que,que2;
    que.emplace(0,0);
    while(!que.empty()||!que2.empty()){
        while(que2.size()&&(que.empty()||que2.front().fi==que.front().fi)){
            que.push(que2.front());que2.pop();
        }
        ll i=que.front().fi,j=que.front().se,cost=dis[i][j];que.pop();
        if(chmin(dis2[i],cost)){
            for(auto x:g[i]){
                bool f=true;
                for(auto y:sp[i])if(x==y)f=false;
                if(!f)continue;
                ll nc=cost+1;
                if(ngv[x.fi]==nc%len[x.fi])nc++;
                if(chmin(dis[x.fi][nc%len[x.fi]],nc))que.emplace(x.fi,nc%len[x.fi]);
            }
        }
        for(auto x:sp[i]){
            if(nge[x.se]==cost%len[x.fi])continue;
            ll nc=cost+1;
            if(ngv[x.fi]==nc%len[x.fi])continue;
            if(chmin(dis[x.fi][nc%len[x.fi]],nc))que.emplace(x.fi,nc%len[x.fi]);
        }
        if(ngv[i]==(cost+1)%len[i]){
            if(ok[i]&&chmin(dis[i][(cost+2)%len[i]],cost+2))que.emplace(i,(cost+2)%len[i]);
        }
        else if(chmin(dis[i][(cost+1)%len[i]],cost+1))que2.emplace(i,(cost+1)%len[i]);
    }
    ll ans=inf;
    for(ll x:dis[n-1])chmin(ans,x);
    if(ans==inf)out("impossible");
    else out(ans);
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 9708 KB Output is correct
2 Correct 183 ms 25168 KB Output is correct
3 Correct 172 ms 24004 KB Output is correct
4 Correct 169 ms 24072 KB Output is correct
5 Correct 2 ms 416 KB Output is correct
6 Correct 175 ms 24048 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 9584 KB Output is correct
2 Correct 200 ms 25256 KB Output is correct
3 Correct 149 ms 23988 KB Output is correct
4 Correct 150 ms 24076 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 174 ms 24120 KB Output is correct
7 Correct 184 ms 23816 KB Output is correct
8 Correct 160 ms 23772 KB Output is correct
9 Correct 182 ms 23880 KB Output is correct
10 Correct 179 ms 23776 KB Output is correct
11 Correct 163 ms 23804 KB Output is correct
12 Correct 176 ms 23860 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 9584 KB Output is correct
2 Correct 200 ms 25256 KB Output is correct
3 Correct 149 ms 23988 KB Output is correct
4 Correct 150 ms 24076 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 174 ms 24120 KB Output is correct
7 Correct 184 ms 23816 KB Output is correct
8 Correct 160 ms 23772 KB Output is correct
9 Correct 182 ms 23880 KB Output is correct
10 Correct 179 ms 23776 KB Output is correct
11 Correct 163 ms 23804 KB Output is correct
12 Correct 176 ms 23860 KB Output is correct
13 Correct 64 ms 9668 KB Output is correct
14 Correct 215 ms 25128 KB Output is correct
15 Correct 155 ms 23916 KB Output is correct
16 Correct 162 ms 24004 KB Output is correct
17 Correct 2 ms 412 KB Output is correct
18 Correct 168 ms 24132 KB Output is correct
19 Correct 173 ms 23808 KB Output is correct
20 Correct 162 ms 23808 KB Output is correct
21 Correct 206 ms 23832 KB Output is correct
22 Correct 152 ms 23876 KB Output is correct
23 Correct 163 ms 23828 KB Output is correct
24 Correct 204 ms 23884 KB Output is correct
25 Execution timed out 6085 ms 382192 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 9584 KB Output is correct
2 Correct 200 ms 25256 KB Output is correct
3 Correct 149 ms 23988 KB Output is correct
4 Correct 150 ms 24076 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 174 ms 24120 KB Output is correct
7 Correct 184 ms 23816 KB Output is correct
8 Correct 160 ms 23772 KB Output is correct
9 Correct 182 ms 23880 KB Output is correct
10 Correct 179 ms 23776 KB Output is correct
11 Correct 163 ms 23804 KB Output is correct
12 Correct 176 ms 23860 KB Output is correct
13 Correct 64 ms 9668 KB Output is correct
14 Correct 215 ms 25128 KB Output is correct
15 Correct 155 ms 23916 KB Output is correct
16 Correct 162 ms 24004 KB Output is correct
17 Correct 2 ms 412 KB Output is correct
18 Correct 168 ms 24132 KB Output is correct
19 Correct 173 ms 23808 KB Output is correct
20 Correct 162 ms 23808 KB Output is correct
21 Correct 206 ms 23832 KB Output is correct
22 Correct 152 ms 23876 KB Output is correct
23 Correct 163 ms 23828 KB Output is correct
24 Correct 204 ms 23884 KB Output is correct
25 Execution timed out 6085 ms 382192 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 9708 KB Output is correct
2 Correct 183 ms 25168 KB Output is correct
3 Correct 172 ms 24004 KB Output is correct
4 Correct 169 ms 24072 KB Output is correct
5 Correct 2 ms 416 KB Output is correct
6 Correct 175 ms 24048 KB Output is correct
7 Correct 50 ms 9584 KB Output is correct
8 Correct 200 ms 25256 KB Output is correct
9 Correct 149 ms 23988 KB Output is correct
10 Correct 150 ms 24076 KB Output is correct
11 Correct 2 ms 460 KB Output is correct
12 Correct 174 ms 24120 KB Output is correct
13 Correct 184 ms 23816 KB Output is correct
14 Correct 160 ms 23772 KB Output is correct
15 Correct 182 ms 23880 KB Output is correct
16 Correct 179 ms 23776 KB Output is correct
17 Correct 163 ms 23804 KB Output is correct
18 Correct 176 ms 23860 KB Output is correct
19 Correct 1 ms 272 KB Output is correct
20 Correct 1 ms 288 KB Output is correct
21 Incorrect 1 ms 204 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 9708 KB Output is correct
2 Correct 183 ms 25168 KB Output is correct
3 Correct 172 ms 24004 KB Output is correct
4 Correct 169 ms 24072 KB Output is correct
5 Correct 2 ms 416 KB Output is correct
6 Correct 175 ms 24048 KB Output is correct
7 Correct 50 ms 9584 KB Output is correct
8 Correct 200 ms 25256 KB Output is correct
9 Correct 149 ms 23988 KB Output is correct
10 Correct 150 ms 24076 KB Output is correct
11 Correct 2 ms 460 KB Output is correct
12 Correct 174 ms 24120 KB Output is correct
13 Correct 184 ms 23816 KB Output is correct
14 Correct 160 ms 23772 KB Output is correct
15 Correct 182 ms 23880 KB Output is correct
16 Correct 179 ms 23776 KB Output is correct
17 Correct 163 ms 23804 KB Output is correct
18 Correct 176 ms 23860 KB Output is correct
19 Correct 64 ms 9668 KB Output is correct
20 Correct 215 ms 25128 KB Output is correct
21 Correct 155 ms 23916 KB Output is correct
22 Correct 162 ms 24004 KB Output is correct
23 Correct 2 ms 412 KB Output is correct
24 Correct 168 ms 24132 KB Output is correct
25 Correct 173 ms 23808 KB Output is correct
26 Correct 162 ms 23808 KB Output is correct
27 Correct 206 ms 23832 KB Output is correct
28 Correct 152 ms 23876 KB Output is correct
29 Correct 163 ms 23828 KB Output is correct
30 Correct 204 ms 23884 KB Output is correct
31 Execution timed out 6085 ms 382192 KB Time limit exceeded
32 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 9708 KB Output is correct
2 Correct 183 ms 25168 KB Output is correct
3 Correct 172 ms 24004 KB Output is correct
4 Correct 169 ms 24072 KB Output is correct
5 Correct 2 ms 416 KB Output is correct
6 Correct 175 ms 24048 KB Output is correct
7 Correct 50 ms 9584 KB Output is correct
8 Correct 200 ms 25256 KB Output is correct
9 Correct 149 ms 23988 KB Output is correct
10 Correct 150 ms 24076 KB Output is correct
11 Correct 2 ms 460 KB Output is correct
12 Correct 174 ms 24120 KB Output is correct
13 Correct 184 ms 23816 KB Output is correct
14 Correct 160 ms 23772 KB Output is correct
15 Correct 182 ms 23880 KB Output is correct
16 Correct 179 ms 23776 KB Output is correct
17 Correct 163 ms 23804 KB Output is correct
18 Correct 176 ms 23860 KB Output is correct
19 Correct 64 ms 9668 KB Output is correct
20 Correct 215 ms 25128 KB Output is correct
21 Correct 155 ms 23916 KB Output is correct
22 Correct 162 ms 24004 KB Output is correct
23 Correct 2 ms 412 KB Output is correct
24 Correct 168 ms 24132 KB Output is correct
25 Correct 173 ms 23808 KB Output is correct
26 Correct 162 ms 23808 KB Output is correct
27 Correct 206 ms 23832 KB Output is correct
28 Correct 152 ms 23876 KB Output is correct
29 Correct 163 ms 23828 KB Output is correct
30 Correct 204 ms 23884 KB Output is correct
31 Execution timed out 6085 ms 382192 KB Time limit exceeded
32 Halted 0 ms 0 KB -