oj.uz

Submission #402229

# Submission time Handle Problem Language Result Execution time Memory
402229 2021-05-11T12:50:18 Z rrrr10000 From Hacks to Snitches (BOI21_watchmen) C++14
15 / 100
 5899 ms 524288 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);
    ll s=0;
    rep(i,n)s+=dis[i].size();
    assert(s<=400000);
    ll cnt=0;
    while(!que.empty()||!que2.empty()){
        cnt++;
        assert(cnt<=500000);
        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]){
                cnt++;
                bool f=true;
                for(auto y:sp[i])if(x==y)f=false;
                if(!f)continue;
                ll nc=cost+1,p=nc%len[x.fi];
                if(ngv[x.fi]==p){
                    nc++;p++;if(p>=len[x.fi])p-=len[x.fi];
                }
                if(chmin(dis[x.fi][p],nc))que.emplace(x.fi,p);
            }
        }
        for(auto x:sp[i]){
            ll p0=cost%len[x.fi],p1=p0+1;if(p1>=len[x.fi])p1-=len[x.fi];
            cnt++;
            if(nge[x.se]==p0)continue;
            if(ngv[x.fi]==p1)continue;
            if(chmin(dis[x.fi][p1],cost+1))que.emplace(x.fi,p1);
        }
        ll p1=(cost+1)%len[i],p2=p1+1;if(p2>=len[i])p2-=len[i];
        if(ngv[i]==p1){
            if(ok[i]&&chmin(dis[i][p2],cost+2))que.emplace(i,p2);
        }
        else if(chmin(dis[i][p1],cost+1))que2.emplace(i,p1);
    }
    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 50 ms 9352 KB Output is correct
2 Correct 188 ms 24968 KB Output is correct
3 Correct 165 ms 23636 KB Output is correct
4 Correct 159 ms 23796 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 195 ms 23836 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 9440 KB Output is correct
2 Correct 212 ms 24964 KB Output is correct
3 Correct 171 ms 23704 KB Output is correct
4 Correct 175 ms 23876 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 160 ms 23768 KB Output is correct
7 Correct 179 ms 23620 KB Output is correct
8 Correct 171 ms 23596 KB Output is correct
9 Correct 205 ms 23528 KB Output is correct
10 Correct 155 ms 23532 KB Output is correct
11 Correct 158 ms 23492 KB Output is correct
12 Correct 167 ms 23604 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 9440 KB Output is correct
2 Correct 212 ms 24964 KB Output is correct
3 Correct 171 ms 23704 KB Output is correct
4 Correct 175 ms 23876 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 160 ms 23768 KB Output is correct
7 Correct 179 ms 23620 KB Output is correct
8 Correct 171 ms 23596 KB Output is correct
9 Correct 205 ms 23528 KB Output is correct
10 Correct 155 ms 23532 KB Output is correct
11 Correct 158 ms 23492 KB Output is correct
12 Correct 167 ms 23604 KB Output is correct
13 Correct 45 ms 9412 KB Output is correct
14 Correct 182 ms 24860 KB Output is correct
15 Correct 169 ms 23740 KB Output is correct
16 Correct 161 ms 23748 KB Output is correct
17 Correct 2 ms 460 KB Output is correct
18 Correct 153 ms 23760 KB Output is correct
19 Correct 173 ms 23620 KB Output is correct
20 Correct 197 ms 23620 KB Output is correct
21 Correct 186 ms 23620 KB Output is correct
22 Correct 165 ms 23632 KB Output is correct
23 Correct 196 ms 23544 KB Output is correct
24 Correct 195 ms 23712 KB Output is correct
25 Runtime error 5899 ms 524288 KB Execution killed with signal 6
26 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 9440 KB Output is correct
2 Correct 212 ms 24964 KB Output is correct
3 Correct 171 ms 23704 KB Output is correct
4 Correct 175 ms 23876 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 160 ms 23768 KB Output is correct
7 Correct 179 ms 23620 KB Output is correct
8 Correct 171 ms 23596 KB Output is correct
9 Correct 205 ms 23528 KB Output is correct
10 Correct 155 ms 23532 KB Output is correct
11 Correct 158 ms 23492 KB Output is correct
12 Correct 167 ms 23604 KB Output is correct
13 Correct 45 ms 9412 KB Output is correct
14 Correct 182 ms 24860 KB Output is correct
15 Correct 169 ms 23740 KB Output is correct
16 Correct 161 ms 23748 KB Output is correct
17 Correct 2 ms 460 KB Output is correct
18 Correct 153 ms 23760 KB Output is correct
19 Correct 173 ms 23620 KB Output is correct
20 Correct 197 ms 23620 KB Output is correct
21 Correct 186 ms 23620 KB Output is correct
22 Correct 165 ms 23632 KB Output is correct
23 Correct 196 ms 23544 KB Output is correct
24 Correct 195 ms 23712 KB Output is correct
25 Runtime error 5899 ms 524288 KB Execution killed with signal 6
26 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 9352 KB Output is correct
2 Correct 188 ms 24968 KB Output is correct
3 Correct 165 ms 23636 KB Output is correct
4 Correct 159 ms 23796 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 195 ms 23836 KB Output is correct
7 Correct 54 ms 9440 KB Output is correct
8 Correct 212 ms 24964 KB Output is correct
9 Correct 171 ms 23704 KB Output is correct
10 Correct 175 ms 23876 KB Output is correct
11 Correct 2 ms 460 KB Output is correct
12 Correct 160 ms 23768 KB Output is correct
13 Correct 179 ms 23620 KB Output is correct
14 Correct 171 ms 23596 KB Output is correct
15 Correct 205 ms 23528 KB Output is correct
16 Correct 155 ms 23532 KB Output is correct
17 Correct 158 ms 23492 KB Output is correct
18 Correct 167 ms 23604 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 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 50 ms 9352 KB Output is correct
2 Correct 188 ms 24968 KB Output is correct
3 Correct 165 ms 23636 KB Output is correct
4 Correct 159 ms 23796 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 195 ms 23836 KB Output is correct
7 Correct 54 ms 9440 KB Output is correct
8 Correct 212 ms 24964 KB Output is correct
9 Correct 171 ms 23704 KB Output is correct
10 Correct 175 ms 23876 KB Output is correct
11 Correct 2 ms 460 KB Output is correct
12 Correct 160 ms 23768 KB Output is correct
13 Correct 179 ms 23620 KB Output is correct
14 Correct 171 ms 23596 KB Output is correct
15 Correct 205 ms 23528 KB Output is correct
16 Correct 155 ms 23532 KB Output is correct
17 Correct 158 ms 23492 KB Output is correct
18 Correct 167 ms 23604 KB Output is correct
19 Correct 45 ms 9412 KB Output is correct
20 Correct 182 ms 24860 KB Output is correct
21 Correct 169 ms 23740 KB Output is correct
22 Correct 161 ms 23748 KB Output is correct
23 Correct 2 ms 460 KB Output is correct
24 Correct 153 ms 23760 KB Output is correct
25 Correct 173 ms 23620 KB Output is correct
26 Correct 197 ms 23620 KB Output is correct
27 Correct 186 ms 23620 KB Output is correct
28 Correct 165 ms 23632 KB Output is correct
29 Correct 196 ms 23544 KB Output is correct
30 Correct 195 ms 23712 KB Output is correct
31 Runtime error 5899 ms 524288 KB Execution killed with signal 6
32 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 9352 KB Output is correct
2 Correct 188 ms 24968 KB Output is correct
3 Correct 165 ms 23636 KB Output is correct
4 Correct 159 ms 23796 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 195 ms 23836 KB Output is correct
7 Correct 54 ms 9440 KB Output is correct
8 Correct 212 ms 24964 KB Output is correct
9 Correct 171 ms 23704 KB Output is correct
10 Correct 175 ms 23876 KB Output is correct
11 Correct 2 ms 460 KB Output is correct
12 Correct 160 ms 23768 KB Output is correct
13 Correct 179 ms 23620 KB Output is correct
14 Correct 171 ms 23596 KB Output is correct
15 Correct 205 ms 23528 KB Output is correct
16 Correct 155 ms 23532 KB Output is correct
17 Correct 158 ms 23492 KB Output is correct
18 Correct 167 ms 23604 KB Output is correct
19 Correct 45 ms 9412 KB Output is correct
20 Correct 182 ms 24860 KB Output is correct
21 Correct 169 ms 23740 KB Output is correct
22 Correct 161 ms 23748 KB Output is correct
23 Correct 2 ms 460 KB Output is correct
24 Correct 153 ms 23760 KB Output is correct
25 Correct 173 ms 23620 KB Output is correct
26 Correct 197 ms 23620 KB Output is correct
27 Correct 186 ms 23620 KB Output is correct
28 Correct 165 ms 23632 KB Output is correct
29 Correct 196 ms 23544 KB Output is correct
30 Correct 195 ms 23712 KB Output is correct
31 Runtime error 5899 ms 524288 KB Execution killed with signal 6
32 Halted 0 ms 0 KB -