oj.uz

Submission #402233

# Submission time Handle Problem Language Result Execution time Memory
402233 2021-05-11T12:52:56 Z rrrr10000 From Hacks to Snitches (BOI21_watchmen) C++14
15 / 100
 5820 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;
            if(i==l-1&&l==2)break;
            sp[v[i]].pb(v[(i+1)%l],id);
            sp[v[(i+1)%l]].pb(v[i],id);
        }
    }
    rep(i,n)assert(sp[i].size()<=2);
    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 45 ms 9368 KB Output is correct
2 Correct 210 ms 24908 KB Output is correct
3 Correct 198 ms 23644 KB Output is correct
4 Correct 154 ms 23784 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 163 ms 23884 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 9392 KB Output is correct
2 Correct 214 ms 24964 KB Output is correct
3 Correct 175 ms 23688 KB Output is correct
4 Correct 183 ms 23780 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 173 ms 23852 KB Output is correct
7 Correct 166 ms 23572 KB Output is correct
8 Correct 168 ms 23516 KB Output is correct
9 Correct 222 ms 23492 KB Output is correct
10 Correct 156 ms 23588 KB Output is correct
11 Correct 165 ms 23492 KB Output is correct
12 Correct 157 ms 23704 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 9392 KB Output is correct
2 Correct 214 ms 24964 KB Output is correct
3 Correct 175 ms 23688 KB Output is correct
4 Correct 183 ms 23780 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 173 ms 23852 KB Output is correct
7 Correct 166 ms 23572 KB Output is correct
8 Correct 168 ms 23516 KB Output is correct
9 Correct 222 ms 23492 KB Output is correct
10 Correct 156 ms 23588 KB Output is correct
11 Correct 165 ms 23492 KB Output is correct
12 Correct 157 ms 23704 KB Output is correct
13 Correct 44 ms 9420 KB Output is correct
14 Correct 206 ms 24992 KB Output is correct
15 Correct 157 ms 23716 KB Output is correct
16 Correct 162 ms 23744 KB Output is correct
17 Correct 2 ms 460 KB Output is correct
18 Correct 159 ms 23808 KB Output is correct
19 Correct 172 ms 23668 KB Output is correct
20 Correct 177 ms 23752 KB Output is correct
21 Correct 203 ms 23492 KB Output is correct
22 Correct 203 ms 23556 KB Output is correct
23 Correct 155 ms 23536 KB Output is correct
24 Correct 166 ms 23616 KB Output is correct
25 Runtime error 5820 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 46 ms 9392 KB Output is correct
2 Correct 214 ms 24964 KB Output is correct
3 Correct 175 ms 23688 KB Output is correct
4 Correct 183 ms 23780 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 173 ms 23852 KB Output is correct
7 Correct 166 ms 23572 KB Output is correct
8 Correct 168 ms 23516 KB Output is correct
9 Correct 222 ms 23492 KB Output is correct
10 Correct 156 ms 23588 KB Output is correct
11 Correct 165 ms 23492 KB Output is correct
12 Correct 157 ms 23704 KB Output is correct
13 Correct 44 ms 9420 KB Output is correct
14 Correct 206 ms 24992 KB Output is correct
15 Correct 157 ms 23716 KB Output is correct
16 Correct 162 ms 23744 KB Output is correct
17 Correct 2 ms 460 KB Output is correct
18 Correct 159 ms 23808 KB Output is correct
19 Correct 172 ms 23668 KB Output is correct
20 Correct 177 ms 23752 KB Output is correct
21 Correct 203 ms 23492 KB Output is correct
22 Correct 203 ms 23556 KB Output is correct
23 Correct 155 ms 23536 KB Output is correct
24 Correct 166 ms 23616 KB Output is correct
25 Runtime error 5820 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 45 ms 9368 KB Output is correct
2 Correct 210 ms 24908 KB Output is correct
3 Correct 198 ms 23644 KB Output is correct
4 Correct 154 ms 23784 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 163 ms 23884 KB Output is correct
7 Correct 46 ms 9392 KB Output is correct
8 Correct 214 ms 24964 KB Output is correct
9 Correct 175 ms 23688 KB Output is correct
10 Correct 183 ms 23780 KB Output is correct
11 Correct 2 ms 460 KB Output is correct
12 Correct 173 ms 23852 KB Output is correct
13 Correct 166 ms 23572 KB Output is correct
14 Correct 168 ms 23516 KB Output is correct
15 Correct 222 ms 23492 KB Output is correct
16 Correct 156 ms 23588 KB Output is correct
17 Correct 165 ms 23492 KB Output is correct
18 Correct 157 ms 23704 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 45 ms 9368 KB Output is correct
2 Correct 210 ms 24908 KB Output is correct
3 Correct 198 ms 23644 KB Output is correct
4 Correct 154 ms 23784 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 163 ms 23884 KB Output is correct
7 Correct 46 ms 9392 KB Output is correct
8 Correct 214 ms 24964 KB Output is correct
9 Correct 175 ms 23688 KB Output is correct
10 Correct 183 ms 23780 KB Output is correct
11 Correct 2 ms 460 KB Output is correct
12 Correct 173 ms 23852 KB Output is correct
13 Correct 166 ms 23572 KB Output is correct
14 Correct 168 ms 23516 KB Output is correct
15 Correct 222 ms 23492 KB Output is correct
16 Correct 156 ms 23588 KB Output is correct
17 Correct 165 ms 23492 KB Output is correct
18 Correct 157 ms 23704 KB Output is correct
19 Correct 44 ms 9420 KB Output is correct
20 Correct 206 ms 24992 KB Output is correct
21 Correct 157 ms 23716 KB Output is correct
22 Correct 162 ms 23744 KB Output is correct
23 Correct 2 ms 460 KB Output is correct
24 Correct 159 ms 23808 KB Output is correct
25 Correct 172 ms 23668 KB Output is correct
26 Correct 177 ms 23752 KB Output is correct
27 Correct 203 ms 23492 KB Output is correct
28 Correct 203 ms 23556 KB Output is correct
29 Correct 155 ms 23536 KB Output is correct
30 Correct 166 ms 23616 KB Output is correct
31 Runtime error 5820 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 45 ms 9368 KB Output is correct
2 Correct 210 ms 24908 KB Output is correct
3 Correct 198 ms 23644 KB Output is correct
4 Correct 154 ms 23784 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 163 ms 23884 KB Output is correct
7 Correct 46 ms 9392 KB Output is correct
8 Correct 214 ms 24964 KB Output is correct
9 Correct 175 ms 23688 KB Output is correct
10 Correct 183 ms 23780 KB Output is correct
11 Correct 2 ms 460 KB Output is correct
12 Correct 173 ms 23852 KB Output is correct
13 Correct 166 ms 23572 KB Output is correct
14 Correct 168 ms 23516 KB Output is correct
15 Correct 222 ms 23492 KB Output is correct
16 Correct 156 ms 23588 KB Output is correct
17 Correct 165 ms 23492 KB Output is correct
18 Correct 157 ms 23704 KB Output is correct
19 Correct 44 ms 9420 KB Output is correct
20 Correct 206 ms 24992 KB Output is correct
21 Correct 157 ms 23716 KB Output is correct
22 Correct 162 ms 23744 KB Output is correct
23 Correct 2 ms 460 KB Output is correct
24 Correct 159 ms 23808 KB Output is correct
25 Correct 172 ms 23668 KB Output is correct
26 Correct 177 ms 23752 KB Output is correct
27 Correct 203 ms 23492 KB Output is correct
28 Correct 203 ms 23556 KB Output is correct
29 Correct 155 ms 23536 KB Output is correct
30 Correct 166 ms 23616 KB Output is correct
31 Runtime error 5820 ms 524288 KB Execution killed with signal 6
32 Halted 0 ms 0 KB -