Submission #645534

#	Time	Username	Problem	Language	Result	Execution time	Memory
645534		TimDee	Speedrun (RMI21_speedrun)	C++17	48 / 100	441 ms	8768 KiB

speedrun

#include "speedrun.h"
#include <bits/stdc++.h>
using namespace std;

vector<int> p(1e3+1);
vector<int> r(1e3+1,0);

int get(int a) {
    return (a==p[a])?a:get(a);
}

void uni(int a, int b) {
    a=get(a), b=get(b);
    if (a==b) return;
    if (r[a]==r[b]) ++r[a];
    if (r[a]<r[b]) swap(a,b);
    p[b]=a;
}

void assignHints(int id,int n, int a[], int b[]) {
    if (id==1) {
        setHintLen(n);
        for(int i=1;i<=n-1;++i) {
            int u=a[i],v=b[i];
            setHint(u,v,1);
            setHint(v,u,1);
        }
    }
    if (id==2) {
        setHintLen(20);
        vector<int>deg(n+1,0);
        for(int i=0;i<n-1;++i) deg[a[i]]++;
        for(int i=0;i<n-1;++i) deg[b[i]]++;
        int mx=0;
        for(int i=1;i<=n;++i) if (deg[i]>deg[mx]) mx=i;
        for (int i=1; i<=n; ++i) {
            if (i==mx) setHint(i,20,1);
            for (int j=11; j>0; --j) {
                setHint(i,j,!!(mx&(1<<(j-1))));
            }
        }
    }
    if (id==3) {
        setHintLen(20);
        vector<pair<int,int>> adj(n+1,{0,0});
        for (int i=1; i<n; ++i) {
            if (adj[a[i]].first) adj[a[i]].second=b[i];
            else adj[a[i]].first=b[i];
            if (adj[b[i]].first) adj[b[i]].second=a[i];
            else adj[b[i]].first=a[i];
        }
        for (int i=1; i<=n; ++i) {
            for (int j=10; j; --j) {
                setHint(i,j,!!(adj[i].first&(1<<(j-1))));
            }
            for (int j=10; j; --j) {
                setHint(i,j+10,!!(adj[i].second&(1<<(j-1))));
            }
        }
    }
    if (id==4) {
        setHintLen(316);
        vector<vector<int>> adj(n+1);
        for (int i=1; i<n; ++i) {
            adj[a[i]].push_back(b[i]);
            adj[b[i]].push_back(a[i]);
        }
        vector<pair<int,int>> toadd;
        for (int i=1; i<=n; ++i) {
            int s=adj[i].size();
            for (int j=10; j; --j) setHint(i,j,!!(s&(1<<(j-1))));
            int pt=10;
            for (auto x:adj[i]) {
                if (pt<306) {
                    for (int j=10; j; --j) setHint(i,j+pt,!!(x&(1<<(j-1))));
                    pt+=10;
                } else {
                    toadd.push_back({i,x});
                }
            }
            for (; pt<296; pt+=20) {
                if (toadd.empty()) break;
                auto p=toadd.back(); toadd.pop_back();
                for (int j=10; j; --j) {
                    setHint(i,j+pt,!!(p.first&(1<<(j-1))));
                    setHint(i,j+pt+10,!!(p.second&(1<<(j-1))));
                }
            }
        }
    }
}

int n;
vector<vector<int>> adj(1e3+1,vector<int>(1e3+1,0));
vector<int> vis(1e3+1,0);

void dfs(int u, int p) {
    for (int j=1; j<=n; ++j) {
        adj[u][j]=getHint(j);
    }
    for (int i=1; i<=n; ++i) {
        if (i==p) continue;
        if (adj[u][i]) {
            goTo(i);
            dfs(i,u);
        }
    }
    if (p==-1) return;
    goTo(p);
}

void dfs2(int u, int p) {
    int l=0, r=0;
    for (int j=10; j>0; --j) {
        l+=getHint(j)<<(j-1);
        r+=getHint(j+10)<<(j-1);
    }
    adj[u][l]=1, adj[u][r]=1;
    for (int i=1; i<=n; ++i) {
        if (i==p) continue;
        if (adj[u][i]) {
            goTo(i);
            dfs2(i,u);
        }
    }
    if (p==-1) return;
    goTo(p);
}

void scuza(int u, int p) {
    vis[u]=1;
    int sz=0;
    for (int j=10; j>0; --j) {
        sz+=getHint(j)<<(j-1);
    }
    int pt=10;
    for (;pt<=min(sz*10,306);pt+=10) {
        int x=0;
        for (int j=10; j; --j) x+=getHint(j+pt)<<(j-1);
        adj[u][x]=1;
        adj[x][u]=1;
    }
    for (int j=1; j<=n; ++j) {
        if (j==p) continue;
        if (vis[j]) continue;
        if (adj[u][j]) {
            goTo(j);
            scuza(j,u);
        }
    }
    if (p==-1) return;
    if (sz<=30) {
        goTo(p);
        return;
    }
    for (int j=1; j<=n; ++j) {
        if (j==p) continue;
        if (vis[j]) continue;
        if (adj[u][j]) {
            goTo(j);
            scuza(j,u);
        }
    }
    for (int j=1; j<=n; ++j) {
        if (j==p) continue;
        if (vis[j]) continue;
        int x=goTo(j);
        if (x) scuza(j,u);
    }

}

int center=0;

void speedrun(int id,int N,int start) {
    for (int i=1; i<=1e3; ++i) p[i]=i;
    n=N;
    if (id==1) {
        dfs(start,-1);
    }
    if (id==2) {
        for (int j=11; j>0; --j) {
            center+=getHint(j)<<(j-1);
        }
        bool b=getHint(20);
        if (!b) {
            goTo(center);
        }
        for (int i=1; i<=n; ++i) {
            if (i==center) continue;
            goTo(i);
            goTo(center);
        }
    }
    if (id==3) {
        dfs2(start,-1);
    }
    if (id==4) {
        scuza(start,-1);
    }
}

• Subtask 1: 21 / 21
• Subtask 2: 8 / 8
• Subtask 3: 19 / 19
• Subtask 4: 0 / 12
• Subtask 5: 0 / 40