Submission #846137

#	Time	Username	Problem	Language	Result	Execution time	Memory
846137		vjudge1	KOVANICE (COI15_kovanice)	C++17	0 / 100	363 ms	39944 KiB

kovanice

#pragma GCC optimize("unroll-loops,Ofast,O3")
#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define spc << " " <<
#define all(x) x.begin(), x.end()
#define ll long long
#define int long long
#define ii pair<int,int>
#define vi vector<int>
#define vii vector<ii>
#define st first
#define nd second
#define inf 1000000009
#define MOD 998244353
using namespace std;



int dad[300005];
string ans[300005];
int dep[300005];
vi edges[300005];

int find(int x){
    if(dad[x]==x) return x;
    return dad[x]=find(dad[x]);
}
void unite(int x, int y){
    dad[find(x)]=find(y);
}


void dfs(int node){
    if(dep[node]!=-1) return;
    dep[node]=1;

    for(auto i:edges[node]){
        dfs(i);
        dep[node]=max(dep[node], dep[i]+1);
    }
}


void mark(int node){
    if(ans[node]!="?") return;

    ans[node] = "K";
    ans[node] += to_string(dep[node]);

    for(auto i:edges[node]){
        if(dep[i]==dep[node]-1){
            mark(i);
        }
    }
}





void solve(){
    int n, m, v; cin >> n >> m >> v;

    for(int i=1; i<=m; i++){
        dad[i]=i;
        ans[i]="?";
        dep[i]=-1;
    }

    vector<string> later;
    for(int i=1; i<=v; i++){
        string s; cin >> s;
        int a=s[0]-'0', b=s[2]-'0';
        if(s[1]=='='){
            unite(a,b);
        }
        else later.pb(s);
    }
    for(auto s:later){
        int a=s[0]-'0', b=s[2]-'0';
        if(s[1]=='<'){
            edges[find(b)].pb(find(a));
        }
        else edges[find(a)].pb(find(b));
    }
    
    for(int i=1; i<=m; i++){
        dfs(find(i));
    }

    for(int i=1; i<=m; i++){
        if(dep[find(i)]==n) mark(find(i));
    }

    for(int i=1; i<=m; i++){
        cout << ans[find(i)] << endl;
    }
}



signed main(){
    ios_base::sync_with_stdio(false);cin.tie(0);
    #ifdef Local
    freopen("in.txt","r",stdin);
    freopen("out","w",stdout);
    #endif
    

    ll t=1;
    //cin >> t;
    while(t--) solve();
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 10
• Subtask 4: 0 / 40