Submission #1120918

#	Time	Username	Problem	Language	Result	Execution time	Memory
1120918		vjudge1	KOVANICE (COI15_kovanice)	C++17	10 / 100	50 ms	41812 KiB

kovanice

#include <bits/stdc++.h>
#define ll long long
#define endl "\n";
#define AI ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
vector<queue<ll>>ve(30001);
ll a[30001];
void upd(ll x)
{
    while(!(ve[x].empty()))
    {
        ll z=ve[x].front();
        ve[x].pop();
        if(a[z]==-1)
        {
            a[z]=a[x];
            upd(z);
        }
    }
}
int main()
{
    ll n,m,v,i,j;
    cin>>n>>m>>v;
    for(i=0;i<m;i++)
    a[i]=-1;
    ll x,y;
    char d;
    queue<ll>qq;
    for(i=0;i<v;i++)
    {
        cin>>x>>d>>y;
        x--;
        y--;
        if(d=='<')
        {
            a[x]=1;
            a[y]=2;
            upd(x);
            upd(y);
        }
        else
        {
            if(a[x]!=-1)
            a[y]=a[x];
            else if(a[y]!=-1)
            a[x]=a[y];
            else
            {
                ve[x].push(y);
                ve[y].push(x);
            }
        }
    }
    for(i=0;i<m;i++)
    upd(i);
    for(i=0;i<m;i++)
    {
        if(a[i]==-1)
        cout<<"?\n";
        else
        cout<<"K"<<a[i]<<endl;
    }
}

Compilation message (stderr)

kovanice.cpp: In function 'int main()':
kovanice.cpp:23:16: warning: unused variable 'j' [-Wunused-variable]
   23 |     ll n,m,v,i,j;
      |                ^

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