Monday, 10 July 2017

Army Buddies (UVa 12356, UVaLive 5789, Regionals 2011 >> Latin America) 

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///     Raihan Ruhin
///     CSE, Jahangirnagar University.
///     Dhaka-Bangladesh.
///     id: raihanruhin (topcoder / codeforces / codechef / uva ), 3235 (lightoj)
///     mail: raihanruhin@ (yahoo / gmail / facebook)
///     blog: ruhinraihan.blogspot.com

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

#define SET(a) memset(a,-1,sizeof(a))
#define CLR(a) memset(a,0,sizeof(a))
#define PI acos(-1.0)

#define MOD 1000000007
#define MX 100010

int l[MX], r[MX];
int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    int tc,kk=1, n, q, lf, rg;

    while(cin>>n>>q)
    {
        if(!n && !q) return 0;
        for(int i=1;i<=n;i++)
            l[i]=i-1, r[i]=i+1;
        r[n]=0;
        while(q--)
        {
            cin>>lf>>rg;
            l[r[rg]] = l[lf];
            r[l[lf]] = r[rg];
            if(l[lf]) cout<<l[lf]<<" ";
            else cout<<"* ";
            if(r[rg]) cout<<r[rg]<<"\n";
            else cout<<"*\n";
        }
        cout<<"-\n";
    }
    return 0;
}
at

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