#include <bits/stdc++.h>
using namespace std;
ifstream f("radiatie.in");
ofstream g("radiatie.out");
int n,m,k,i,x,y,L[1<<14],C[1<<14],T[1<<14],GR[1<<14];
bool viz[1<<14];
vector <pair <int,int> > G[1<<14];
struct pt
{
    int x,y,c;
}v[1<<15];
bool cmp(pt a,pt b)
{
    return a.c<b.c;
}
void dfs(int x)
{
    viz[x]=1;
    for(int i=0;i<G[x].size();++i)
        if(!viz[G[x][i].first])
    {
        L[G[x][i].first]=L[x]+1;
        C[G[x][i].first]=G[x][i].second;
        T[G[x][i].first]=x;
        dfs(G[x][i].first);
    }
}
int gr(int i)
{
    if(GR[i]!=i) GR[i]=gr(GR[i]);
    return GR[i];
}
int main()
{
    f>>n>>m>>k;
    for(i=1;i<=m;++i) f>>v[i].x>>v[i].y>>v[i].c;
    sort(v+1,v+m+1,cmp);
    for(i=1;i<=n;++i) GR[i]=i;
    for(i=1;i<=m;++i)
        if(gr(v[i].x)!=gr(v[i].y))
    {
        G[v[i].x].push_back(make_pair(v[i].y,v[i].c));
        G[v[i].y].push_back(make_pair(v[i].x,v[i].c));
        GR[gr(v[i].x)]=GR[v[i].y];
    }
    dfs(1);
    while(k--)
    {
        f>>x>>y;
        int cost=0;
        while(T[x]!=T[y])
            if(L[x]<L[y]) cost=max(cost,C[y]),y=T[y];
            else cost=max(cost,C[x]),x=T[x];
        while(x!=y)
            if(L[x]<L[y]) cost=max(cost,C[y]),y=T[y];
            else cost=max(cost,C[x]),x=T[x];
        g<<cost<<'\n';
    }
    return 0;
}