//nani?
#include<bits/stdc++.h>
#define pi acos(-1);
#define fs first
#define sc second
#define pb push_back
#define mp make_pair
#define f(i,a,b) for( int i = a; i < b ; i++ )
#define sor(a) sort( a.begin(), a.end() )
#define rsor(a) sort( a.rbegin(), a.rend() )
#define fastio ios_base::sync_with_stdio(0);cin.tie(0)
//#define inf 1LL<<62
typedef long long ll;
typedef double ld;
using namespace std;
const ll inf=1e10+6;
const ll MOD=1e9+7;
const ll mod=998244353;
// ac cmtr;
const int MAX_N = 2*1e6+5;
const int LG = 25;
 
#define TRACE
#ifdef TRACE
#define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)
template <typename Arg1>
void __f(const char* name, Arg1&& arg1) {
  cout << name << " : " << arg1 << endl;}
 
template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&&... args) {
  const char* comma = strchr(names + 1, ',');
  cout.write(names, comma - names) << " : " << arg1<<" | ";
  __f(comma+1, args...);}
#else
#define trace(...)
#endif
//---------------------------
unordered_map <ll,ll> cx;
unordered_map <ll,ll> cy;
unordered_map <ll,ll> xc;
unordered_map <ll,ll> yc;
    
int movx[4] = {-1,0,1,0};
int movy[4] = {0,1,0,-1};
ll val[3005][3005];
bool ri[3005][3005];
bool iz[3005][3005];
bool vis[3005][3005];
ll disl[3005],disr[3005];
ll ans = 0;
ll cnt = 1,cnt1 = 1;
 
int bfs(int a,int b){
    queue<pair <int,int> > pq;
    //if(!vis[a+1][b+1]) ans+=val[a+1][b+1];
    vis[a][b] = 1;
    pq.push({a,b});//pq.push({a+1,b+1});
    while(!pq.empty()){
        pair <int,int> aux  = pq.front();
        pq.pop();
      	//trace(aux.fs,aux.sc);
        if((aux.fs >= (cnt-1)) || (aux.sc >=( cnt1-1)) || (aux.fs <= 0) || (aux.sc <= 0)) {cout<<"INF"<<endl;exit(0);}
        ans += disl[aux.fs]*disr[aux.sc];
        //vis[aux.fs][aux.sc] = 1;
        /*for(int i = 0 ; i < 4;i++){
            int x,y;
            x = aux.fs + movx[i];
            y = aux.sc + movy[i] ;
            //trace(x,y);
            if(x == 3004 || y ==3004 || x == -1 || y == -1) {return 0;}
            if(!vis[x][y]) {pq.push({x,y});}
        }*/
        if(ri[aux.sc][aux.fs] && !vis[aux.fs][aux.sc-1]) {vis[aux.fs][aux.sc-1] = 1;pq.push({aux.fs,aux.sc-1});}
        if(ri[aux.sc+1][aux.fs] && !vis[aux.fs][aux.sc+1]) {vis[aux.fs][aux.sc+1] = 1;pq.push({aux.fs,aux.sc+1});}
        if(iz[aux.fs][aux.sc] && !vis[aux.fs-1][aux.sc]) {vis[aux.fs-1][aux.sc] = 1;pq.push({aux.fs-1,aux.sc});}
        if(iz[aux.fs+1][aux.sc] && !vis[aux.fs+1][aux.sc]) {vis[aux.fs+1][aux.sc] = 1;pq.push({aux.fs+1,aux.sc});} 
    }
    return 1;
 
}
 
int main(){
    fastio;
    int n,m;
    cin>>n>>m;
    ll a,b,c;
    set <ll> sx;
    set <ll> sy; 
    vector <pair <pair <ll,ll> , ll > > vx;
    vector <pair <pair <ll,ll> , ll > > vy;
    f(i,0,n){
        cin>>a>>b>>c;
       // scanf("%lld%lld%lld",&a,&b,&c);
        sy.insert(c);
        sx.insert(a);sx.insert(b);
        vx.pb({{a,b},c});
    }
    f(i,0,m){
        cin>>a>>b>>c;
        //scanf("%d%d%d",&a,&b,&c);
        sx.insert(a);
        sy.insert(b);sy.insert(c);
        vy.pb({{b,c},a});
    }
    sx.insert(0);sy.insert(0);
    //for(auto xd : sy) trace(xd);
    cnt = 1;
    for(auto xd : sx){
        cx[xd] = cnt;xc[cnt]=xd;cnt++;      
    }
  	int last;
    ll cont = 0;
    for(auto xd : sx){
        if(cont == 0) {cont++;last = xd;continue;} 
        disl[cont] = xd - last;
        last = xd;
        cont++;
    }
    cnt1 = 1;
    for(auto xd : sy){
        cy[xd] =cnt1;yc[cnt1] = xd;cnt1++;
    }
    cont = 0;
    for(auto xd : sy){
        if(cont == 0) {cont++;last = xd;continue;} 
        disr[cont] = xd- last;
        last = xd;
        cont++;
    }
    f(i,0,3005){
        f(j,0,3005){
            ri[i][j] = 1;
            iz[i][j] = 1;
        }
    }
    /*f(i,0,20){
        f(j,0,20){
          cout<<val[i][j];
        }
        cout<<endl;
    }*/
    //cout<<"------------"<<endl;
    for(auto xd : vx){
        //ll a = xd.fs.fs,b = xd.fs.sc,c = xd.sc; 
        for(int i = cx[xd.fs.fs];i<cx[xd.fs.sc];i++){
            ri[cy[xd.sc]][i] = 0;
        }
    }
    for(auto xd : vy){
        for(int i = cy[xd.fs.fs];i<cy[xd.fs.sc];i++){
            iz[cx[xd.sc]][i] = 0;
        }
    }
    //vis[cx[0]][cy[0]] = 0;
    /*f(i,0,20){
        f(j,0,20){
          cout<<vis[i][j];
        }
        cout<<endl;
    }*/
    
    if(bfs(cx[0],cy[0])) cout<<ans<<endl;
    else cout<<"INF"<<endl;
    return 0;
}

Measured memory_bytes: 30868