#include <bits/stdc++.h>
            #include<iostream>
            #include<cstdio>
            #include<vector>
            #include<queue>
            #include<map>
            #include<cstring>
            #include<string>
            #include <math.h>
            #include<algorithm>
        //    #include <boost/multiprecision/cpp_int.hpp>
            #include<functional>
 //    #define int long long
            #define mod  1000000007
            #define pa pair<int,int>
            #define ll long long
            #define pal pair<double,int>
            #define ppa pair<int,pa>
            #define ssa pair<string,int>
            #define  mp make_pair
            #define  pb push_back
            #define EPS (1e-10)
            #define equals(a,b) (fabs((a)-(b))<EPS)
     
            using namespace std;
     //priority_queue<int, vector<int>, greater<int> > que;
            class Point{
            	public:
            	double x,y;
            	Point(double x=0,double y=0):x(x),y(y) {}
            	Point operator + (Point p) {return Point(x+p.x,y+p.y);}
            	Point operator - (Point p) {return Point(x-p.x,y-p.y);}
            	Point operator * (double a) {return Point(x*a,y*a);}
            	Point operator / (double a) {return Point(x/a,y/a);}
            	double absv() {return sqrt(norm());}
            	double norm() {return x*x+y*y;}
            	bool operator < (const Point &p) const{
            		return x != p.x ? x<p.x: y<p.y;
            	}
            	bool operator == (const Point &p) const{
            		return fabs(x-p.x)<EPS && fabs(y-p.y)<EPS;
            	}
            };
            typedef Point Vector;
     
            struct Segment{
            Point p1,p2;
            };
     
        double hen(Vector a){
        if(fabs(a.x)<EPS && a.y>0) return acos(0);
        else if(fabs(a.x)<EPS && a.y<0) return 3*acos(0);
        else if(fabs(a.y)<EPS && a.x<0) return 2*acos(0);
        else if(fabs(a.y)<EPS && a.x>0) return 0.0;
        else if(a.y>0) return acos(a.x/a.absv());
        else return 2*acos(0)+acos(-a.x/a.absv());
     
        }
     
string itos( int i ) {
ostringstream s ;
s << i ;
return s.str() ;
}

int gcd(int v,int b){
	if(v>b) return gcd(b,v);
	if(v==b) return b;
	if(b%v==0) return v;
	return gcd(v,b%v);
}
            double dot(Vector a,Vector b){
            	return a.x*b.x+a.y*b.y;
            }
            double cross(Vector a,Vector b){
            	return a.x*b.y-a.y*b.x;
            }
        
double distans(double x1,double y1,double x2,double y2){
	double rr=(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2);
	return sqrt(rr);
	
}
 /*
int beki(int a, int r){
	if(r==0)return 1;
	if(r==1) return a%mod; 
	if(r%2==1){
		int y=beki(a,r-1);
		return(y*a)%mod;
		
	}
	int yy=beki(a,r/2);
	return (yy*yy)%mod;
}
 */
 int inf=mod*2;
            //----------------kokomade tenpure------------

int n,k;
int a[1010][105][105]={0};
int b[1010][3];
    signed  main(){
	
    	for(int i=0;i<1010;i++)for(int j=0;j<=104;j++)for(int k=0;k<=104;k++){
    		a[i][j][k]=100000004;
    		if(j==k) a[i][j][k]=0;
    	}
    	cin>>n;
    	int m;
    	cin>>m;
    	
    	for(int i=1;i<=m;i++){
    		int a1,a2,a3;
    		cin>>a1>>a2>>a3;
    		b[i][0]=a1;
    		b[i][1]=a2;
    		b[i][2]=a3;
    //		cin>>b[i][0]>>b[i][1]>>b[i][2];
    		for(int j=0;j<=m;j++){
    			if(i==j) continue;
    			a[j][a2][a1]=a3;
    			a[j][a1][a2]=a3;
    		}
    		
    	}
    	
    	
    	for(int i=0;i<=m;i++){
    		
    		for(int j=1;j<=n;j++)for(int k=1;k<=n;k++)for(int l=1;l<=n;l++){
    			a[i][k][l]=min(a[i][k][l],a[i][k][j]+a[i][j][l]);
    		}
    	}
    	int ans=0;
    	/*
    	for(int i=0;i<=m;i++){
    		cout<<i<<endl;
    		for(int j=1;j<=n;j++){
    			for(int k=1;k<=n;k++){
    			cout<<a[i][j][k]<<" ";
    		}
    			cout<<endl;
    		}
    	}
    	*/
    	for(int i=1;i<=m;i++){
    		bool bb=true;
    	//	cout<<i<<endl;
    		int u=0;
    		for(int k=1;k<=n;k++)for(int lm=1;lm<=n;lm++){
    			if((a[i][k][lm] >= a[i][k][b[i][0]]+b[i][2]+a[i][b[i][1]][lm] )|| ( a[i][k][lm] >= a[i][k][b[i][1]]+b[i][2]+a[i][b[i][0]][lm]) ){
    		//		cout<<i<<" "<<k<<" "<<lm<<endl;
    			u++;
    			}
    			else{
    			//	u++;
    					
    			}
    		}
    	//	cout<<i<<" "<<u<<endl;
    		
    		if(u>0&& i>0) {
    			ans++;
    		//	cout<<i<<endl;
    		}
    	}
    	cout<<m-ans<<endl;
    	
    	return 0;
    }
    //printf("%d %.10f %.10f\n",i,xx/ri,yy/ri);

Measured memory_bytes: 43776