
//include
//------------------------------------------
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <tuple>

using namespace std;

//conversion
//------------------------------------------
inline int toInt(string s) {int v; istringstream sin(s);sin>>v;return v;}
template<class T> inline string toString(T x) {ostringstream sout;sout<<x;return sout.str();}

//math
//-------------------------------------------
template<class T> inline T sqr(T x) {return x*x;}

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef vector<vector<PII> > VVPII;
typedef priority_queue<PII, vector<PII>, greater<PII> > PQPII;

//container util
//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define MT make_tuple
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())

//repetition
//------------------------------------------
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

//constant
//--------------------------------------------
const double EPS = 1e-10;
const double PI  = acos(-1.0);
const int DX[] = {0, 1, 0, -1};
const int DY[] = {-1, 0, 1, 0};

//other
//--------------------------------------------
#define RANGE(a, c, b) ((a <= b) && (b < c))

//clear memory
#define CLR(a) memset((a), 0 ,sizeof(a))

//debug
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;

const int INF = (int) 10e9;

int solve(int n, int m){
	VVPII node(n);
	vector<bool> done(n, false);
	char comma;
	REP(i, m){
		int from, to, cost;
		cin >> from >> comma >> to >> comma >> cost;
		node[from].PB(MP(cost, to));
		node[to].PB(MP(cost, from));
	}
	PQPII q;
	int result = 0;
	q.emplace(0, 0);
	VI costs(n, INF);
	while(!q.empty()){
		int w = q.top().first, u = q.top().second;
		q.pop();
		if(costs[u] < w) continue;
		result += w > 0 ? (w / 100) - 1 : 0 ;
		for(PII p : node[u]){
			if(p.first < costs[p.second] && !done[p.second]){
				done[u] = true;
				costs[p.second] = p.first;
				q.emplace(p.first, p.second);
			}
		}
	}
	return result;
}

int main(int argc, char const *argv[])
{
	for(int n, m; cin >> n, n;){
		cin >> m;
		cout << solve(n, m) << endl;
	}
	
	return 0;
}