#include <iostream>
#include <map>
#include <vector>
using namespace std;

struct npair
{
    int b;
    int h;
    npair(int nb,int nh)
    {
        b = nb;
        h = nh;
    }
};

int main()
{
    map<int,vector<npair> > lennot();
    int n,m;
    cin >> n >> m;
    for (int i = 0; i < m; i++ )
    {
        int a,b,h;
        cin >> a >> b >> h;
        npair tp(b,h);
        lennot[a].push_back(tp);
    }

l.cpp: In function ‘int main()’:
l.cpp:42:11: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   lennot[a].push_back(tp);
           ^
l.cpp:42:13: error: request for member ‘push_back’ in ‘*(lennot + ((sizetype)a))’, which is of non-class type ‘std::map<int, std::vector<npair> >()’
   lennot[a].push_back(tp);
             ^