#include "iostream"
using namespace std;
#define size 201
int abs(int x)
{
    return x>=0?x:-x;
}
int main()
{
    int n, q, f[size][size];
    while(cin>>n>>q)
    {
        int i, j, k;
        int p[size];
        for(i=0; i<n; i++)
            cin>>p[i];
        for(i=0; i<n; i++)
            for(j=0; j<n; j++)
                f[i][j] = abs(p[i]-p[j])*abs(i-j);
        for(k=0; k<n; k++)
            for(i=0; i<n; i++)
                for(j=0; j<n; j++)
                    if(f[i][k]+f[k][j]<f[i][j])
                        f[i][j] = f[i][k]+f[k][j];
        while(q--)
        {
            int s, e, m;
            cin>>s>>e>>m;
            if(f[s-1][e-1]<=m)
                cout<<"Yes"<<endl;
            else
                cout<<"No"<<endl;
        }
    }
    return 0;
}