#include <fstream>
#include <cstring>
using namespace std;
ifstream f("perb.in");
ofstream g("perb.out");

int n,i,m,a,b;
string s;

int main () {
    f >> n >> m;
    getline(f,s);
    for (i=1;i<=m;i++) {
        f >> a >> b;
        g << (b-a+1) << '\n';
    }
    f.close();g.close();
    return 0;
}