Function test

code/mathematics/floor_sum.test.cpp:23–36

    return cnt;
}
void test() {
    rep(n,0,100) {
        rep(a,1,100) rep(b,1,100) {
            rep(c,0,100) {
                if (c-n*a < 0) continue;
                // ll ans = floor_sum_super_slow(n,a,b,c);
                ll ans2 = floor_sum_slow(n,a,b,c);
                ll ans3 = floor_sum(n,a,b,c);
                // assert_equal(ans,ans2, true);
                assert_equal(ans2,ans3,true);
            }
        }
    }
}