How many cities in the U.S. have a population greater than one million?
10
2
2
3
2
3
2
3
2
3
2
3
2
3
2
3
4
5
2
3
4
5
2
3
4
5
2
3
4
5
2
3
4
5
2
3
4
7
5
2
1
3
4
7
5
2
1
3
4
7
5
2
1
3
4
6
7
5
2
1
3
4
6
7
5
2
1
3
4
6
7
5
10
2
1
3
4
6
8
7
5
10
2
1
3
4
6
8
7
5
10
1
3
4
6
8
7
5
10
1
4
6
8
7
5
10
13
1
4
9
6
8
7
5
10
13
1
4
9
6
8
7
5
10
13
1
4
9
6
8
7
5
10
13
1
4
9
6
8
11
7
5
10
13
1
4
9
6
8
11
7
5
10
13
1
9
6
12
8
11
7
10
13
1
9
6
12
8
11
7
10
13
1
9
6
12
8
11
7
10
13
1
9
6
12
8
11
7
10
13
1
9
6
12
8
11
7
10
13
1
4 cities