1230: [Usaco2008 nov]lites switch lamp

1230: [Usaco2008 nov]lites switch Light time limit:10 Sec Memory limit:162 MB
submit:1162 solved:589
[Submit] [Status] Description

Farmer John tries to keep his cows mentally agile by playing educational toys with the cows. One of the big toys is the lamp in the barn. N (2 <= n <= 100,000) Each head of a cow is consecutively numbered 1. N, standing under a colored lamp. All the lights were off when it was late in the evening. The cows use n buttons to control the light switch; Press the I button to change the status of the I light. Cows Execute m (1 <= m <= 100,000) instructions, each of which is one of two integers (0 <= instruction number <= 1). The 1th directive (denoted by 0) contains two digital s_i and e_i (1 <= s_i <= e_i <= N), which represent the start and stop switches. The cows just need to press the button between S_i and e_i to complete this instruction. The 2nd directive (denoted by 1) also contains two digits s_i and e_i (1 <= s_i <= e_i <= N), but this instruction asks how much of the light from s_i to e_i is lit. Help FJ to make sure his cows get the right answer.

Input

* Line 1th: Two integers separated by a space N and M

* Line 2..m+1: Each line represents an action, there are three integers separated by spaces: instruction number, s_i, and E_i

Output

1th: The number of times to ask for the result of the query, for each query.

Sample Input4 5
0 1 2
0 2 4
1 2 3
0 2 4
1 1 4

Input explanation:
A total of 4 lamps; 5 instructions. The following are the implementation scenarios:
Lights
1 2 3 4
Init:o o o o = off * = On
0 1 2 * * o o change the status of Lights 1 and 2
0 2 4 * * O * *
1 2 3-1 output in 2.. How many lights are lit in the range of 3
0 2 4 * * o O change the status of Lights 2, 3 and 4
1 1 4-2 output in 1.. How many lights are lit in the range of 4




Sample Output1
2
HINT Source

Gold

Puzzle: This is a more interesting line-segment tree problem-the general interval plus a number into the interval reversal, but it is also difficult to how many, or the same dozen Lazytag, the other did not (phile: It seems you this program and lazy crazy with ext push AH hehe hansbug: that is, But actually do not have to seem to be able to engage, just a little more.

1 var2 I,j,k,l,m,n:longint;3B:Array[0..1000000] ofLongint;4 functionMax (x,y:longint): Longint;inline;5          begin6               ifX>y ThenMax:=xElsemax:=y;7          End;8 functionmin (x,y:longint): Longint;inline;9          beginTen               ifX<y ThenMin:=xElsemin:=y; One          End; A procedurebuilt (z,x,y:longint), inline; -           begin -                ifX=y Then thea[z]:=0 -                Else -                    begin -Built (z*2, X, (X+y)Div 2); +Built (z*2+1, (X+y)Div 2+1, y); -a[z]:=a[z*2]+a[z*2+1]; +                    End; Ab[z]:=0; at           End; - procedureext (z,x,y:longint); inline; -           begin -                ifb[z]=0  Thenexit; -A[z]:= (y-x+1)-A[z]; -                ifX<>y Then in                   begin -b[z*2]:=1-b[z*2]; tob[z*2+1]:=1-b[z*2+1]; +                   End; -b[z]:=0; the           End; * functionop (z,x,y,l,r:longint): Longint;inline; $          varA1,a2,a3,a4:longint;Panax Notoginseng          begin -               ifL>r ThenExit0); the ext (z,x,y); +               if(x=l) and(Y=R) Then A                  begin theb[z]:=1; +Exit (((r-l+1)-a[z])-a[z]); -                  End; $A2:=op (z*2, X, (X+y)Div 2, L,min (R, (x+y)Div 2)); $A3:=op (z*2+1, (X+y)Div 2+1, Y,max (L, (x+y)Div 2+1), R); -a[z]:=a[z]+a2+A3; -Exit (a2+A3); the          End; - functioncal (Z,x,y,l,r:longint): Longint;inline;Wuyi          varA1,a2,a3,a4:longint; the          begin -               ifL>r ThenExit0); Wu ext (z,x,y); -               if(x=l) and(Y=R) Thenexit (A[z]); AboutExit (Cal (z*2, X, (X+y)Div 2, L,min (R, (x+y)Div 2)) +cal (z*2+1, (X+y)Div 2+1, Y,max (L, (x+y)Div 2+1) , R)); $          End; - begin - readln (n,m); -Built1,1, n); A       fori:=1  toM Do +          begin the readln (j,k,l); -                CaseJ of $                    0:begin theOp1,1, n,k,l); the                    End; the                    1:begin theWriteln (Cal (1,1, n,k,l)); -                    End; in               End; the          End; the Readln; About End. the         

1230: [Usaco2008 nov]lites switch lamp