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  • 算法模板——线段树5(区间开根+区间求和)

    实现功能——1:区间开根;2:区间求和(此模板以BZOJ3038为例)

    作为一个非常规的线段树操作,其tag也比较特殊呵呵哒

     1 var
     2    i,j,k,l,m,n:longint;
     3    a,b:array[0..500000] of int64;
     4 function max(x,y:longint):longint;inline;
     5          begin
     6               if x>y then max:=x else max:=y;
     7          end;
     8 function min(x,y:longint):longint;inline;
     9          begin
    10               if x<y then min:=x else min:=y;
    11          end;
    12 procedure built(z,x,y:longint);inline;
    13           begin
    14                if x=y then
    15                   begin
    16                        read(a[z]);
    17                        if a[z]<=1 then b[z]:=1 else b[z]:=0;
    18                   end
    19                else
    20                    begin
    21                         built(z*2,x,(x+y) div 2);
    22                         built(z*2+1,(x+y) div 2+1,y);
    23                         a[z]:=a[z*2]+a[z*2+1];
    24                         if (b[z*2]=1) and (b[z*2+1]=1) then b[z]:=1 else b[z]:=0;
    25                    end;
    26           end;
    27 function op(z,x,y,l,r:longint):int64;inline;
    28          var a2,a3,a4:int64;
    29          begin
    30               if l>r then exit(0);
    31               if b[z]=1 then exit(0);
    32               if (x=l) and (y=r) and (l=r) then
    33                  begin
    34                       a2:=a[z];
    35                       a[z]:=trunc(sqrt(a[z]));
    36                       if a[z]<=1 then b[z]:=1;
    37                       exit(a[z]-a2);
    38                  end;
    39               a2:=op(z*2,x,(x+y) div 2,l,min((x+y) div 2,r));
    40               a3:=op(z*2+1,(x+y) div 2+1,y,max((x+y) div 2+1,l),r);
    41               a[z]:=a[z]+a2+a3;
    42               if (b[z*2]=1) and (b[z*2+1]=1) then b[z]:=1;
    43               exit(a2+a3);
    44          end;
    45 function cal(z,x,y,l,r:longint):int64;inline;
    46          begin
    47               if l>r then exit(0);
    48               if (x=l) and (y=r) then exit(a[z]);
    49               exit(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((x+y) div 2+1,l),r));
    50          end;
    51 procedure swap(var x,y:longint);inline;
    52           var z:longint;
    53           begin
    54                z:=x;x:=y;y:=z;
    55           end;
    56 
    57 begin
    58      readln(n);
    59      built(1,1,n);
    60      readln;
    61      readln(m);
    62      for i:=1 to m do
    63          begin
    64               readln(j,k,l);
    65               if k>l then swap(k,l);
    66               case j of
    67                    1:writeln(cal(1,1,n,k,l));
    68                    0:op(1,1,n,k,l);
    69               end;
    70          end;
    71 end.
    72                  
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  • 原文地址:https://www.cnblogs.com/HansBug/p/4237737.html
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