【数据结构】点修改段查询
1 var 2 a,b:array[0..10000] of integer; 3 i,n:integer; 4 procedure edit(l,r,delta:integer); 5 var 6 i:integer; 7 begin 8 b[l]:=b[l]+delta; 9 b[r+1]:=b[r+1]-delta; 10 end; 11 12 function find(k:integer):integer; 13 var 14 i:integer; 15 begin 16 for i:=1 to k do inc(find,b[i]); 17 end; 18 begin 19 readln(n); 20 for i:=1 to n do read(a[i]); 21 for i:=1 to n do b[i]:=a[i]-a[i-1]; 22 end.