Created
July 10, 2013 08:36
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TYVJ1661 (树状数组、Pascal)
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const | |
maxn=100000; | |
var | |
f:array [0..maxn] of int64; | |
n,k,l,r,i:longint; | |
order:char; | |
tmp,x:int64; | |
function lowbit(x:longint):longint; | |
begin | |
exit(x and (x xor (x-1))); | |
end; | |
procedure add(l,r:longint; x:int64); | |
var | |
i,j:longint; | |
begin | |
for i:=l to r do | |
begin | |
j:=i; | |
while (j<=n) do | |
begin | |
inc(f[j],x); | |
inc(j,lowbit(j)); | |
end; | |
end; | |
end; | |
function sum(l,r:longint):int64; | |
function sum_t(p:longint):int64; | |
begin | |
sum_t:=0; | |
while p>0 do | |
begin | |
inc(sum_t,f[p]); | |
dec(p,lowbit(p)); | |
end; | |
end; | |
begin | |
exit(sum_t(r)-sum_t(l-1)); | |
end; | |
begin | |
readln(n,k); | |
for i:=1 to n do | |
begin | |
read(tmp); | |
add(i,i,tmp); | |
end; | |
readln; | |
for i:=1 to k do | |
begin | |
read(order,l,r); | |
if order='C' then writeln(sum(l,r)) else | |
begin | |
read(x); | |
if order='-' then x:=-x; | |
add(l,r,x); | |
end; | |
readln; | |
end; | |
end. |
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