java 太慢了
by Celestial_Intertwine @ 2022-05-19 21:12:14
很有可能是java被卡常了
by happybob @ 2022-05-19 21:46:36
@[Eternal蒟蒻](/user/398190) 那该咋改一下呢?
by v7fgg @ 2022-05-20 19:32:25
@[happybob](/user/332914) 那该咋改一下呢?
by v7fgg @ 2022-05-20 19:32:50
我知道了，不是算法的原因，是输出没用快写的原因
```java
import java.util.*;
import java.io.*;
import java.math.*;
public class Main{
public static void main(String args[]) throws IOException{
Read sc=new Read();
int n=sc.nextInt(),m=sc.nextInt();
long preSum[]=new long[n+1];
for(int i=0;i<n;i++){
preSum[i+1]=sc.nextInt()+preSum[i];
}
SegTree sg=new SegTree(preSum,0,n-1);
buildTree(sg);
for(int i=0;i<m;i++){
int a=sc.nextInt();
if(a==1){
int x=sc.nextInt(),k=sc.nextInt();
addK(sg,x-1,k);
}
else{
int x=sc.nextInt(),y=sc.nextInt();
sc.println(findSum(sg,x-1,y-1));
}
}
sc.bw.flush();
sc.bw.close();
}
public static long findSum(SegTree sg,int l,int r){
if(l==sg.l&&r==sg.r){
return sg.sum;
}
int mid=(sg.l+sg.r)/2;
if(r<=mid){
return findSum(sg.left,l,r);
}
else if(l>=mid+1){
return findSum(sg.right,l,r);
}
return findSum(sg.left,l,mid)+findSum(sg.right,mid+1,r);
}
public static void addK(SegTree sg,int idx,int k){
sg.sum+=k;
if(sg.l==sg.r){
return;
}
int mid=(sg.l+sg.r)/2;
if(idx<=mid){
addK(sg.left,idx,k);
}
else{
addK(sg.right,idx,k);
}
}
public static void buildTree(SegTree t){
if(t.l==t.r){
return;
}
int mid=(t.l+t.r)/2;
long preSum[]=t.preSum;
t.left=new SegTree(preSum,t.l,mid);
t.right=new SegTree(preSum,mid+1,t.r);
buildTree(t.left);
buildTree(t.right);
}
}
class SegTree{
SegTree left,right;
int l,r;
long sum;
long preSum[];
public SegTree(long preSum[],int l,int r){
this.preSum=preSum;
this.l=l;
this.r=r;
sum=preSum[r+1]-preSum[l];
}
}
class Read{
BufferedReader bf;
StringTokenizer st;
BufferedWriter bw;
public Read(){
bf=new BufferedReader(new InputStreamReader(System.in));
st=new StringTokenizer("");
bw=new BufferedWriter(new OutputStreamWriter(System.out));
}
public String nextLine() throws IOException{
return bf.readLine();
}
public String next() throws IOException{
while(!st.hasMoreTokens()){
st=new StringTokenizer(bf.readLine());
}
return st.nextToken();
}
public char nextChar() throws IOException{
return next().charAt(0);
}
public int nextInt() throws IOException{
return Integer.parseInt(next());
}
public long nextLong() throws IOException{
return Long.parseLong(next());
}
public double nextDouble() throws IOException{
return Double.parseDouble(next());
}
public float nextFloat() throws IOException{
return Float.parseFloat(next());
}
public byte nextByte() throws IOException{
return Byte.parseByte(next());
}
public short nextShort() throws IOException{
return Short.parseShort(next());
}
public BigInteger nextBigInteger() throws IOException{
return new BigInteger(next());
}
public void println(int a) throws IOException{
bw.write(String.valueOf(a));
bw.newLine();
return;
}
public void print(int a) throws IOException{
bw.write(String.valueOf(a));
return;
}
public void println(String a) throws IOException{
bw.write(a);
bw.newLine();
return;
}
public void print(String a) throws IOException{
bw.write(a);
return;
}
public void println(long a) throws IOException{
bw.write(String.valueOf(a));
bw.newLine();
return;
}
public void print(long a) throws IOException{
bw.write(String.valueOf(a));
return;
}
public void println(double a) throws IOException{
bw.write(String.valueOf(a));
bw.newLine();
return;
}
public void print(double a) throws IOException{
bw.write(String.valueOf(a));
return;
}
}
```
by v7fgg @ 2022-05-25 23:06:53