int4399 @ 2024-07-29 19:53:32
#include <bits/stdc++.h>
using namespace std;
const int N=1e6+5;
int n,m,a[N];
struct tree{
int l,r;
long long maxx,lazy,fugai=-1e18;
}tr[N<<2];
void pushup(int u){
tr[u].maxx=max(tr[u<<1].maxx,tr[u<<1|1].maxx);
}
void fall(int u,long long v){
tr[u].maxx=v;
tr[u].lazy=0;
tr[u].fugai=v;
}
void fal(int u,long long v){
tr[u].maxx+=v;
tr[u].lazy+=v;
}
void pushdown(int u){
if(tr[u].fugai!=-1e18){
fall(u<<1,tr[u].fugai);fall(u<<1|1,tr[u].fugai);
tr[u].fugai=-1e18;
}
if(tr[u].lazy!=0){
fal(u<<1,tr[u].lazy);fal(u<<1|1,tr[u].lazy);
tr[u].lazy=0;
}
}
void build(int u,int l,int r){
tr[u].l=l,tr[u].r=r;
if(l==r){
tr[u].maxx=a[l];
return;
}
int mid=l+r>>1;
build(u<<1,l,mid);
build(u<<1|1,mid+1,r);
pushup(u);
}
long long check(int u,int l,int r){
if(l<=tr[u].l&&tr[u].r<=r) return tr[u].maxx;
long long res=-1e18,mid=tr[u].l+tr[u].r>>1;
pushdown(u);
if(l<=mid) res=max(res,check(u<<1,l,r));
if(mid<r) res=max(res,check(u<<1|1,l,r));
return res;
}
void change(int u,int l,int r,long long x){
if(l<=tr[u].l&&tr[u].r<=r){
tr[u].fugai=x;
tr[u].maxx=x;
tr[u].lazy=0;
return;
}
int mid=tr[u].l+tr[u].r>>1;
pushdown(u);
if(l<=mid) change(u<<1,l,r,x);
if(mid<r) change(u<<1|1,l,r,x);
pushup(u);
}
void add(int u,int l,int r,long long x){
if(l<=tr[u].l&&tr[u].r<=r){
tr[u].lazy+=x;
tr[u].maxx+=x;
return;
}
int mid=tr[u].l+tr[u].r>>1;
pushdown(u);
if(l<=mid) add(u<<1,l,r,x);
if(mid<r) add(u<<1|1,l,r,x);
pushup(u);
}
int main(){
ios::sync_with_stdio(0);
cin.tie(0);
cin>>n>>m;
for(int i=1;i<=n;i++) cin>>a[i];
build(1,1,n);
int op,l,r;
long long x;
for(int i=1;i<=m;i++){
cin>>op>>l>>r;
if(op==3) cout<<check(1,l,r)<<endl;
else
cin>>x;
if(op==1) change(1,l,r,x);
else add(1,l,r,x);
}
}
return 0;
}
by ___Furina___ @ 2024-07-29 19:58:20
@int4399 是否粘贴错了代码,只有20pts
by 5t0_0r2 @ 2024-07-29 19:59:29
@int4399 加的时候要判断如果区间推平的标记不为空(INF
)时只更新区间推平标记
by ___Furina___ @ 2024-07-29 20:00:31
@int4399 你的主函数大括号全乱了……
#include <bits/stdc++.h>
using namespace std;
const int N=1e6+5;
int n,m,a[N];
struct tree{
int l,r;
long long maxx,lazy,fugai=-1e18;
}tr[N<<2];
void pushup(int u){
tr[u].maxx=max(tr[u<<1].maxx,tr[u<<1|1].maxx);
}
void fall(int u,long long v){
tr[u].maxx=v;
tr[u].lazy=0;
tr[u].fugai=v;
}
void fal(int u,long long v){
tr[u].maxx+=v;
tr[u].lazy+=v;
}
void pushdown(int u){
if(tr[u].fugai!=-1e18){
fall(u<<1,tr[u].fugai);fall(u<<1|1,tr[u].fugai);
tr[u].fugai=-1e18;
}
if(tr[u].lazy!=0){
fal(u<<1,tr[u].lazy);fal(u<<1|1,tr[u].lazy);
tr[u].lazy=0;
}
}
void build(int u,int l,int r){
tr[u].l=l,tr[u].r=r;
if(l==r){
tr[u].maxx=a[l];
return;
}
int mid=l+r>>1;
build(u<<1,l,mid);
build(u<<1|1,mid+1,r);
pushup(u);
}
long long check(int u,int l,int r){
if(l<=tr[u].l&&tr[u].r<=r) return tr[u].maxx;
long long res=-1e18,mid=tr[u].l+tr[u].r>>1;
pushdown(u);
if(l<=mid) res=max(res,check(u<<1,l,r));
if(mid<r) res=max(res,check(u<<1|1,l,r));
return res;
}
void change(int u,int l,int r,long long x){
if(l<=tr[u].l&&tr[u].r<=r){
tr[u].fugai=x;
tr[u].maxx=x;
tr[u].lazy=0;
return;
}
int mid=tr[u].l+tr[u].r>>1;
pushdown(u);
if(l<=mid) change(u<<1,l,r,x);
if(mid<r) change(u<<1|1,l,r,x);
pushup(u);
}
void add(int u,int l,int r,long long x){
if(l<=tr[u].l&&tr[u].r<=r){
tr[u].lazy+=x;
tr[u].maxx+=x;
return;
}
int mid=tr[u].l+tr[u].r>>1;
pushdown(u);
if(l<=mid) add(u<<1,l,r,x);
if(mid<r) add(u<<1|1,l,r,x);
pushup(u);
}
int main(){
ios::sync_with_stdio(0);
cin.tie(0);
cin>>n>>m;
for(int i=1;i<=n;i++) cin>>a[i];
build(1,1,n);
int op,l,r;
long long x;
for(int i=1;i<=m;i++){
cin>>op>>l>>r;
if(op==3) cout<<check(1,l,r)<<endl;
else {//就这一处
cin>>x;
if(op==1) change(1,l,r,x);
else add(1,l,r,x);
}
}
return 0;
}
by ___Furina___ @ 2024-07-29 20:00:59
@5t0_0r2 不是这里的问题,就是主函数大括号出现了问题
by 5t0_0r2 @ 2024-07-29 20:02:24
@int4399 以下是 AC 代码
#include <bits/stdc++.h>
using namespace std;
const int N=1e6+5;
int n,m,a[N];
struct tree{
int l,r;
long long maxx,lazy,fugai=-1e18;
}tr[N<<2];
void pushup(int u){
tr[u].maxx=max(tr[u<<1].maxx,tr[u<<1|1].maxx);
}
void fall(int u,long long v){
tr[u].maxx=v;
tr[u].lazy=0;
tr[u].fugai=v;
}
void fal(int u,long long v){//这里要改
tr[u].maxx+=v;
if(tr[u].fugai != -1e18)
tr[u].fugai += v;
else
tr[u].lazy+=v;
}
void pushdown(int u){
if(tr[u].fugai!=-1e18){
fall(u<<1,tr[u].fugai);fall(u<<1|1,tr[u].fugai);
tr[u].fugai=-1e18;
}
if(tr[u].lazy!=0){
fal(u<<1,tr[u].lazy);fal(u<<1|1,tr[u].lazy);
tr[u].lazy=0;
}
}
void build(int u,int l,int r){
tr[u].l=l,tr[u].r=r;
if(l==r){
tr[u].maxx=a[l];
return;
}
int mid=l+r>>1;
build(u<<1,l,mid);
build(u<<1|1,mid+1,r);
pushup(u);
}
long long check(int u,int l,int r){
if(l<=tr[u].l&&tr[u].r<=r) return tr[u].maxx;
long long res=-1e18,mid=tr[u].l+tr[u].r>>1;
pushdown(u);
if(l<=mid) res=max(res,check(u<<1,l,r));
if(mid<r) res=max(res,check(u<<1|1,l,r));
return res;
}
void change(int u,int l,int r,long long x){
if(l<=tr[u].l&&tr[u].r<=r){
tr[u].fugai=x;
tr[u].maxx=x;
tr[u].lazy=0;
return;
}
int mid=tr[u].l+tr[u].r>>1;
pushdown(u);
if(l<=mid) change(u<<1,l,r,x);
if(mid<r) change(u<<1|1,l,r,x);
pushup(u);
}
void add(int u,int l,int r,long long x){
if(l<=tr[u].l&&tr[u].r<=r){
tr[u].lazy+=x;
tr[u].maxx+=x;
return;
}
int mid=tr[u].l+tr[u].r>>1;
pushdown(u);
if(l<=mid) add(u<<1,l,r,x);
if(mid<r) add(u<<1|1,l,r,x);
pushup(u);
}
int main(){
ios::sync_with_stdio(0);
cin.tie(0);
cin>>n>>m;
for(int i=1;i<=n;i++) cin>>a[i];
build(1,1,n);
int op,l,r;
long long x;
for(int i=1;i<=m;i++){
cin>>op>>l>>r;
if(op==3) cout<<check(1,l,r)<<endl;
else{
cin>>x;
if(op==1) change(1,l,r,x);
else add(1,l,r,x);
}
}
return 0;
}
by 5t0_0r2 @ 2024-07-29 20:03:35
6 看来我确实看错了(wssb)
by int4399 @ 2024-07-29 20:04:14
感谢两位大佬的建议,已关。