等一下，怎么变成拼音了？
by YuRuochen @ 2022-12-13 17:19:26
样例没过，实测36，代码在这儿：
```cpp
#include<bits/stdc++.h>
#define N 5005
using namespace std;
int n,ans;
struct Rectangle{
int x1,y1,x2,y2;
} rs[N];
vector<int> xx,yy;
struct Line{
int x,f;
friend bool operator<(const Line a,const Line b){
return a.x<b.x;
}
};
vector<Line> ls;
void updatex(int x){
ls.clear();
for(int i=1;i<=n;i++){
if(x>=rs[i].x1&&x<=rs[i].x2){ls.push_back({rs[i].y1,1});ls.push_back({rs[i].y2,-1});}
}
}
void updatey(int y){
ls.clear();
for(int i=1;i<=n;i++){
if(y>=rs[i].y1&&y<=rs[i].y2){ls.push_back({rs[i].x1,1});ls.push_back({rs[i].x2,-1});}
}
}
void updatels(){
sort(ls.begin(),ls.end());
for(int i=0;i<ls.size()-1;i++){
if(ls[i].x==ls[i+1].x){ls[i+1].f+=ls[i].f;ls.erase(ls.begin()+i);}
}
}
int sum(){
int s=0,last,ans=0;
for(int i=0;i<ls.size();i++){
if(!s) last=i;
if(!(s+ls[i].f)) ans+=2;
s+=ls[i].f;
}
return ans;
}
int main(){
scanf("%d",&n);
for(int i=1;i<=n;i++) scanf("%d%d%d%d",&rs[i].x1,&rs[i].y1,&rs[i].x2,&rs[i].y2);
for(int i=1;i<=n;i++){xx.push_back(rs[i].x1);xx.push_back(rs[i].x2);}
sort(xx.begin(),xx.end());
xx.resize(unique(xx.begin(),xx.end())-xx.begin());
for(int i=1;i<xx.size();i++){
updatex(xx[i]);
updatels();
ans+=sum()*(xx[i]-xx[i-1]);
}
for(int i=1;i<=n;i++){yy.push_back(rs[i].y1);yy.push_back(rs[i].y2);}
sort(yy.begin(),yy.end());
yy.resize(unique(yy.begin(),yy.end())-yy.begin());
for(int i=1;i<yy.size();i++){
updatey(yy[i]);
updatels();
ans+=sum()*(yy[i]-yy[i-1]);
}
printf("%d",ans);
return 0;
}
```
求各位dalao帮我调调代码！
@[gesong](/user/658198) @[what_can_I_do](/user/658973)
by YuRuochen @ 2022-12-13 17:30:39