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#594252#9313. Make MaxliyutengCompile Error//C++141.3kb2024-09-27 20:35:542024-09-27 20:35:56

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  • [2024-09-27 20:35:56]
  • 评测
  • [2024-09-27 20:35:54]
  • 提交

answer

#include<bits/stdc++.h>
#define int long long
using namespace std;
int fa[201001];
bool vis[201001];
int size[201001];
int sum=0;
struct node{
	int x,y;
}a[201001];
int find(int x){
	if(fa[x]==x)return x;
	else return fa[x]=find(fa[x]);
} 
bool cmp(node a,node b){
	if(a.x==b.x)return a.y<b.y;
	else return a.x<b.x;
}
void merge(int x,int y){
	int tx=find(x);
	int ty=find(y);
	fa[ty]=tx;
	size[tx]+=size[ty];
	sum+=size[ty];
	//cout<<"为答案贡献:"<<size[ty]<<endl;
}
int main(){
	int t;
	cin>>t;
	while(t--){
		int n;
		cin>>n;
		sum=0;
		memset(vis,0,sizeof(vis));
		memset(size,0,sizeof(size));
		for(int i=1;i<=n;i++){
			fa[i]=i;
		}
		for(int i=1;i<=n;i++){
			cin>>a[i].x;
			a[i].y=i;
		}
		sort(a+1,a+1+n,cmp);
		for(int i=1;i<=n;i++){
			vis[a[i].y]=1;
			size[a[i].y]=1;
			//cout<<"i:"<<i<<" "<<a[i].y<<endl;
			if(vis[a[i].y+1]){
				//cout<<1<<endl;
				merge(a[i].y,a[i].y+1);
			}
			if(vis[a[i].y-1]){
				//cout<<2<<endl;
				if(a[i-1].x==a[i].x&&a[i-1].y==a[i].y-1){
					//cout<<"01"<<endl;
					int tx=find(a[i].y-1);
					int ty=find(a[i].y);
					fa[ty]=tx;
					size[tx]++;
				}else{
					//cout<<"02"<<endl;
					merge(a[i].y,a[i].y-1);
				}
			}
		}
		cout<<sum<<endl;
	}
	return 0;
}

详细

cc1plus: error: ‘::main’ must return ‘int’