求助,只AC了两个,写的正序
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求助,只AC了两个,写的正序
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Featherwit022楼主2024/12/25 21:10
#include<iostream>
#include<cstdio>
#include<stack>
using namespace std;
int arr[80005];
int  n;
stack<int>Stack;
long long ans;
int main(){
	scanf("%d",&n);
	for(int i=1;i<=n;++i){
		scanf("%d",&arr[i]);
	}
	for(int i=1;i<=n;++i){
		while(!Stack.empty()&&arr[Stack.top()]<arr[i]){
			ans+=i-Stack.top()-1;
			Stack.pop();
		}
		Stack.push(i);
	}
	long long cnt=0;
	while(!Stack.empty()){
		ans+=cnt++;
		Stack.pop();
	}
	printf("%lld",ans);
	return 0;
}
2024/12/25 21:10
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