Submission #570221

#	Time	Username	Problem	Language	Result	Execution time	Memory
570221		Santos_Rivera	Mountains (NOI20_mountains)	C++14	64 / 100	2080 ms	4912 KiB

Mountains

#include<bits/stdc++.h>
using namespace std;
bool s(vector<long long> v, int n){
	int c=0;
	for(int i=0;i<n;i++){
		if(v[i]<=v[i+1]){
			c++;
		}
	}
	if(c==n){
		return true;
	}
	
	return false;
}
int main(){
	long long n,x,ci=0,cd=0,cont=0;
	cin>>n;
	vector<long long> v;
	v.reserve(n);
	for(int i=0;i<n;i++){
		cin>>x;
		v.push_back(x);
	}
	if(s(v,n)){
		cout<<"0 \n";
		return 0;
	}
	for(int i=1;i<n-1;i++){
		ci=0;cd=0;
		for(int j=0;j<i;j++){
			if(v[j]<v[i]){
				ci++;
			}
		}
		for(int k=i+1;k<n;k++){
			if(v[k]<v[i]){
				cd++;
			}
		}
		cont+=ci*cd;
	}
	cout<<cont<<endl;
}

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 9
• Subtask 4: 36 / 36
• Subtask 5: 28 / 28
• Subtask 6: 0 / 9
• Subtask 7: 0 / 12