Submission #833460

#	Time	Username	Problem	Language	Result	Execution time	Memory
833460		vjudge1	Exam (eJOI20_exam)	C++98	0 / 100	12 ms	1100 KiB

exam

#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N = 1005;

int par[N], sz[N];
bool vis[N];

int n, cnt = 0, input, x;
	bool s1 = false, s2, s3, s4 = true;
	vector<int> h;
	vector<int> t;
	
int findpar(int a){
	if(a == par[a]) return a;
	return par[a] = findpar(par[a]);
}

void merge(int a, int b){
	a = findpar(a);
	b = findpar(b);
	if(a == b) return;
	par[b] = a;
	sz[a] += sz[b];
}

void dfs(int a){
	vis[a] = true;
	if(a+1 < n){
		if(a+1 < n && h[a+1] <= t[0]){
			merge(a, a+1);
		}
	}
	if(a-1 >= 0){
		if(a-1 >= 0 && h[a-1] <= t[0]){
			merge(a, a-1);
		}
	}
	if(a+1 < n){
		if(a+1 < n && h[a+1] <= t[0] && !vis[a+1]) dfs(a+1);
	}
	if(a-1 >= 0){
		if(a-1 >= 0 && h[a-1] <= t[0] && !vis[a-1]) dfs(a-1);
	}
}

int main(){
	cin >> n;
	for(int i = 0; i < n; i++){
		cin >> input;
		h.push_back(input);
	}
	for(int i = 0; i < n; i++){
		cin >> input;
		t.push_back(input);
	}
	for(int i = 0; i < N; i++){
		par[i] = i;
		sz[i] = 1;
		vis[i] = false;
	}
	s2 = true;
	for(int i = 1; i < n; i++){
		if(t[i] != t[i-1]) s2 = false;
	}
	
	s3 = false;
	for(int i = 1; i < n; i++){
		if(t[i] <= t[i-1]) s3 = false;
	}
	if(n <= 10) s1 = true;
	if(s1){
		
	}
	if(s2){
		for(int i = 0; i < n; i++){
			if(h[i] == t[0]) dfs(i);
		}
		for(int i = 0; i < N; i++){
			vis[i] = false;
		}
		for(int i = 0; i < n; i++){
			x = findpar(i);
			if(vis[x]) continue;
			vis[x] = true;
			if(sz[x] != 1 || (sz[x] == 1 && h[x] == t[0])){
				cnt += sz[x];
			}
		}
		cout << cnt;
		return 0;
	}
	if(s3 || s4){
		vector<int> lis;
		vector<int>::iterator it;
		for(int i = 0; i < n; i++){
			it = lower_bound(lis.begin(),lis.end(), t[i]);
			if(it == lis.end()){
				lis.push_back(t[i]);
			}
			else{
				*it = t[i];
			}
		}
	}
}

• Subtask 1: 0 / 14
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 23
• Subtask 5: 0 / 16
• Subtask 6: 0 / 22