Missing number

2
3
3 4 5
1
1

1 2
2 3

AC代码：

#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;

int vis[1005];

int main() {
	int T, n;
	scanf("%d", &T);
	while(T--) {
		scanf("%d", &n);
		memset(vis, 0, sizeof(vis));
		int m = n + 2, a, b, flag = 1;
		while(n--) {
			scanf("%d", &a);
			vis[a] = 1;
		}
		for(int i=1; i<=m; i++) {
			if(!vis[i] && flag == 1) {
				a = i; flag = 2;
			}
			else if(!vis[i] && flag == 2) {
				b = i; break;
			}   
		}
		printf("%d %d\n", a, b);
	}
	return 0;
} 

Fibonacci

3
4
17
233

Yes
No
Yes

AC代码：

#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
#include <queue>
#include <map>
#define LL long long
using namespace std;

const int MAX = 1000000010L;
LL fibo[50] = {0, 1};
map<LL, bool> ma;

void init() {
	queue<LL> q;
	int flag;
	for(int i=2; i<50; i++) {
		fibo[i] = fibo[i-1] + fibo[i-2];
		if(fibo[i] > MAX) {
			flag = i; break;
		}
	}
	
	for(int i = 0; i < flag; i++) {
		q.push(fibo[i]); ma[fibo[i]] = true;
	}
	
	while(!q.empty()) {
		LL tmp = q.front();
		q.pop();
		for(int i = 2; i <= flag; i++) {
			LL t = tmp*fibo[i];
			if(t > MAX) break;
			if(ma[t]) continue;
			else {
				ma[t] = true;
				q.push(t);
			}
		}
	}
}

int main() {
	init();
	LL T, n;
	cin >> T;
	while(T--) {
		cin >> n;
		if(ma[n]) printf("Yes\n");
		else printf("No\n");
	} 
	return 0;
} 

HDU - 5166 - Missing number && 5167 - Fibonacci

原文：http://blog.csdn.net/u014355480/article/details/43622147