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Codeforces Round #453 (Div. 2)...

A(水题)

#include <bits/stdc++.h>
using namespace std;
struct node {
	int x, y;
	bool operator<(const node k) const {
		return x < k.x;
	}
} a[105];
int main()
{
	int n, m, x, y;
	cin >> n >> m;
	for(int i = 0; i < n; ++i)
		cin >> a[i].x >> a[i].y;
	sort(a, a+n);
	int now = 0;
	for(int i = 0; i < n; ++i)
	{
		if(now >= a[i].x) 
			now = max(now, a[i].y);
	}
	if(now >= m) printf("YES\n");
	else printf("NO\n");
	return 0;
}
           

B(思维水题)

#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e4+5;
vector<int> g[maxn];
int ans, n, col[maxn];
void dfs(int u, int fa)
{
	if(col[u] != col[fa]) ++ans;
	for(int i = 0; i < g[u].size(); ++i)
	{
		int v = g[u][i];
		if(v == fa) continue;
		dfs(v, u);
	}
}
int main()
{
	scanf("%d", &n);
	for(int i = 2; i <= n; ++i)
	{
		int p;
		scanf("%d", &p);
		g[i].push_back(p);
		g[p].push_back(i);
	}
	for(int i = 1; i <= n; ++i)
		scanf("%d", &col[i]);
	col[0] = -1, ans = 0;
	dfs(1, 0);
	printf("%d\n", ans);
	return 0;
}
           

C(卡我英文水题)

#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e5+5;
int h, a[maxn], key;
vector<int> ans;
int main()
{
	scanf("%d", &h);
	key = 0;
	for(int i = 0; i <= h; ++i)
		scanf("%d", &a[i]);
	for(int i = 0; i < h; ++i)
		if(a[i] != 1 && a[i+1] != 1)
			key = i+1;
	if(!key) puts("perfect");
	else
	{
		int now = 0, pos, val;
		puts("ambiguous");
		for(int i = 0; i <= h; ++i)
		{
			for(int j = 1; j <= a[i]; ++j)
				ans.push_back(now);
			if(i == key)
			{
				pos = ans.size()-1;
				val = now-1;
			}
			now += a[i];
		}
		for(int i = 0; i < ans.size(); ++i)
		{
			if(i) printf(" ");
			printf("%d", ans[i]);
		}
		printf("\n");
		ans[pos] = val;
		for(int i = 0; i < ans.size(); ++i)
		{
			if(i) printf(" ");
			printf("%d", ans[i]);
		}
		printf("\n");
	}
	return 0;
}
           

时间总是过得炒鸡快...

回家了一周,瘫了一周...

真是好久没做题了,比赛也结束了一个多月了,没有刷题的动力了,复习期末考试以及做学期项目,学期末尾的几天也被占去了,头条面试结束四周多了,三面的通知还是没来,肯定是凉了,答了网络,却凉了OS,二面的算法题想的肯定是最优了,但是不知道为什么感觉面试官好像没明白...感觉是中途多次来电话导致电脑断网给面试官留下坏印象了。准备重学OS、组成原理、网络、数据结构各类基础以及转型Java组蓝桥都还没行动起来...不是不想行动,而是在家庭氛围中使我懒惰。确定要春招了,考研与否还在心底打转。

心绪糟乱,就不写了...