Daliy Algorithm (思维，堆，dfs)-- day 81

Nothing to fear

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种一棵树最好的时间是十年前，其次是现在！

那些你早出晚归付出的刻苦努力，你不想训练，当你觉的太累了但还是要咬牙坚持的时候，那就是在追逐梦想，不要在意终点有什么，要享受路途的过程，或许你不能成就梦想，但一定会有更伟大的事情随之而来。 mamba out~

2020.5.17

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人一我十，人十我百，追逐青春的梦想，怀着自信的心，永不言弃！

PAT-A1155 Heap Path

读题太慢 hhh

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <cstring>
#include <vector>
#include <queue>

using namespace std;

const int N = 10005;
int a[N] , n;
bool maxc = false,minc = false;
void dfs(int now,vector<int> path)
{
    int ls = now * 2;
    int rs = now * 2 + 1;
    if(ls > n && rs > n)
    {
        for(int i = 0; i < path.size() ;i ++)
        {
            if(i == path.size() - 1)printf("%d",path[i]);
            else printf("%d ",path[i]);
        }
        cout << endl;
        return;
    }
    if(rs <= n)
    {
        if(a[now] <= a[rs])minc = 1;
        else maxc = 1;
        path.push_back(a[rs]);
        dfs(rs , path);
        path.pop_back();
    }   
    if(ls <= n)
    {
        if(a[now] <= a[ls])minc = 1;
        else maxc = 1;
        path.push_back(a[ls]);
        dfs(ls , path);
        path.pop_back();
    }
}
int main()
{
    cin >> n;
    for(int i = 1;i <= n ;i ++)scanf("%d",&a[i]);
    vector<int> path;
    path.push_back(a[1]);
    dfs(1,path);
    if(minc && maxc)
    {
        cout << "Not Heap" << endl;
        return 0;
    }
    if(minc)cout << "Min Heap" << endl;
    if(maxc)cout << "Max Heap" << endl;
    return 0;
}

Sequence with Digits

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstdlib>
#include <cstring>
#include <vector>
#include <cassert>
#include <string>
#include <iomanip>
#include <cmath>
#include <ctime>
#define SIS std::ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
#define lowbit(x) (x & -x)
using namespace std;
typedef long long ll;
const int MAX = 0x7ffffff;
int t;

int getmin(ll x)
{
    int ans = 11;
    while(x)
    {
        int t = x % 10;
        ans = min(ans , t);
        x /= 10;
    }
    return ans;
}   
int getmax(ll x)
{
    int ans = -1;
    while(x)
    {
        int t = x % 10;
        ans = max(ans ,t);
        x /= 10;
    }
    return ans;
}
void slove()
{
    ll a, k , b;
    cin >> a >> k;
    b = a;
    while(k > 1)
    {
        b = a + getmax(a) * getmin(a);
        if(b == a)
        {
            cout << b << endl;
            return;
        }else a = b;
        k--;
    }
    cout << b << endl;
}
int main()
{
#ifdef LOCAL
    auto start_time = clock();
    cerr << setprecision(3) << fixed; // 在iomanip中
#endif
    SIS;
    cin >> t;
    while(t--)
    {
        slove();
    }
#ifdef LOCAL
    auto end_time = clock();
    cerr << "Execution time: " << (end_time - start_time) * (int)1e3 / CLOCKS_PER_SEC << " ms\n";
#endif
}

Young Explorers

题目读不懂真的是一大痛点

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstdlib>
#include <cstring>
#include <vector>
#include <cassert>
#include <string>
#include <iomanip>
#include <cmath>
#include <ctime>
#define SIS std::ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
#define lowbit(x) (x & -x)
using namespace std;
typedef long long ll;
const int MAX = 0x7ffffff;
int t;
/*
规定自身经验为 e 得人 所在的队伍的人数必须大于等于e
*/
bool cmp(int a,int b)
{
    return a > b;
}
void slove()
{
    int n;
    cin >> n;
    vector<int> a(n);
    for(int i = 0;i < n ;i ++)cin >> a[i];
    sort(a.begin(),a.end());
    int ans = 0, cnt = 0;
    for(int i = 0;i < n ;i ++)
    {
        if(++cnt == a[i])
        {
            ans++;cnt = 0;
        }
    }
    cout << ans << endl;
}
int main()
{
#ifdef LOCAL
    auto start_time = clock();
    cerr << setprecision(3) << fixed; // 在iomanip中
#endif
    SIS;
    cin >> t;
    while(t--)
    {
        slove();
    }
#ifdef LOCAL
    auto end_time = clock();
    cerr << "Execution time: " << (end_time - start_time) * (int)1e3 / CLOCKS_PER_SEC << " ms\n";
#endif
}

Alarm Clock

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstdlib>
#include <cstring>
#include <vector>
#include <cassert>
#include <string>
#include <iomanip>
#include <cmath>
#include <ctime>
#define SIS std::ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
#define lowbit(x) (x & -x)
using namespace std;
typedef long long ll;
const int MAX = 0x7ffffff;
int t;

void slove()
{
    // a 表示睡眠总时长
    // b 第一次醒来的时间
    // c 表示下一次定闹钟会多久后响
    // d 表示过去多久才能入睡
    ll a , b , c ,d , tot;
    cin >> a >> b >> c >> d;
    tot = b;
    a = a - b;
    int k = c - d;
    if(a <= 0)
    {
        cout << tot << endl;
        return;
    }
    if(k <= 0 && a > 0)
    {// 下不了床
        cout << -1 << endl;
        return;
    }
    if(k > 0 && a > 0)
    {
        ll t = ceil(a * 1.0 / k);
        cout << tot + (ll)t * c << endl;
    }
}
int main()
{
#ifdef LOCAL
    auto start_time = clock();
    cerr << setprecision(3) << fixed; // 在iomanip中
#endif
    SIS;
    cin >> t;
    while(t--)
    {
        slove();
    }
#ifdef LOCAL
    auto end_time = clock();
    cerr << "Execution time: " << (end_time - start_time) * (int)1e3 / CLOCKS_PER_SEC << " ms\n";
#endif
}