本题链接:PTA | 程序设计类实验辅助教学平台
题目:
样例:
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4 5 |
思路:
这是一道模拟题,需要有耐心读题,跟着题目走一遍,就可以了。
代码详解如下:
#include <iostream>
#include <vector>
#include <queue>
#include <cstring>
#include <algorithm>
#include <unordered_map>
#define endl '\n'
#define int long long
#define YES puts("YES")
#define NO puts("NO")
#define umap unordered_map
#define All(x) x.begin(),x.end()
#pragma GCC optimize(3,"Ofast","inline")
#define IOS std::ios::sync_with_stdio(false),cin.tie(0), cout.tie(0)
using namespace std;
const int N = 2e6 + 10;
inline void solve();
signed main()
{
// freopen("a.txt", "r", stdin);
IOS;
int _t = 1;
// cin >> _t;
while (_t--)
{
solve();
}
return 0;
}
int n;
vector<int>a,b;
inline void solve()
{
int sum = 0;
int maxs = 0;
cin >> n;
int x;
cin >> x;
a.emplace_back(x); // 先拿第一个当底盘
for(int i = 1;i < n;++i)
{
cin >> x;
if(x < a.back()) a.emplace_back(x);
else
{
if(b.size())
{
if(x > b.back()) b.emplace_back(x);
else
{
++sum;
maxs = max(maxs,(int)a.size());
a.clear();
while(b.size() and b.back() > x)
{
a.emplace_back(b.back());
b.pop_back();
}
a.emplace_back(x);
}
}else b.emplace_back(x);
}
}
maxs = max(maxs,(int)a.size());
if(a.size()) ++sum;
if(b.size()) ++sum;
cout << sum << ' ' << maxs << endl;
}