ABC 283 ABCD

https://atcoder.jp/contests/abc283

A - Power

题目大意:

输出a的b次方。
Sample Input 1  
4 3
Sample Output 1  
64
#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<LL,LL> PII;
const LL MAXN=1e18;
const LL N=500200,M=2002;
int main()
{
    cin.tie(0); cout.tie(0); ios::sync_with_stdio(false);
    LL T=1;
    //cin>>T;
    while(T--)
    {
        LL a,b;
        cin>>a>>b;
        LL sum=pow(a,b);
        cout<<sum<<endl;
    }
    return 0;
}

B - First Query Problem

题目大意:

给定长度为n的序列A,q个操作,每个操作中是以下两种之一:

1 k x : A[k]=x; 
2 k : 输出A[k]。
Sample Input 1 
3
1 3 5
7
2 2
2 3
1 3 0
2 3
1 2 8
2 2
2 1
Sample Output 1  
3
5
0
8
1
#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<LL,LL> PII;
const LL MAXN=1e18;
const LL N=500200,M=2002;
LL a[N];
int main()
{
    cin.tie(0); cout.tie(0); ios::sync_with_stdio(false);
    LL T=1;
    //cin>>T;
    while(T--)
    {
        LL n;
        cin>>n;
        for(int i=1;i<=n;i++)
            cin>>a[i];
        LL q;
        cin>>q;
        while(q--)
        {
            LL op;
            cin>>op;
            if(op==1)
            {
                LL k,x;
                cin>>k>>x;
                a[k]=x;
            }
            else
            {
                LL k;
                cin>>k;
                cout<<a[k]<<endl;
            }
        }
    }
    return 0;
}

C - Cash Register

题目大意:

给定一个字符串s由数字组成,11 keys: 00, 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9

问我们打出这个字符串最少要按多少个键?
Sample Input 1  
40004
Sample Output 1  
4
#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<LL,LL> PII;
const LL MAXN=1e18;
const LL N=500200,M=2002;
LL a[N];
int main()
{
    cin.tie(0); cout.tie(0); ios::sync_with_stdio(false);
    LL T=1;
    //cin>>T;
    while(T--)
    {
        string s;
        cin>>s;
        LL sum=0;
        for(int i=0;i<s.size();i++)
        {
            if(s[i]=='0'&&s[i+1]=='0') i++;
            sum++;
        }
        cout<<sum<<endl;
    }
    return 0;
}

D - Scope

题目大意:

在所有括号都成功配对的情况下,字母的气球不能重复:
(:不做任何操作
):拿完直到和此右括号匹配的左括号
字母:这里还留有同一个字母的就不行,没有就行
Sample Input 1  
((a)ba)
Sample Output 1  
Yes
#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<LL,LL> PII;
const LL MAXN=1e18;
const LL N=500200,M=2002;
int main()
{
    cin.tie(0); cout.tie(0); ios::sync_with_stdio(false);
    LL T=1;
    //cin>>T;
    while(T--)
    {
        string s;
        cin>>s;
        vector<char> v;
        map<char,LL> mp;
        bool flag=true;
        for(int i=0;i<s.size();i++)
        {
            if(s[i]=='(') v.push_back(s[i]);
            else if(s[i]==')')
            {
                for(int j=v.size()-1;j>=0;j--)
                {
                    //cout<<v[j]<<endl;
                    if(v[j]=='(')
                    {
                        v.pop_back();
                        break;
                    }
                    else
                    {
                        //cout<<"sa"<<endl;
                        mp[v[j]]--;
                        v.pop_back();
                    }
                }
            }
            else
            {
                v.push_back(s[i]);
                mp[s[i]]++;
                if(mp[s[i]]>=2)
                {
                    //cout<<s[i]<<endl;
                    flag=false;
                }
            }
            if(flag==false) break;
        }
        if(flag==false) cout<<"No"<<endl;
        else cout<<"Yes"<<endl;
    }
    return 0;
}
posted @ 2022-12-25 12:05  Vijurria  阅读(22)  评论(0编辑  收藏  举报