AcWing 第 98 场周赛 ABC
https://www.acwing.com/activity/content/competition/problem_list/3128/
4947. 大整数
题目大意:
给定n,k。输出n个k。
输入样例:
3 2
输出样例:
222
#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<LL,LL> PII;
const LL MAXN=1e18,MINN=-MAXN,INF=0x3f3f3f3f;
const LL N=1e6+10,M=2023;
const LL mod=100000007;
const double PI=3.1415926535;
#define endl '\n'
int main()
{
cin.tie(0); cout.tie(0); ios::sync_with_stdio(false);
LL T=1;
//cin>>T;
while(T--)
{
LL n,k;
cin>>n>>k;
for(int i=1;i<=n;i++)
{
cout<<k;
}
}
return 0;
}
4948. 大乘积
输入样例1:
3
5 10 1
输出样例1:
50
输入样例2:
4
1 1 10 11
输出样例2:
110
输入样例3:
5
0 3 1 100 1
输出样例3:
0
#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<LL,LL> PII;
const LL MAXN=1e18,MINN=-MAXN,INF=0x3f3f3f3f;
const LL N=1e6+10,M=2023;
const LL mod=100000007;
const double PI=3.1415926535;
#define endl '\n'
string s[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>>s[i];
}
LL sum=0;
string beg="1";
for(int i=1;i<=n;i++)
{
if(s[i]=="0")
{
cout<<"0";
return 0;
}
else
{
bool flag=true;
LL zero=0;
for(int j=0;j<s[i].size();j++)
{
if(j>=1&&s[i][j]=='0') zero++;
}
if(s[i][0]!='1'||zero!=s[i].size()-1) flag=false;
if(flag==false) beg=s[i];
else sum+=s[i].size()-1;
}
}
cout<<beg;
for(int i=1;i<=sum;i++)
{
cout<<"0";
}
}
return 0;
}
4949. 末尾连续0
输入样例1:
1
输出样例1:
5
5 6 7 8 9
输入样例2:
5
输出样例2:
0
#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<LL,LL> PII;
const LL MAXN=1e18,MINN=-MAXN,INF=0x3f3f3f3f;
const LL N=1e6+10,M=2023;
const LL mod=100000007;
const double PI=3.1415926535;
#define endl '\n'
LL mp[10];
int main()
{
cin.tie(0); cout.tie(0); ios::sync_with_stdio(false);
LL T=1;
//cin>>T;
while(T--)
{
LL m;
cin>>m;
vector<LL> v;
for(LL i=1;i<=1e7;i++)
{
LL t=i;
while(t%2==0) mp[2]++,t/=2;
while(t%5==0) mp[5]++,t/=5;
if(min(mp[2],mp[5])==m) v.push_back(i);
}
cout<<v.size()<<endl;
for(int i:v)
{
cout<<i<<" ";
}
}
return 0;
}