【蓝桥杯第十届省赛B】（部分详解）

特别数的和

#include <iostream>
#include <string>
using LL=long long;
using namespace std;int main() {LL n;cin >> n;LL cnt = 0;for (LL i = 1; i <= n; i++) {string s = to_string(i);for (LL j = 0; j < s.size(); j++) {if (s[j] == '2' || s[j] == '0' || s[j] == '1' || s[j] == '9') {cnt += i;break; // 在找到符合条件的数字后退出内层循环}}}cout << cnt;return 0;
}

数列求值

#include <iostream>
using namespace std;
const int n=20190325;
int a[n]={0,1,1,1};
int main()
{for(int i=4;i<=n;i++){a[i]=(a[i-1]+a[i-2]+a[i-3])%10000;//注意范围}cout<<a[20190324];// 请在此输入您的代码return 0;
}

组队

方法一：神经网络算法

#include <iostream>
using namespace std;
int main()
{cout<<500-3-1-1-3-2;return 0;
}

方法二：解题区cv大法(谢谢佬）

#include <iostream>
int main()
{// 请在此输入您的代码int aa[]={97,92,0,0,89,82,0,0,0,95,0,0,94,0,0,0,98,93,0,0};int bb[]={90,85,0,0,83,86,0,97,0,99,0,0,91,83,0,0,83,87,0,99};int cc[]={0,96,0,0,97,0,0,96,89,0,96,0,0,87,98,0,99,92,0,96};int dd[]={0,0,0,80,0,0,87,0,0,0,97,93,0,0,97,93,98,96,89,95};int ee[]={0,0,93,86,0,0,90,0,0,0,0,98,0,0,98,86,81,98,92,81};int a,b,c,d,e,n,max=0;for(a=1;a<20;a++){for(b=1;b<20;b++){for(c=1;c<20;c++){for(d=1;d<20;d++){for(e=1;e<20;e++){n=aa[a]+bb[b]+cc[c]+dd[d]+ee[e];if(max<=n&&a!=b&&a!=c&&a!=d&&a!=e&&b!=c&&b!=d&&b!=e&&c!=d&&c!=e&&d!=e){ max=n; }}}}}}
cout<<max;
return 0;
}

年号字符串

#include <bits/stdc++.h>
using namespace std;
int main()
{char a[27];for (int i = 1; i <= 26; i++)a[i] = (char)(65+i-1);int x = 2019 / 26 / 26;int y = 2019 / 26 % 26;int z = 2019 % 26;cout << a[x] << a[y] << a[z] << endl;return 0;
}