PAT (Basic Level) Practice （中文）1016 部分A+B (15 分)

3862767 6 13530293 3

399

3862767 1 13530293 8

0

// luogu-judger-enable-o2
#include<bits/stdc++.h>
#include<unordered_set>
#define rg register ll
#define inf 2147483647
#define min(a,b) (a<b?a:b)
#define max(a,b) (a>b?a:b)
#define ll long long
#define maxn 300005
#define lb(x) (x&(-x))
const double eps = 1e-6;
using namespace std;
inline ll read()
{
	char ch = getchar(); ll s = 0, w = 1;
	while (ch < 48 || ch>57) { if (ch == '-')w = -1; ch = getchar(); }
	while (ch >= 48 && ch <= 57) { s = (s << 1) + (s << 3) + (ch ^ 48); ch = getchar(); }
	return s * w;
}
inline void write(ll x)
{
	if (x < 0)putchar('-'), x = -x;
	if (x > 9)write(x / 10);
	putchar(x % 10 + 48);
}
ll a,b,c,d;
int main()
{
    cin>>a>>b>>c>>d;
    ll suma=0,sumb=0;
    while(a)
    {
        ll k=a%10;
        if(k==b)
        {
            suma=suma*10+k;
        }
        a/=10;
    }
    while(c)
    {
        ll k=c%10;
        if(k==d)
        {
            sumb=sumb*10+k;
        }
        c/=10;
    }
    cout<<suma+sumb<<endl;
   	return 0;
}