Contest3145 - the 37th game of 2021 freshman individual training match_ B: Password

 

 

A - Large integer addition

//
// " Just increase the number of digits of the password to no more than 200 It's just a bit "

//  Conventional high precision 
#include<bits/stdc++.h>
using namespace std;

const int MAXN=222;

char a[MAXN],b[MAXN],ans[MAXN];

void init()
{
    memset( a,0,sizeof( a ) );
    memset( b,0,sizeof( b ) );
    memset( ans,0,sizeof( ans ) );
}

void process( char str[] )
{
    char *p1=str;
    char *p2=str+strlen(str)-1;
    char temp;

    while( p1<p2 )
    {
        temp=*p1; *p1=*p2; *p2=temp;
        p1++; p2--;
    }

    for( int i=0;str[i];i++ ) str[i]-='0';
}

int main()
{
    int i,pro;  init();

    while( ~scanf("%s%s",&a,&b) )
    {
        process(a); process(b);

        pro=0;
        for( i=0;i<MAXN-5;i++ )
        {
            ans[i]=( a[i]+b[i]+pro )%10;
            pro=( a[i]+b[i]+pro )/10;
        }

        for( i=MAXN-5; ans[i]==0 && i ;i-- );
        for( ;i>=0;i-- ) printf("%d",ans[i]);
        printf("\n");
        init();
    }
    return 0;
}