hdu 4726(贪心)
Kia's Calculation
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 3291 Accepted Submission(s): 703
Ghee is teaching Kia how to calculate the sum of two integers. But Kia
is so careless and alway forget to carry a number when the sum of two
digits exceeds 9. For example, when she calculates 4567+5789, she will
get 9246, and for 1234+9876, she will get 0. Ghee is angry about this,
and makes a hard problem for her to solve:
Now Kia has two integers A
and B, she can shuffle the digits in each number as she like, but
leading zeros are not allowed. That is to say, for A = 11024, she can
rearrange the number as 10124, or 41102, or many other, but 02411 is not
allowed.
After she shuffles A and B, she will add them together, in her own way. And what will be the maximum possible sum of A "+" B ?
For each test case there are two lines. First line has the number A, and the second line has the number B.
Both A and B will have same number of digits, which is no larger than 106, and without leading zeros.
5958
3036
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <algorithm>
#define LL long long
using namespace std;
const int N = ;
char str1[N],str2[N];
int num1[],num2[];
int res[N];
int main()
{
int tcase,t = ;
scanf("%d",&tcase);
while(tcase--)
{ scanf("%s%s",str1,str2);
if(strcmp(str1,"")==){
printf("Case #%d: ",t++);
printf("%s\n",str2);
continue;
}
if(strcmp(str2,"")==){
printf("Case #%d: ",t++);
printf("%s\n",str1);
continue;
}
int len = strlen(str1);
memset(num1,,sizeof(num1));
memset(num2,,sizeof(num2));
for(int i=; i<len; i++)
{
num1[str1[i]-'']++;
num2[str2[i]-'']++;
}
int high = -,x,y;
for(int i=; i<=; i++)
{
for(int j=; j<=; j++)
{
if(num1[i]&&num2[j]&&high<(i+j)%)
{
x = i;
y = j;
high = (i+j)%;
}
}
}
num1[x]--;
num2[y]--;
int cnt = ,zero = ;
res[cnt++] = high;
if(high==) zero++;
printf("Case #%d: ",t++);
if(zero){
printf("0\n");
continue;
}
for(int l=; l<len; l++)
{
/*
TLE
for(int i=0; i<=9; i++)
{
for(int j=0; j<=9; j++)
{
if(num1[i]&&num2[j]&&MAX<(i+j)%10)
{
x = i;
y = j;
MAX = (i+j)%10;
}
}
}*/
bool flag = true;
for(int i=;i>=&&flag;i--){
for(int j=;j<=&&flag;j++){
if(i-j<&&num1[j]&&num2[i-j+]){
num1[j]--;
num2[i-j+]--;
res[cnt++] = i;
flag = false;
}else if(i-j>=&&num1[j]&&num2[i-j]){
num1[j]--;
num2[i-j]--;
res[cnt++] = i;
flag = false;
}
}
} }
for(int i=;i<cnt;i++){
printf("%d",res[i]);
}
printf("\n");
}
return ;
}
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