PAT (Advanced Level) 1100. Mars Numbers (20)

#include<cstdio>
#include<cstring>
#include<cmath>
#include<vector>
#include<map>
#include<queue>
#include<stack>
#include<algorithm>
using namespace std;

char a[20][6]={
"tret","jan", "feb", "mar", "apr", "may", "jun", "jly", "aug", "sep", "oct", "nov", "dec"
};

char b[20][6]={
"zzz","tam", "hel", "maa", "huh", "tou", "kes", "hei", "elo", "syy", "lok", "mer", "jou"
};

int main()
{
int n; char s[10000];
scanf("%d",&n); getchar();
for(int i=1;i<=n;i++)
{
gets(s);
if(s[0]>='0'&&s[0]<='9')
{
int num=0;
for(int i=0;s[i];i++) num=num*10+s[i]-'0';
if(num<=12) printf("%s\n",a[num]);
else if(num%13==0) printf("%s\n",b[num/13]);
else printf("%s %s\n",b[num/13],a[num%13]);
}
else
{
int p=-1;
for(int i=0;s[i];i++) if(s[i]==' ') p=i;
if(p==-1)
{
int num=0;
for(int i=0;i<=12;i++)
if(strcmp(a[i],s)==0) num=i;
for(int i=1;i<=12;i++)
if(strcmp(b[i],s)==0) num=13*i;
printf("%d\n",num);
}
else
{
int num=0;
char op[10]; int sz=0;
for(int i=0;i<p;i++) op[sz++]=s[i]; op[sz]=0;
for(int i=1;i<=12;i++)
if(strcmp(b[i],op)==0) num=13*i;
sz=0;
for(int i=p+1;s[i];i++) op[sz++]=s[i]; op[sz]=0;
for(int i=0;i<=12;i++)
if(strcmp(a[i],op)==0) num+=i;
printf("%d\n",num);
}
}
}
return 0;
}