CodeForces 260B Ancient Prophesy 模拟

给出字符串找出符合"dd-mm-yyyy"格式的2013~2015年的出现次数最多的日期。

一开始写成1~len-10怒跪。。。

只要每位试一下就好了。

#include <cstdio>#include <cctype>#include <cstring>char str[100005];int month[]={0,31,28,31,30,31,30,31,31,30,31,30,31};int cnt[4][16][32];int main() {int d = -1, m = -1, y = -1, id, ansd = 0;scanf("%s", str);int len=strlen(str);for(int i=0;i<len-9;i++) {if(isdigit(str[i])&&isdigit(str[i+1])&&isdigit(str[i+3])&&isdigit(str[i+4])&&isdigit(str[i+6])&&isdigit(str[i+7])&&isdigit(str[i+8])&&isdigit(str[i+9])&&str[i+2]=='-'&&str[i+5]=='-') {d=(str[i+0]-48)*10+str[i+1]-48;m=(str[i+3]-48)*10+str[i+4]-48;y=(((str[i+6]-48)*10+str[i+7]-48)*10+str[i+8]-48)*10+str[i+9]-48;if(m>12||y<2013||y>2015||m<1)continue;if(d>month[m]||d<1)continue;if(++cnt[y-2013][m][d]>ansd)ansd=cnt[y-2013][m][d],id=i;}}for(int i=0;i<10;i++)putchar(str[id+i]);return 0;}

B. Ancient Prophesy

time limit per test

1 second

memory limit per test

256 megabytes

input

standard input

output

standard output

A recently found Ancient Prophesy is believed to contain the exact Apocalypse date. The prophesy is a string that only consists of digits and characters "-".

We'll say that some date is mentioned in the Prophesy if there is a substring in the Prophesy that is the date's record in the format "dd-mm-yyyy". We'll say that the number of the date's occurrences is the number of such substrings in the Prophesy. For example, the Prophesy "0012-10-2012-10-2012" mentions date 12-10-2012 twice (first time as "0012-10-2012-10-2012", second time as "0012-10-2012-10-2012").

The date of the Apocalypse is such correct date that the number of times it is mentioned in the Prophesy is strictly larger than that of any other correct date.

A date is correct if the year lies in the range from 2013 to 2015, the month is from 1 to 12, and the number of the day is strictly more than a zero and doesn't exceed the number of days in the current month. Note that a date is written in the format "dd-mm-yyyy", that means that leading zeroes may be added to the numbers of the months or days if needed. In other words, date "1-1-2013" isn't recorded in the format "dd-mm-yyyy", and date "01-01-2013" is recorded in it.

Notice, that any year between 2013 and 2015 is not a leap year.

Input

The first line contains the Prophesy: a non-empty string that only consists of digits and characters "-". The length of the Prophesy doesn't exceed 105 characters.

Output

In a single line print the date of the Apocalypse. It is guaranteed that such date exists and is unique.

Sample test(s)

input

777-444---21-12-2013-12-2013-12-2013---444-777

output

13-12-2013