C. Gourmet Cat
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output
Polycarp has a cat and his cat is a real gourmet! Dependent on a day of the week he eats certain type of food:
- on Mondays, Thursdays and Sundays he eats fish food;
- on Tuesdays and Saturdays he eats rabbit stew;
- on other days of week he eats chicken stake.
Polycarp plans to go on a trip and already packed his backpack. His backpack contains:
- a
- daily rations of fish food;
- b
- daily rations of rabbit stew;
- c
- daily rations of chicken stakes.
Polycarp has to choose such day of the week to start his trip that his cat can eat without additional food purchases as long as possible. Print the maximum number of days the cat can eat in a trip without additional food purchases, if Polycarp chooses the day of the week to start his trip optimally.
Input
The first line of the input contains three positive integers a
, b and c (1≤a,b,c≤7⋅108
) — the number of daily rations of fish food, rabbit stew and chicken stakes in Polycarps backpack correspondingly.
Output
Print the maximum number of days the cat can eat in a trip without additional food purchases, if Polycarp chooses the day of the week to start his trip optimally.
Examples
Input
Copy
2 1 1
Output
Copy
4
Input
Copy
3 2 2
Output
Copy
7
Input
Copy
1 100 1
Output
Copy
3
Input
Copy
30 20 10
Output
Copy
39
ac代码
By jswwsj, contest: Codeforces Round #552 (Div. 3), problem: (C) Gourmet Cat, Accepted, #
#include<stdio.h>
#include<algorithm>
#include<cstring>
using namespace std;
#define ll long long
int maxx=0;
void dfs(int day,int sum,int a,int b,int c)
{
if(a==-1||b==-1||c==-1||sum>7){
maxx=max(maxx,sum-1);
return;
}
if(day>7) day=1;
if(day==1||day==4||day==7)
{
//printf("day=%d sum=%d a=%d b=%d c=%d\n",day,sum,a,b,c);
dfs(day+1,sum+1,a-1,b,c);
}
else if(day==2||day==6)
{
//printf("day=%d sum=%d a=%d b=%d c=%d\n",day,sum,a,b,c);
dfs(day+1,sum+1,a,b-1,c);
}
else
{
//printf("day=%d sum=%d a=%d b=%d c=%d\n",day,sum,a,b,c);
dfs(day+1,sum+1,a,b,c-1);
}
}
int main()
{
int a,b,c;
while(scanf("%d %d %d",&a,&b,&c)!=EOF)
{
maxx=0;
int d[10]={0},sum=0;
d[1]=a/3;d[2]=b/2;d[3]=c/2;
sort(d+1,d+4);
sum+=7*d[1];
a-=d[1]*3;
b-=d[1]*2;
c-=d[1]*2;
// printf("sum=%d a=%d b=%d c=%d\n",sum,)
//dfs(7,1,a,b,c);
for(int i=1;i<=7;i++)
{
dfs(i,0,a,b,c);
}
printf("%d\n",sum+maxx);
}
}
