Problem:
Score : 100 points

Problem Statement

Given is a string S representing the day of the week today.

S is SUN, MON, TUE, WED, THU, FRI, or SAT, for Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday, respectively.

After how many days is the next Sunday (tomorrow or later)?

Constraints

S is SUN, MON, TUE, WED, THU, FRI, or SAT.

Input

Input is given from Standard Input in the following format:

S

Output

Print the number of days before the next Sunday.

Sample Input 1

SAT

Sample Output 1

1

It is Saturday today, and tomorrow will be Sunday.

Sample Input 2

SUN

Sample Output 2

7

It is Sunday today, and seven days later, it will be Sunday again.

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

#define NEW(p,n){p=malloc((n)*sizeof(p[0]));if(p==NULL){printf("not enough memory\n");exit(1);};}
//pの型の変数n個の要素分のメモリを確保し、そのアドレスをpに代入するマクロ

#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define SWAP(type, x, y) do { type tmp = x; x = y; y = tmp; } while (0)

#define MOD 1000000007 

typedef struct{
    int priority;
    double value;
}data;

//昇順
int asc(const void* a, const void* b){
    return *(int*)a-*(int*)b;
}

//降順
int desc(const void* a, const void* b){
    return *(int*)b-*(int*)a;
}

int main(void){
    char S[4];
    scanf("%s",S);

    if(S[0]=='S'){
        if(S[1]=='U') printf("7\n");
        else printf("1\n");
    }
    else if(S[0]=='M') printf("6\n");
    else if(S[0]=='T'){
        if(S[1]=='U') printf("5\n");
        else printf("3\n");
    }
    else if(S[0]=='W') printf("4\n");
    else printf("2\n");

    return 0;
}