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++14 (GCC 5.4.1) (judge verdict: Wrong Answer)


#include <iostream>
#include <iomanip>
#include <vector>
#include <string>

#include <algorithm>
#include <numeric>
#include <cmath>

using namespace std;
typedef long long ll;
const long double PI = (acos(-1));
const long long MOD = 1000000007;
#define rep(i,n) REP(i,0,n)
#define REP(i,x,n) for(int i=x;i<n;++i)

///////////////////////////////////////////////////
// -------------------- I/O -------------------- //
///////////////////////////////////////////////////
// https://stackoverflow.com/questions/610245/where-and-why-do-i-have-to-put-the-template-and-typename-keywords
template<typename T> void outputVec(const std::vector<T>& vec, const int precision = 0) {
	if (precision > 0) std::cout << std::fixed << std::setprecision(precision);
	for (auto it = vec.begin(); it != vec.end() - 1; ++it) { std::cout << *it << " "; }
	std::cout << *(vec.end() - 1) << "\n";
}
template<typename T> void outputVal(const T& res, const int precision = 0) {
	if (precision > 0) std::cout << std::fixed << std::setprecision(precision);
	std::cout << res << "\n";
}
template<typename T> T inputVal() { T a; std::cin >> a; return a; }
template<typename T> std::vector<T> inputVec(int N) {
	std::vector<T> vec(N);
	for (auto it = vec.begin(); it != vec.end(); ++it) { std::cin >> *it; }
	return vec;
}
template<typename T> void inputVec(std::vector<T>& vec) {
	for (auto it = vec.begin(); it != vec.end(); ++it) { std::cin >> *it; }
}

///////////////////////////////////////////////////
// ------------------- utils ------------------- //
///////////////////////////////////////////////////
// change min/max
template<class T> inline bool chMin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
template<class T> inline bool chMax(T& a, T b) { if (a < b) { a = b; return true; } return false; }

///////////////////////////////////////////////////
// ------------------- main -------------------- //
///////////////////////////////////////////////////
void Main() {
	string S = inputVal<string>();
	int ret;

	if (S == "SUN") ret = 7;
	if (S == "SAT") ret = 1;
	if (S == "FRI") ret = 2;
	if (S == "THU") ret = 3;
	if (S == "WED") ret = 4;
	if (S == "TUE") ret = 5;
	if (S == "MON") ret = 5;


	outputVal(ret);
}

int main() {
	std::ios::sync_with_stdio(false);
	std::cin.tie(0);
	std::cout << std::fixed << std::setprecision(15);
	Main();

	double tmp;
	cin >> tmp;

	return 0;
}