ABC001 / C++11

A.cpp

 #include <iostream>
 using namespace std;

int main() {
	int h1, h2;
	cin >> h1;
	cin >> h2;
	cout << h1 - h2 << "\n";
	return 0;
}

B.cpp

 #include <iostream>
 #include <iomanip>
 using namespace std;

int main() {
	double m;
	cin >> m;
	m = m / 1000;
	int vv;
	if (m < 0.1)
		vv = 0;
	else if (m <= 5)
		vv = m * 10;
	else if (6 <= m && m <= 30)
		vv = m + 50;
	else if (35 <= m && m <= 70)
		vv = (m - 30) / 5 + 80;
	else if (70 <= m)
		vv = 89;
	cout << setfill('0') << setw(2) << vv << "\n";

	return 0;
}

C.cpp

#include <cstdio>
#include <math.h>
#include <vector>
#include <iostream>
#include <sstream>
#include <string>
#include <iomanip>

using namespace std;

int solveW(int Dis) {
	double x = Dis / 60.0 + 0.05 + 1e-5;
	x *= 10;
	x = floor(x);
	x = x / 10.0;

	if (x <= 0.2)
		return 0;
	else if (x <= 1.5)
		return 1;
	else if (x <= 3.3)
		return 2;
	else if (x <= 5.4)
		return 3;
	else if (x <= 7.9)
		return 4;
	else if (x <= 10.7)
		return 5;
	else if (x <= 13.8)
		return 6;
	else if (x <= 17.1)
		return 7;
	else if (x <= 20.7)
		return 8;
	else if (x <= 24.4)
		return 9;
	else if (x <= 28.4)
		return 10;
	else if (x <= 32.6)
		return 11;
	else if (x >= 32.7)
		return 12;
}

string solveDir(int Deg) {
	if (Deg <  112.5)
		return "N";
	else if (Deg <  337.5)
		return "NNE";
	else if (Deg <  562.5)
		return "NE";
	else if (Deg <  787.5)
		return "ENE";
	else if (Deg < 1012.5)
		return "E";
	else if (Deg < 1237.5)
		return "ESE";
	else if (Deg < 1462.5)
		return "SE";
	else if (Deg < 1687.5)
		return "SSE";
	else if (Deg < 1912.5)
		return "S";
	else if (Deg < 2137.5)
		return "SSW";
	else if (Deg < 2362.5)
		return "SW";
	else if (Deg < 2587.5)
		return "WSW";
	else if (Deg < 2812.5)
		return "W";
	else if (Deg < 3037.5)
		return "WNW";
	else if (Deg < 3262.5)
		return "NW";
	else if (Deg < 3487.5)
		return "NNW";
	else
		return "N";
}

int main() {
	int Deg, // 風向(角度を10倍)
		Dis; // 風程(m)
	cin >> Deg >> Dis;
	string Dir = solveDir(Deg);
	int W = solveW(Dis);
	if (W == 0) {
		cout << "C " << W << "\n";
	}
	else {
		cout << Dir << " " << W << "\n";
	}

	return 0;
}

D.cpp

#include <cstdio>
#include <math.h>
#include <vector>
#include <iostream>
#include <sstream>
#include <string>
#include <iomanip>

using namespace std;

string toHM(int v)
{
	double H = floor(v / 12.0);
	double M = ((v * 5) - H * 60);
	stringstream str;
	str << setw(4) << setfill('0') << H * 100 + M;
	return str.str();
}

int main() {
	int N = 0, s = 0, e = 0;
	char c; // "-"読み飛ばし用
	cin >> N;

	int arr[290] = { 0 };
	for (int i = 0; i < N; i++) {
		cin >> s >> c >> e;
		s = (s / 100) * 60 + (s % 100);
		e = (e / 100) * 60 + (e % 100);
		s = floor(s / 5.0);
		e = floor((e - 1) / 5.0);

		for (int j = s; j <= e; j++) {
			arr[j + 1] = 1;
		}
	}

	for (int i = 0; i < 289; i++) {
		if (arr[i] == 0 && arr[i + 1] == 1)
		{
			cout << toHM(i) << "-";
		}
		if (arr[i] == 1 && arr[i + 1] == 0)
		{
			cout << toHM(i) << "\n";
		}
	}

	return 0;
}