World Cup group stage: Difference between revisions
→{{header|C sharp|C#}}
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<small>''Hint: there should be no possible way to end up in second place with less than two points as well as no way to end up in first with less than three. Oddly enough, there is no way to get 8 points at all.''</small>
=={{header|C++}}==
{{trans|Go}}
<lang cpp>#include <algorithm>
#include <array>
#include <iomanip>
#include <iostream>
#include <sstream>
std::array<std::string, 6> games{ "12", "13", "14", "23", "24", "34" };
std::string results = "000000";
int fromBase3(std::string num) {
int out = 0;
for (auto c : num) {
int d = c - '0';
out = 3 * out + d;
}
return out;
}
std::string toBase3(int num) {
std::stringstream ss;
while (num > 0) {
int rem = num % 3;
num /= 3;
ss << rem;
}
auto str = ss.str();
std::reverse(str.begin(), str.end());
return str;
}
bool nextResult() {
if (results == "222222") {
return false;
}
auto res = fromBase3(results);
std::stringstream ss;
ss << std::setw(6) << std::setfill('0') << toBase3(res + 1);
results = ss.str();
return true;
}
int main() {
std::array<std::array<int, 10>, 4> points;
for (auto &row : points) {
std::fill(row.begin(), row.end(), 0);
}
do {
std::array<int, 4> records {0, 0, 0, 0 };
for (size_t i = 0; i < games.size(); i++) {
switch (results[i]) {
case '2':
records[games[i][0] - '1'] += 3;
break;
case '1':
records[games[i][0] - '1']++;
records[games[i][1] - '1']++;
break;
case '0':
records[games[i][1] - '1'] += 3;
break;
default:
break;
}
}
std::sort(records.begin(), records.end());
for (size_t i = 0; i < records.size(); i++) {
points[i][records[i]]++;
}
} while (nextResult());
std::cout << "POINTS 0 1 2 3 4 5 6 7 8 9\n";
std::cout << "-------------------------------------------------------------\n";
std::array<std::string, 4> places{ "1st", "2nd", "3rd", "4th" };
for (size_t i = 0; i < places.size(); i++) {
std::cout << places[i] << " place";
for (size_t j = 0; j < points[i].size(); j++) {
std::cout << std::setw(5) << points[3 - i][j];
}
std::cout << '\n';
}
return 0;
}</lang>
{{out}}
<pre>POINTS 0 1 2 3 4 5 6 7 8 9
-------------------------------------------------------------
1st place 0 0 0 1 14 148 152 306 0 108
2nd place 0 0 4 33 338 172 164 18 0 0
3rd place 0 18 136 273 290 4 8 0 0 0
4th place 108 306 184 125 6 0 0 0 0 0</pre>
=={{header|C sharp|C#}}==
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