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#include <algorithm>
#include <iostream>
#include <list>
#include <string>
#include <tuple>
#include <vector>
int main()
{
std::vector<std::pair<char, int>> steps;
while (1) {
std::string line;
std::getline(std::cin, line);
if (std::cin.eof())
break;
steps.emplace_back(line.front(), stoi(line.substr(2)));
}
int hx = 0, hy = 0, tx = 0, ty = 0;
std::list<std::pair<int, int>> locs;
locs.emplace_back(0, 0);
for (const auto& [dir, count] : steps) {
for (int i = 0; i < count; ++i) {
//std::cout << hx << ", " << hy << " " << tx << ", " << ty << std::endl;
if (dir == 'U')
++hy;
else if (dir == 'D')
--hy;
else if (dir == 'R')
++hx;
else if (dir == 'L')
--hx;
if (std::abs(hx - tx) > 1 || std::abs(hy - ty) > 1) {
if (hx != tx)
tx += hx > tx ? 1 : -1;
if (hy != ty)
ty += hy > ty ? 1 : -1;
if (std::find(locs.cbegin(), locs.cend(), std::pair{tx, ty}) == locs.cend()) {
locs.emplace_back(tx, ty);
}
}
}
}
std::cout << locs.size() << std::endl;
return 0;
}
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