Forgotten measurements

#include <bits/stdc++.h>

using namespace std;

#define rep(i, a, b) for (int i = (a); i < (b); i++)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;

int main() {
	cin.tie(0)->sync_with_stdio(0);
	cin.exceptions(cin.failbit);
	string s;
	cin >> s;
	vector<int> ys, xs;
	for (char c : s) {
		if (c == 'U' || c == 'D') ys.push_back(c == 'U');
		if (c == 'L' || c == 'R') xs.push_back(c == 'L');
	}
	auto solve = [&](vector<int> x) {
		int n = (int)x.size();
		int c = 0;
		for (int y : x) c += y;
		return min(c, n - c);
	};
	cout << solve(xs) + solve(ys) << endl;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED