Submission #30084645

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Source Code Expand

// #include <atcoder/all>
// using namespace atcoder;
// using mint = modint998244353;
// using mint = modint1000000007;
#include <bits/stdc++.h>
#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define rep2(i,k,n) for (int i = (k); i < (n); ++i)
using namespace std;
using ll = long long;
// using P = pair<ll,ll>;
using P = pair<int,int>;
using vint = vector<int>;
using vll = vector<ll>;
using vvint = vector<vector<int>>;
using vvll = vector<vector<ll>>;

// const ll INF = (ll)2e18+9;
const int INF = (int)2e9+7;
// const ll MOD = (ll)1e9+9;
template<typename T>
void chmin(T &a, T b) { a = min(a, b); }
template<typename T>
void chmax(T &a, T b) { a = max(a, b); }

template<typename T>
void print(vector<T> v) {
    int n = v.size();
    rep(i,n) {
        if (i == 0) cout << v[i];
        else cout << ' ' << v[i];
    }
    cout << endl;
}

string to_bin(ll n) {
    string s = "";
    while (n) {
        s.push_back('0' + (n % 2));
        n /= 2;
    }
    reverse(all(s));

    return s;
}

ll to_num(string s) {
    reverse(all(s));
    ll ans = 0;
    rep(i,s.size()) {
        ans += ll(s[i] - '0') << i;
    }

    return ans;
}

void solve() {
    ll n, x;
    cin >> n >> x;
    string s;
    cin >> s;

    string num = to_bin(x);

    for (char c : s) {
        if (c == 'U') num.pop_back();
        if (c == 'L') num.push_back('0');
        if (c == 'R') num.push_back('1');
    }

    cout << to_num(num) << endl;
}

int main() {
    solve();
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘ll to_num(std::string)’:
./Main.cpp:8:36: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
    8 | #define rep(i,n) for (int i = 0; i < (n); ++i)
      |                                    ^
./Main.cpp:51:5: note: in expansion of macro ‘rep’
   51 |     rep(i,s.size()) {
      |     ^~~

Judge Result