Submission #595134

#	Time	Username	Problem	Language	Result	Execution time	Memory
595134		thezomb1e	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

#define eb emplace_back
#define pb push_back
#define ft first
#define sd second
#define pi pair<int, int>
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define dbg(...) dbg_out(__VA_ARGS__)

using ll = long long;
using ld = long double;
using namespace std;
using namespace __gnu_pbds;

//Constants
const ll INF = 5 * 1e18;
const int IINF = 2 * 1e9;
const ll MOD = 1e9 + 7;
// const ll MOD = 998244353;
const ll dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
const ld PI = 3.14159265359;

//Templates
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) {return os << '(' << p.first << ", " << p.second << ')';}
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) {os << '['; string sep; for (const T &x : v) os << sep << x, sep = ", "; return os << ']';}
void dbg_out() {cerr << endl;}
template<typename Head, typename... Tail> void dbg_out(Head H, Tail... T) { cerr << H << ' '; dbg_out(T...); }
template<typename T> void mins(T& x, T y) {x = min(x, y);}
template<typename T> void maxs(T& x, T y) {x = max(x, y);}
template<typename T> using oset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T> using omset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;

const string ABC = "ABXY";
string nABC;

string guess_sequence(int n) {
    string ans;
    int skip;
    {
        string cur;
        for (int i = 0; i < 4; i++) {
            cur += ABC[i];
        }
        if (press(cur.substr(0, 2))) {
            if (press(cur.substr(0, 1))) {
                skip = 0;
            } else {
                skip = 1;
            }
        } else {
            if (press(cur.substr(2, 1))) {
                skip = 2;
            } else {
                skip = 3;
            }
        }
        ans.pb(ABC[skip]);
    }
    for (int i = 0; i < 4; i++) {
        if (i == skip) continue;
        nABC.pb(ABC[i]);
    }
    for (int it = 1; it < n - 1; it++) {
        string cur;
        for (int i = 0; i < 3; i++) {
            cur += ans;
            cur += nABC[0];
            cur += nABC[i];
        }
        cur += ans;
        cur += nABC[1];
        int val = press(cur);
        if (val == it) {
            ans.pb(nABC[2]);
        } else if (val == it + 1) {
            ans.pb(nABC[1]);
        } else {
            ans.pb(nABC[0]);
        }
    }
    string cur;
    for (int i = 0; i < 3; i++) {
        cur += ans; cur += nABC[i];
    }
    if (press(cur.substr(0, 2 * n)) == n) {
        if (press(cur.substr(0, n)) == n) {
            ans.pb(nABC[0]);
        } else {
            ans.pb(nABC[1]);
        }
    } else {
        ans.pb(nABC[2]);
    }
    return ans;
}

namespace {

constexpr int MAX_N = 2000;
constexpr int MAX_NUM_MOVES = 8000;

int N;
std::string S;

int num_moves;

void wrong_answer(const char *MSG) {
  printf("Wrong Answer: %s\n", MSG);
  exit(0);
}

}  // namespace

int press(std::string p) {
  if (++num_moves > MAX_NUM_MOVES) {
    wrong_answer("too many moves");
  }
  int len = p.length();
  if (len > 4 * N) {
    wrong_answer("invalid press");
  }
  for (int i = 0; i < len; ++i) {
    if (p[i] != 'A' && p[i] != 'B' && p[i] != 'X' && p[i] != 'Y') {
      wrong_answer("invalid press");
    }
  }
  int coins = 0;
  for (int i = 0, j = 0; i < len; ++i) {
    if (j < N && S[j] == p[i]) {
      ++j;
    } else if (S[0] == p[i]) {
      j = 1;
    } else {
      j = 0;
    }
    coins = std::max(coins, j);
  }
  return coins;
}

int main() {
  char buffer[MAX_N + 1];
  if (scanf("%s", buffer) != 1) {
    fprintf(stderr, "Error while reading input\n");
    exit(1);
  }
  S = buffer;
  N = S.length();

  num_moves = 0;
  std::string answer = guess_sequence(N);
  if (answer != S) {
    wrong_answer("wrong guess");
    exit(0);
  }
  printf("Accepted: %d\n", num_moves);
  return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccCU530H.o: in function `press(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)':
grader.cpp:(.text+0x0): multiple definition of `press(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'; /tmp/ccygHRLI.o:combo.cpp:(.text+0x170): first defined here
/usr/bin/ld: /tmp/ccCU530H.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccygHRLI.o:combo.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status