Submission #409390

#	Time	Username	Problem	Language	Result	Execution time	Memory
409390		MKopchev	Mechanical Doll (IOI18_doll)	C++14	47 / 100	184 ms	11976 KiB

doll

#include "doll.h"
#include<bits/stdc++.h>
using namespace std;
/*
namespace {

constexpr int P_MAX = 20000000;
constexpr int S_MAX = 400000;

int M, N;
std::vector<int> A;

bool answered;
int S;
std::vector<int> IC, IX, IY;

int read_int() {
  int x;
  if (scanf("%d", &x) != 1) {
    fprintf(stderr, "Error while reading input\n");
    exit(1);
  }
  return x;
}

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

void simulate() {
  if (S > S_MAX) {
    char str[50];
    sprintf(str, "over %d switches", S_MAX);
    wrong_answer(str);
  }
  for (int i = 0; i <= M; ++i) {
    if (!(-S <= IC[i] && IC[i] <= M)) {
      wrong_answer("wrong serial number");
    }
  }
  for (int j = 1; j <= S; ++j) {
    if (!(-S <= IX[j - 1] && IX[j - 1] <= M)) {
      wrong_answer("wrong serial number");
    }
    if (!(-S <= IY[j - 1] && IY[j - 1] <= M)) {
      wrong_answer("wrong serial number");
    }
  }

  int P = 0;
  std::vector<bool> state(S + 1, false);
  int pos = IC[0];
  int k = 0;
  FILE *file_log = fopen("log.txt", "w");
  fprintf(file_log, "0\n");
  for (;;) {
    fprintf(file_log, "%d\n", pos);
    if (pos < 0) {
      if (++P > P_MAX) {
        fclose(file_log);
        char str[50];
        sprintf(str, "over %d inversions", P_MAX);
        wrong_answer(str);
      }
      state[-pos] = !state[-pos];
      pos = state[-pos] ? IX[-(1 + pos)] : IY[-(1 + pos)];
    } else {
      if (pos == 0) {
        break;
      }
      if (k >= N) {
        fclose(file_log);
        wrong_answer("wrong motion");
      }
      if (pos != A[k++]) {
        fclose(file_log);
        wrong_answer("wrong motion");
      }
      pos = IC[pos];
    }
  }
  fclose(file_log);
  if (k != N) {
    wrong_answer("wrong motion");
  }
  for (int j = 1; j <= S; ++j) {
    if (state[j]) {
      wrong_answer("state 'Y'");
    }
  }
  printf("Accepted: %d %d\n", S, P);
}

}  // namespace

void answer(std::vector<int> C, std::vector<int> X, std::vector<int> Y) {
  if (answered) {
    wrong_answer("answered not exactly once");
  }
  answered = true;
  // check if input format is correct
  if ((int)C.size() != M + 1) {
    wrong_answer("wrong array length");
  }
  if (X.size() != Y.size()) {
    wrong_answer("wrong array length");
  }
  S = X.size();
  IC = C;
  IX = X;
  IY = Y;
}
*/
int n;

vector<int> type;

void create_circuit(int M, std::vector<int> A) {
  int N = A.size();
  std::vector<int> C(M + 1);
  C[0] = A[0];
  for (int i = 1; i <= M; ++i) {
    C[i] = -1;
  }
  A.erase(A.begin(),A.begin()+1);
  A.push_back(0);

  int on=2;

  while(on<A.size())on=on*2;

  while(A.size()<on)
  {
      A.pop_back();
      A.push_back(-1);
      A.push_back(0);
  }

  for(int i=0;i<=A.size();i++)type.push_back(0);

    n=on;

  std::vector<int> X(n), Y(n);

  for(int k=1;k<=on/2-1;k++)
  {
    X[k-1]=(-2*k);
    Y[k-1]=(-2*k-1);
  }

    for(auto w:A)
    {
        int cur=1;

        while(cur<on/2)
        {
            if(type[cur]==0)
            {
                type[cur]=!type[cur];
                cur=-X[cur-1];
            }
            else
            {
                type[cur]=!type[cur];
                cur=-Y[cur-1];
            }
        }

        if(type[cur]==0)X[cur-1]=w;
        else Y[cur-1]=w;

        type[cur]=!type[cur];
    }

  answer(C, X, Y);
}

/*
int main() {
  M = read_int();
  N = read_int();
  A.resize(N);
  for (int k = 0; k < N; ++k) {
    A[k] = read_int();
  }

  answered = false;
  create_circuit(M, A);
  if (!answered) {
    wrong_answer("answered not exactly once");
  }
  FILE *file_out = fopen("out.txt", "w");
  fprintf(file_out, "%d\n", S);
  for (int i = 0; i <= M; ++i) {
    fprintf(file_out, "%d\n", IC[i]);
  }
  for (int j = 1; j <= S; ++j) {
    fprintf(file_out, "%d %d\n", IX[j - 1], IY[j - 1]);
  }
  fclose(file_out);
  simulate();
  return 0;
}
*/

Compilation message (stderr)

doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:131:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  131 |   while(on<A.size())on=on*2;
      |         ~~^~~~~~~~~
doll.cpp:133:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  133 |   while(A.size()<on)
      |         ~~~~~~~~^~~
doll.cpp:140:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  140 |   for(int i=0;i<=A.size();i++)type.push_back(0);
      |               ~^~~~~~~~~~
doll.cpp:120:7: warning: unused variable 'N' [-Wunused-variable]
  120 |   int N = A.size();
      |       ^

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 10
• Subtask 4: 10 / 10
• Subtask 5: 9.0000000018 / 18
• Subtask 6: 28.0000000056 / 56