Submission #1043171

#	Time	Username	Problem	Language	Result	Execution time	Memory
1043171		Marco_Escandon	Prisoner Challenge (IOI22_prison)	C++17	Compilation error	0 ms	0 KiB

prison

#include<bits/stdc++.h>
using namespace std;
//#include "prison.h"
typedef int ll;
vector<vector<ll>> s;
ll cad[]={ 3, 3, 3, 3, 3, 2, 2, 1, 2};
ll P[20][5588]={ };
void sol(ll p,ll a, ll b)
{
    if(a>=b) return;
    P[p][a]=-1e9;
    P[p][b]=1e9;
    if(a+1==b) return;
    ll t1=(b-a-1)/cad[p];
    ll t2=(b-a-1)%cad[p];
    ll c=0;
    for(int i=a+1; i<b;c++)
    {
        for(int j=0;j<t1+t2; j++)
        {
            P[p][i+j]=c;
        }
        sol(p+1,i,i+t1+t2-1);
        i=i+t1+t2;
        t2--;t2=max(t2,0);
    }
}
ll Hash(ll p, ll vp) { return vp*9+p; }
std::vector<std::vector<int>> devise_strategy(int n) {
    sol(0,1,5588);
    s.assign(20,vector<ll>(n+1,0));
    s[0][0]=0;s[0][1]=-1;s[0][n]=-2;
    for(int i=2; i<n; i++)
        s[0][i]=Hash(1,P[0][i]);
    for(int i=1; i<20; i++)
    {
        ll temp=i;
        ll va=temp%9;
        temp/=9;
        swap(va,temp);
        s[i][0]=max((temp%2),0);
        temp--;
        for(int j=1; j<=n; j++)
        {
            ll vp=P[temp][j];
            if(va==vp)s[i][j]=Hash(temp+2,P[temp+1][j]);
            else if((s[i][0]==0&&vp<va)||(s[i][0]==1&&vp>va)) s[i][j]=-1;
            else s[i][j]=-2;
            if(s[i][j]>=20) s[i][j]=-2+s[i][0];
            if(s[i][j]<-1e7) s[i][j]=-1-s[i][0];
        }
    }
    /*for(int i=2; i<20; i++)
    {
        cout<<s[i][0]<<"      ";
        for(int j=1; j<=3; j++)
        {
            cout<<s[i][j]<<P[i/2-1][j]<<" ";
        }
        cout<<"\n";
    }*/
    return s;
}




#include <cassert>
#include <cstdio>

#include <string>
#include <vector>

static constexpr int kNumPrisoners = 500;

static void invalid_strategy(std::string message) {
  printf("%s\n", message.c_str());
  exit(0);
}

int main() {
  int N;
  assert(1 == scanf("%d", &N));

  std::vector<std::vector<int>> strategy = devise_strategy(N);
  if (strategy.size() == 0) {
    invalid_strategy("s is an empty array");
  }
  int x = strategy.size() - 1;
  for (int i = 0; i <= x; ++i) {
    if (static_cast<int>(strategy[i].size()) != N + 1) {
      invalid_strategy("s[i] contains incorrect length");
    }
    if (strategy[i][0] < 0 || strategy[i][0] > 1) {
      invalid_strategy("First element of s[i] is non-binary"); 
    }
    for (int j = 1; j <= N; ++j) {
      if (strategy[i][j] < -2 || strategy[i][j] > x) {
        invalid_strategy("s[i][j] contains incorrect value");
      }
    }
  }

  int A, B;
  while (1 == scanf("%d", &A) && A != -1) {
    assert(1 == scanf("%d", &B));
    bool answer = false;
    int whiteboard = 0;
    for (int i = 0; i < kNumPrisoners && !answer; ++i) {
      int check = strategy[whiteboard][0];
      whiteboard = strategy[whiteboard][check == 0 ? A : B];
      if (whiteboard < 0) {
        answer = true;
        printf("%c\n", "BA"[whiteboard + 2]);
      } else {
        if (i > 0) {
          printf(" ");
        }
        printf("%d", whiteboard);
      }
    }
    if (!answer) {
      printf("X\n");
    }
    printf("\n");
  }
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cchSGAtN.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccVMDuLM.o:prison.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status