Submission #849356

#TimeUsernameProblemLanguageResultExecution timeMemory
849356vjudge1Art Collections (BOI22_art)C++17
35 / 100
156 ms63400 KiB
#include <bits/stdc++.h>
#define all(v) ((v).begin(),(v).end())
#define ll long long
#define F first
#define S second
const ll mod = 1e9 + 7;
const ll mxN = 1e5 + 2;
using namespace std;
// void __attribute__((noreturn)) __attribute__((format(printf, 1, 2))) result(const char *msg, ...) {
//   va_list args;
//   va_start(args, msg);
//   vfprintf(stdout, msg, args);
//   fprintf(stdout, "\n");
//   va_end(args);
//   exit(0);
// }
// 
// namespace {
//   int N;
//   int Q = 0;
//   const int MAX_Q = 4000;
//   const int MAX_N = 4000;
//   vector<int> solution;
// }  // namespace
// 
// 
// void __attribute__((noreturn)) answer(vector<int> R) {
//   printf("answer({");
//   for(int i = 0; i < int(R.size()); ++i) {
//     if(i == 0)
//     printf("%d", R[i]);
//     else
//     printf(", %d", R[i]);
//   }
//   printf("})\n");
//   fflush(stdout);
// 
// 
//   if(R == solution)
//   result("Correct: %d published ranking(s).", Q);
//   else
//   result("Wrong answer!");
// }

int publish(vector<int> R);
  // printf("publish({");
  // for(int i = 0; i < int(R.size()); ++i) {
  //   if(i == 0)
  //   printf("%d", R[i]);
  //   else
  //   printf(", %d", R[i]);
  // }
  // printf("})\n");
  // fflush(stdout);
// 
//   if (++Q > MAX_Q)
//   result("Too many published rankings!");
// 
//   if (int(R.size()) != N)
//   result("Invalid published ranking!");
// 
//   set<int> chosen;
//   for(auto &x : R) {
//     if(x < 1 || x > N || chosen.count(x))
//     result("Invalid published ranking!");
//     chosen.insert(x);
//   }
//   vector<int> positions(N+1);
//   for(int i = 0; i < N; ++i)
//   positions[R[i]] = i;
// 
//   int complaints = 0;
//   for(int i = 0; i < N; ++i) {
//     for(int j = i+1; j < N; ++j) {
//       if(positions[solution[i]] > positions[solution[j]])
//       ++complaints;
//     }
//   }
// 
//   return complaints;
// }

void answer(std::vector<int>);
int comp[4002][4002];
bool compare(int a,int b,int N){
  if(comp[a][b] != -1) return comp[a][b];
  vector<int> ch1,ch2;
  ch2.push_back(b);
  ch2.push_back(a);
  ch1.push_back(a);
  ch1.push_back(b);
  for(int i = 1;i <= N;i++){
    if(i != a && i != b){
      ch1.push_back(i);
      ch2.push_back(i);
    }
  }

  return comp[a][b] = (publish(ch1) < publish(ch2));
}
vector<int>og;
vector<int>mergeSort(int l,int r,int N){
  if(l == r) return og;
  int md = (l + r) / 2;
  vector<int> a = mergeSort(l,md,N);
  vector<int> b = mergeSort(md + 1,r,N);
  vector<int> c;
  for(int i = 0;i < l;i++){
    c.push_back(i + 1);
  }
  int j = md + 1;
  int i = l;
  while(i <= md || j <= r){
    if(j > r){
      c.push_back(a[i]);
      i++;
    }
    else if(i > md){
      c.push_back(b[j]);
      j++;
    }
    else if(compare(a[i],b[j],N)){
      c.push_back(a[i]);
      i++;
    }else{
      c.push_back(b[j]);
      j++;
    }
  }
  for(int i = r;i < N - 1;i++){
    c.push_back(i + 1);
  }
  // cout<<l<<' '<<r<<'\n';
  // for(auto x : c) cout<<x<<' ';
  // cout<<'\n';
  return c;
}

void solve(int N) {
    memset(comp,-1,sizeof comp);
    for(int i = 1;i <= N;i++) og.push_back(i);
    answer(mergeSort(0,N - 1,N));
}

// 
// int main() {
//     if (scanf("%d", &N) != 1 || N < 2 || N > MAX_N)
//         result("Invalid input!");
// 
//     solution.resize(N);
//     set<int> chosen;
//     for(auto &x : solution) {
//         if(scanf("%d", &x) != 1 || x < 1 || x > N || chosen.count(x))
//             result("Invalid input!");
//         chosen.insert(x);
//     }
// 
//     solve(N);
// 
//     result("No answer!");
// }

Compilation message (stderr)

art.cpp: In function 'bool compare(int, int, int)':
art.cpp:99:21: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   99 |   return comp[a][b] = (publish(ch1) < publish(ch2));
      |          ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
interface.cpp: In function 'int publish(std::vector<int>)':
interface.cpp:20:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   20 |     if(v.size() != N) {
      |        ~~~~~~~~~^~~~
interface.cpp: In function 'void answer(std::vector<int>)':
interface.cpp:36:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   36 |     if(v.size() != N) {
      |        ~~~~~~~~~^~~~
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