Submission #463535

#	Time	Username	Problem	Language	Result	Execution time	Memory
463535		kilikuma	Exam (eJOI20_exam)	C++14	0 / 100	1090 ms	716 KiB

exam

#include <bits/stdc++.h> 
using namespace std;
int nbEleves; 
int maxi = 0;   int A[100000+42]; int etat[100000+42]; int B[100000+42]; 
int C[100000+42]; 
void recur(int N) {
  if (N == nbEleves+1) {
    for (int i=1;i<=nbEleves;i++) C[i] = A[i]; 
    int objectif = 0; 
    for (int i=1;i<=nbEleves; i++) {
      if (etat[i]) objectif ++; 
    }
    bool cond =true; 
    for (int i=1; i<= nbEleves;i++) {
      if (etat[i]) {
        // if(objectif==4) cout << i << endl; 
        int maxiCur = 0; 
        bool cond1 = false; 
        for (int j=i; j<=nbEleves; j++) {
          maxiCur = max(maxiCur, C[j]); 
          if (maxiCur == B[i]) {
            cond1 = true; 
            for (int z = i; z <= j; z ++) {
              C[i] = B[i]; 
            }
        //   if(etat[1] && etat[2] && etat[4]) cout << i << " " << j << endl; 
            break; 
           
          }
          
        }
        if (!cond1) {
          maxiCur = C[i]; 
          for (int j=i-1; j>=1 && (!etat[j]) ; j--) {
            maxiCur = max(maxiCur, C[j]); 
            if (maxiCur == B[i]) {
              cond1 = true; 
              for (int z = j; z >= i; z --) {
                C[i] = B[i]; 
              }
             // if(etat[1] && etat[2] && etat[4]) 
           //     cout << i << " " << j << endl; 
              break; 
            }
          }
        }
        if (!cond1) {
          cond = false; 
        }
      }
    }
    if (cond) {
    /*   if(objectif==4) {
      
      for (int i=1;i<=nbEleves; i++) {
      cout << etat[i] << endl; 
    }
    } */ 
      maxi = max(maxi, objectif); 
    }
    
  }
  else {
    etat[N] = false; 
    recur(N+1); 
    etat[N] = true; 
    recur(N+1); 
    etat[N] = false; 
  }
}
int main() {
  scanf("%d",&nbEleves); 

  for (int i = 1; i<= nbEleves; i++) {
    scanf("%d",&A[i]); 
  }
  for (int i=1;i<=nbEleves; i++) {
    scanf("%d",&B[i]); 
  }
  for (int i=1;i<=nbEleves; i++) {
    etat[i] = false; 
  }
  recur(1); 
  printf("%d\n", maxi); 
}

Compilation message (stderr)

exam.cpp: In function 'int main()':
exam.cpp:72:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |   scanf("%d",&nbEleves);
      |   ~~~~~^~~~~~~~~~~~~~~~
exam.cpp:75:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   75 |     scanf("%d",&A[i]);
      |     ~~~~~^~~~~~~~~~~~
exam.cpp:78:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   78 |     scanf("%d",&B[i]);
      |     ~~~~~^~~~~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 23
• Subtask 5: 0 / 16
• Subtask 6: 0 / 22