Submission #1168758

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1168758	2025-03-18 01:54:25	rayan_bd	Sequence (APIO23_sequence)	C++20	Compilation error	0 ms	0 KiB

sequence

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#include <bits/stdc++.h>
using namespace std;
const double INF = 5e18;
const int mxN = 5e5+100;
#define fi first
#define se second
#define all(v) v.begin(), v.end()
int sequence(int N,vector<int> A){
  map<int,pair<int,int>> mp;
  map<int,int> frq;
  for(int i=0;i<N;++i){
    if(!mp.count(A[i])) mp[A[i]].fi=i;
    mp[A[i]].se=i;
    ++frq[A[i]];
  }
  int cnt=1,ans=1;
  for(int i=1;i<N;++i){
    if(A[i]==A[i-1]) ans=max(ans,++cnt);
    else cnt=1;
  }
  for(auto it:mp){
    int len=it.se.se-it.se.fi+1;
    if(len&1){
      if(frq[it.fi]>=((len+1)/2)) ans=max(ans,frq[it.fi]);
    }else{
      if(frq[it.fi]>=(len/2)) ans=max(ans,frq[it.fi]);
    }
 
 
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Compilation message (stderr)

sequence.cpp: In function 'int main()':
sequence.cpp:36:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         freopen("input.in","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
sequence.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen("output.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccxXvujy.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccgOoHOF.o:sequence.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status