Submission #926988

#	Time	Username	Problem	Language	Result	Execution time	Memory
926988		blacktulip	Table Tennis (info1cup20_tabletennis)	C++17	Compilation error	0 ms	0 KiB

tabletennis

#include <bits/stdc++.h>

using namespace std;

#define ort ((bas+son)/2)
#define int long long
#define endl "\n"

int n,k,a[150005],index;

inline bool check(int l,int r,int sum){
	int say=0;
	while(l<r){
		if(a[l]+a[r]==sum){
			l++;
			r--;
			say++;
		}
		else if(a[l]+a[r]<sum){
			index=l;
			l++;
		}
		else{
			index=r;
			r--;
		}
	}
	if(say==n/2)return 1;
	return 0;
}

int32_t main(void){
	ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
	cin>>n>>k;
	for(int i=1;i<=n;i++)cin>>a[i];
	if(check(1,n,a[1]+a[n])){
		for(int i=1;i<index;i++)cout<<i<<" ";
		for(int i=index+1;i<=n;i++)cout<<i<<" ";
		return 0;
	}
	if(check(1,n-1,a[1]+a[n-1])){
		for(int i=1;i<n;i++)cout<<i<<" ";
		return 0;
	}
	if(check(2,n,a[2]+a[n])){
		for(int i=2;i<=n;i++)cout<<i<<" ";
		return 0;
	}
	return 0;
}

Compilation message (stderr)

tabletennis.cpp:9:19: error: 'long long int index' redeclared as different kind of entity
    9 | int n,k,a[150005],index;
      |                   ^~~~~
In file included from /usr/include/string.h:432,
                 from /usr/include/c++/10/cstring:42,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:48,
                 from tabletennis.cpp:1:
/usr/include/strings.h:61:1: note: previous declaration 'const char* index(const char*, int)'
   61 | index (const char *__s, int __c) __THROW
      | ^~~~~
tabletennis.cpp: In function 'bool check(long long int, long long int, long long int)':
tabletennis.cpp:20:10: error: overloaded function with no contextual type information
   20 |    index=l;
      |          ^
tabletennis.cpp:24:10: error: overloaded function with no contextual type information
   24 |    index=r;
      |          ^
tabletennis.cpp: In function 'int32_t main()':
tabletennis.cpp:37:16: error: invalid operands of types 'long long int' and '<unresolved overloaded function type>' to binary 'operator<'
   37 |   for(int i=1;i<index;i++)cout<<i<<" ";
      |               ~^~~~~~
tabletennis.cpp:38:18: error: invalid operands of types '<unresolved overloaded function type>' and 'int' to binary 'operator+'
   38 |   for(int i=index+1;i<=n;i++)cout<<i<<" ";
      |             ~~~~~^~