Submission #84504

#	Time	Username	Problem	Language	Result	Execution time	Memory
84504		Pajaraja	Election (BOI18_election)	C++17	Compilation error	0 ms	0 KiB

election

#include <bits/stdc++.h>
#define MAXN 500007
using namespace std;
string s;
char c[MAXN];
int val[MAXN],sol[MAXN];
int main()
{
	int n,q;
	for(int i=0;i<q;i++)
	{
		int l,r;
		cin>>l>>r;
		int m=r-l+1,sum=0,t=0,mi=0;
		for(int i=l;i<=r;i++) a[i-l]=s[i-1]=='T'?-1:1;
		for(int i=0;i<m;i++) 
		{
			sum+=a[i];
			if(sum<0) {sum=0; a[i]=0; t++;}
		}
		sum=0;
		for(int i=m-1;i>=0;i--) 
		{
			sum+=a[i];
			mi=min(mi,sum);
		}
		cout<<t-mi<<endl;
	}
}

Compilation message (stderr)

election.cpp: In function 'int main()':
election.cpp:15:25: error: 'a' was not declared in this scope
   for(int i=l;i<=r;i++) a[i-l]=s[i-1]=='T'?-1:1;
                         ^
election.cpp:18:9: error: 'a' was not declared in this scope
    sum+=a[i];
         ^
election.cpp:24:9: error: 'a' was not declared in this scope
    sum+=a[i];
         ^
election.cpp:9:6: warning: unused variable 'n' [-Wunused-variable]
  int n,q;
      ^