Gap

input/code.cpp:14:12: error: 'long long int findGap' redeclared as different kind of symbol
 ll findGap(T, N) {
            ^
In file included from input/code.cpp:2:0:
input/gap.h:27:11: note: previous declaration 'long long int findGap(int, int)'
 long long findGap(int T, int N);
           ^~~~~~~
input/code.cpp:14:12: error: 'T' was not declared in this scope
 ll findGap(T, N) {
            ^

#include <bits/stdc++.h>
#include "gap.h"
#define ll long long
#define ull unsigned long long
#define ld long double
#define M 1000000007
#define N (1<<18)
#define P complex<long long>
#define X real()
#define Y imag()

using namespace std;

ll findGap(T, N) {
	if(T == 1) {
		ll ans = 0;
		ll s=0, t=1e18, mn, mx;
		MinMax(s, t, &mn, &mx);
		while(true) {
			t = mx-1;
			ll ed = mx;
			MinMax(s, t, &mn, &mx);
			if(mx == -1)
				break;
			ans = max(ans, ed-mx);
		}
		return ans;
	} else {
		return -1;
	}
}