#include <stdio.h>
#include <stdlib.h>
#include <bits/stdc++.h>
using namespace std;
#include "gap.h"
static void my_assert(int k){ if (!k) exit(1); }
static int subtask_num, N;
static long long A[100001];
static long long call_count;
long long findGap(int T, int N){
if(T==1){
long long mn=-1,mx=-1;
MinMax(1,1000000000000000000,&mn,&mx);
long long premn=mn,premx=mx;
long long ans=0;
for(int i=1;i<(N+1)/2;i++){
premn=mn,premx=mx;
MinMax(mn+1,mx-1,&mn,&mx);
ans=max(ans,mn-premn);
ans=max(ans,premx-mx);
}
ans=max(ans,mx-mn);
return ans;
}
long long mn=-1,mx=-1;
MinMax(1,1000000000000000000,&mn,&mx);
long long diff = mx-mn;
long long mxx = mx;
long long mnd=diff/(N-1);
long long ans=mnd,curm=mn;
for(long long i=mn+1;i<=mxx-1;i+=mnd){
// cout<<i<<' '<<i+mnd-1<<' ';
MinMax(i,min(mxx-1,i+mnd-1),&mn,&mx);
// cout<<mn<<' '<<mx<<endl;
if(mn==-1) continue;
// cout<<mn<<' '<<curm<<endl;
ans=max(ans,mn-curm);
curm=mx;
}
return ans;
}
void MinMax(long long s, long long t, long long *mn, long long *mx)
{
int lo = 1, hi = N, left = N+1, right = 0;
my_assert(s <= t && mn != NULL && mx != NULL);
while (lo <= hi){
int mid = (lo+hi)>>1;
if (A[mid] >= s) hi = mid - 1, left = mid;
else lo = mid + 1;
}
lo = 1, hi = N;
while (lo <= hi){
int mid = (lo+hi)>>1;
if (A[mid] <= t) lo = mid + 1, right = mid;
else hi = mid - 1;
}
if (left > right) *mn = *mx = -1;
else{
*mn = A[left];
*mx = A[right];
}
if (subtask_num == 1) call_count++;
else if (subtask_num == 2) call_count += right-left+2;
}
int main()
{
FILE *in = stdin, *out = stdout;
my_assert(2 == fscanf(in, "%d%d", &subtask_num, &N));
my_assert(1 <= subtask_num && subtask_num <= 2);
my_assert(2 <= N && N <= 100000);
for (int i=1;i<=N;i++) my_assert(1 == fscanf(in, "%lld", A+i));
for (int i=1;i<N;i++) my_assert(A[i] < A[i+1]);
fprintf(out, "%lld\n", findGap(subtask_num, N));
fprintf(out, "%lld\n", call_count);
}
Compilation message
/usr/bin/ld: /tmp/ccoo4Q7G.o: in function `MinMax(long long, long long, long long*, long long*)':
grader.cpp:(.text+0x0): multiple definition of `MinMax(long long, long long, long long*, long long*)'; /tmp/ccAVJ1FE.o:gap.cpp:(.text+0x0): first defined here
/usr/bin/ld: /tmp/ccoo4Q7G.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccAVJ1FE.o:gap.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status
