Submission #47139

#	Time	Username	Problem	Language	Result	Execution time	Memory
47139		yusufake	Gap (APIO16_gap)	C++98	100 / 100	77 ms	4552 KiB

gap

#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;

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;
}
*/
typedef long long ll;

ll f(ll l, ll r, ll pl, ll pr, ll zz){
    if(l > r || zz <= 0) return pr-pl;
	ll mn,mx;
    MinMax(l,r,&mn,&mx);
	ll t = max(mn-pl , pr-mx);
    return max(t , f(mn+1,mx-1,mn,mx,zz-2));	
}	

long long findGap(int T, int n){
	if(T == 1) return f(0,1e18,1e18,0,n);
    ll las=0, t, res, p, mn, mx;
    MinMax(0,1e18,&mn,&mx);
    res = t = (mx-mn) / (n-1);  
    p = mn;
    ll mxx = mx;
    ll mnn = mn;
    for(;;){
        MinMax(p,p+t,&mn,&mx);
        res = max(res , las ? mn-las : 0);
        las = mx == -1 ? las : mx;
        p = p+t+1;
        if(p > mxx) return res;
    }
   
    
    return 0;
}

/*
int main()
{
	A[1] = 2;
	A[2] = 3;
	A[3] = 6;
	A[4] = 8;
    N = 4;
    subtask_num = 2;
	printf("%lld\n", findGap(2, 4));
	printf("%lld\n", call_count);
}
*/

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:52:8: warning: unused variable 'mnn' [-Wunused-variable]
     ll mnn = mn;
        ^~~

• Subtask 1: 30 / 30
• Subtask 2: 70 / 70