제출 #1002829

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1002829		Tob	Gap (APIO16_gap)	C++14	89.04 / 100	36 ms	3268 KiB

gap

#include <bits/stdc++.h>

#include "gap.h"

#define F first
#define S second
#define all(x) x.begin(), x.end()
#define pb push_back
#define FIO ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

using namespace std;

typedef long long ll;
typedef pair <ll, ll> pii;
/*
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, int);

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;
}*/

//---------------------------

const ll inf = 1e18;

ll findGap(int t, int n) {
	if (t == 1) {
		ll x = 0, y = inf;
		ll mn=0, mx=inf;
		vector <ll> v;
		for (int i = 0; i < (n+1)/2; i++) {
			MinMax(x, y, &mn, &mx);
			v.pb(mn);
			v.pb(mx);
			x = mn+1; y = mx-1;
		}
		sort(all(v)); v.erase(unique(all(v)), v.end());
		ll res = 0;
		for (int i = 1; i < n; i++) res = max(res, v[i]-v[i-1]);
		return res;
	}
	ll lo=0, hi=0;
	MinMax(0, inf, &lo, &hi);
	ll d = (hi-lo)/(n-1);
	vector <ll> v;
	v = {lo, hi};
	for (ll i = lo+1; i <= hi; i += d) {
		ll a=0, b=0;
		MinMax(i, i+d-1, &a, &b);
		if (a != -1) {v.pb(a); v.pb(b);}
	}
	sort(all(v)); v.erase(unique(all(v)), v.end());
	ll res = 0;
	for (int i = 1; i < v.size(); i++) res = max(res, v[i]-v[i-1]);
	return res;
}

//---------------------------
/*
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);
}*/

컴파일 시 표준 에러 (stderr) 메시지

gap.cpp: In function 'll findGap(int, int)':
gap.cpp:80:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |  for (int i = 1; i < v.size(); i++) res = max(res, v[i]-v[i-1]);
      |                  ~~^~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 59.0374795838 / 70