Submission #153898

#	Time	Username	Problem	Language	Result	Execution time	Memory
153898		songc	Gap (APIO16_gap)	C++14	30 / 100	78 ms	4492 KiB

gap

#include <bits/stdc++.h>
#include "gap.h"
#define INF 1'000'000'000'000'000'000ll
using namespace std;
typedef long long LL;
typedef pair<int,int> pii;

LL ans, C;
LL Min, Max;
vector<LL> V;

long long findGap(int T, int N){
	if (T == 1){
		LL l=0, r=INF;
		for (int i=0; i<N; i+=2){
			LL x, y;
			MinMax(l, r, &x, &y);
			V.push_back(x);
			V.push_back(y);
			l=x+1, r=y-1;
		}
	}
	else{
		MinMax(0, INF, &Min, &Max);
		ans = C = (Max-Min+N-1)/N;
		LL t = Min;
		V.push_back(Min);
		while (t+C <= Max){
			LL x, y;
			MinMax(t+1, min(t+C, Max-1), &x, &y);
			if (x>=0) V.push_back(x);
			if (y>=0) V.push_back(y);
			t += C;
		}
		V.push_back(Max);
	}
	sort(V.begin(), V.end());
	for (int i=0; i<V.size()-1; i++) ans = max(ans, V[i+1]-V[i]);
	return ans;
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:38:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0; i<V.size()-1; i++) ans = max(ans, V[i+1]-V[i]);
                ~^~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 0 / 70