Submission #284895

#	Time	Username	Problem	Language	Result	Execution time	Memory
284895		triplem5ds	Gap (APIO16_gap)	C++14	100 / 100	93 ms	3312 KiB

gap

#include "gap.h"
#include "bits/stdc++.h"
using namespace std;
long long findGap(int T, int N)
{
  long long ans = 0;
  long long mn, mx;
  if(T == 1){
    vector<long long> L, R;

    long long LO = 0, HI = 1000000000000000000;
    while(L.size() + R.size() < N){
      MinMax(LO,HI, & mn, & mx);

      L.push_back(mn);
      R.push_back(mx);

      LO = mn + 1;
      HI = mx - 1;
    }

    reverse(R.begin(),R.end());
    if(N & 1)
      L.pop_back();
    vector<long long> v;
    for(auto x : L)v.push_back(x);
    for(auto x : R)v.push_back(x);

    for(int i =  1; i < v.size(); i++)
      ans = max(ans, v[i] - v[i-1]);
  } else {

      MinMax(0, 1000000000000000000, &mn, &mx);

      long long d = (mx - mn + N - 3) / (N - 1);

      vector<long long> v({mn, mx});

      long long cur = mn + 1;

      while(cur < v[1]) {

        MinMax(cur, min(v[1] - 1, cur + d - 1), &mn, &mx);
        cur += d;

        if(mn == -1)continue;

        v.push_back(mn);
        v.push_back(mx);

      }

      sort(v.begin(),v.end());

      for(int i = 1; i < v.size(); i++)
        ans = max(ans, v[i] - v[i-1]);

  }
  return ans;
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:12:31: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   12 |     while(L.size() + R.size() < N){
      |           ~~~~~~~~~~~~~~~~~~~~^~~
gap.cpp:29:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |     for(int i =  1; i < v.size(); i++)
      |                     ~~^~~~~~~~~~
gap.cpp:55:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |       for(int i = 1; i < v.size(); i++)
      |                      ~~^~~~~~~~~~

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