Submission #623704

#	Time	Username	Problem	Language	Result	Execution time	Memory
623704		sword060	Gap (APIO16_gap)	C++17	83.51 / 100	62 ms	2248 KiB

gap

#include <bits/stdc++.h>
#include "gap.h"
using namespace std;
long long findGap(int q,int x){
  if(q==2){
    long long l=0,r=1e18;
    MinMax(l,r,&l,&r);
    long long xd=l,lol=(r-l+x-2)/(x-1),ans=lol,c1,c2,i;
    while(i+lol<r){
      MinMax(i,i+lol,&c1,&c2);
      if(c1!=-1)ans=max(ans,c1-xd),xd=c2;
      i+=lol+1;
    }
    MinMax(i,r,&c1,&c2);
    if(c1!=-1)ans=max(ans,c1-xd);
    return ans;
  }else{
    vector<long long>a;
    long long c=0,v=1e18,zz=x;
    while(zz&&c<=v){
      long long l,r;
      MinMax(c,v,&l,&r);
      if(l==-1)break;
      a.push_back(l);if(l!=r)a.push_back(r);
      c=l+1;v=r-1;zz-=2;
    }
    sort(a.begin(),a.end());
    long long ret=0;
    for(int i=0;i<(int)a.size()-1;i++)ret=max(ret,a[i+1]-a[i]);
    return ret;
  }
  return 0;
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:9:12: warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized]
    9 |     while(i+lol<r){
      |           ~^~~~

• Subtask 1: 30 / 30
• Subtask 2: 53.5083487467 / 70