Submission #713158

#	Time	Username	Problem	Language	Result	Execution time	Memory
713158		bin9638	Gap (APIO16_gap)	C++17	0 / 100	27 ms	1104 KiB

gap

#include <bits/stdc++.h>

#ifndef SKY
#include "gap.h"
#endif // SKY

using namespace std;

#define ll long long
#define pb push_back
#define N 100010
#define ii pair<int,int>
#define fs first
#define sc second
#define ld double

int n;

#ifdef SKY
ll a[N],am=-1;
void MinMax(ll s,ll t, ll*&mn, ll*&mx)
{
    if(s>t)
    {
        cout<<"NGU VC";
        exit(0);
    }
    if(s>a[n]||a[lower_bound(a+1,a+1+n,s)-a]>t)
    {
        mn=&am;
        mx=&am;
        return;
    }
    mn=&a[lower_bound(a+1,a+1+n,s)-a];
    if(t>=a[n])
    {
        mx=&a[n];
        return;
    }
    mx=&a[prev(upper_bound(a+1,a+1+n,t))-a];
}
#endif

long long findGap(int T, int cc)
{
    n=cc;
    ll L=0,R=1e18;
    vector<ll>s;
    while(L<=R)
    {
        ll *A,*B;
        MinMax(L,R,A,B);
        ll u=*A,v=*B;
     //   cout<<L<<" "<<R<<" "<<u<<" "<<v<<endl;
        if(u==-1)
            break;
        s.pb(u);
        s.pb(v);
        L=u+1;
        R=v-1;
    }
    sort(s.begin(),s.end());
   // s.erase(unique(s.begin(),s.end()),s.end());
  //  for(auto u:s)cout<<u<<" ";cout<<endl;
    ll res=0;
    for(int i=0;i<n-1;i++)
        res=max(res,s[i+1]-s[i]);
	return res;
}

#ifdef SKY
int main()
{
    freopen("A.inp","r",stdin);
    freopen("A.out","w",stdout);
    int n,T;
    cin>>T>>n;
    for(int i=1;i<=n;i++)
        cin>>a[i];
    cout<<findGap(T,n)<<endl;
    return 0;
}
#endif // SKY

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:66:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   66 |     for(int i=0;i<n-1;i++)
      |     ^~~
gap.cpp:68:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   68 |  return res;
      |  ^~~~~~
gap.cpp:52:15: warning: 'A' is used uninitialized in this function [-Wuninitialized]
   52 |         MinMax(L,R,A,B);
      |         ~~~~~~^~~~~~~~~
gap.cpp:52:15: warning: 'B' is used uninitialized in this function [-Wuninitialized]

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