Submission #208133

#	Time	Username	Problem	Language	Result	Execution time	Memory
208133		YJU	Watching (JOI13_watching)	C++17	Compilation error	0 ms	0 KiB

watching

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef long double ld;
const ll MOD=1e9+7;
const ll N=2e3+5;
const ld pi=3.14159265359;
const ll INF=(1LL<<62);
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(ll i=1;i<=n;i++)
#define pb push_back
#define mp make_pair
#define X first
#define Y second
#define setp setprecision
#define lwb lower_bound
#define SZ(a) (ll)a.size()

ll n,P,Q,x,DP[N][N];
vector<ll> v;

bool b(ll k){
	memset(DP,0,sizeof(DP));
	DP[0][0]=0;
	REP(i,P+1)REP(j,Q+1){
		DP[i][j+1]=max(DP[i][j+1],(ll)lwb(v.begin(),v.end(),v[DP[i][j]]+2*k)-v.begin());
		DP[i+1][j]=max(DP[i+1][j],(ll)lwb(v.begin(),v.end(),v[DP[i][j]]+1*k)-v.begin());
		if(DP[i][j]==n)return 1;
	}
	return 0;
}

int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);
	cin>>n>>P>>Q;
	P=min(P,n);Q=min(Q,n);
	REP(i,n)cin>>x,v.pb(x);
	sort(v.begin(),v.end());
	ll l=-1,r=MOD;
	while(r-l>1){
		(b((r+l)/2)?r=(r+l)/2:l=(r+l)/2);
	}
	cout<<r<<"\n";
	return 0;
}

Compilation message (stderr)

watching.cpp: In function 'bool b(ll)':
watching.cpp:27:70: error: invalid cast from type '__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >' to type 'll {aka long long int}'
   DP[i][j+1]=max(DP[i][j+1],(ll)lwb(v.begin(),v.end(),v[DP[i][j]]+2*k)-v.begin());
                                                                      ^
watching.cpp:28:70: error: invalid cast from type '__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >' to type 'll {aka long long int}'
   DP[i+1][j]=max(DP[i+1][j],(ll)lwb(v.begin(),v.end(),v[DP[i][j]]+1*k)-v.begin());
                                                                      ^