Submission #163205

#	Time	Username	Problem	Language	Result	Execution time	Memory
163205		TadijaSebez	코알라 (JOI13_koala)	C++11	100 / 100	151 ms	7532 KiB

koala

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
const int N=100050;
const int M=2*N;
const ll inf=3e18;
vector<int> ost;
int t[N],b[N];
int l,r,d,a,n;
int root,tsz,ls[M],rs[M];
ll mx[M];
void Set(int &c, int ss, int se, int qs, int qe, ll f)
{
	if(qs>qe || qs>se || ss>qe) return;
	if(!c) c=++tsz,mx[c]=-inf;
	if(qs<=ss && qe>=se){ mx[c]=max(mx[c],f);return;}
	int mid=ss+se>>1;
	Set(ls[c],ss,mid,qs,qe,f);
	Set(rs[c],mid+1,se,qs,qe,f);
}
ll Get(int c, int ss, int se, int qi)
{
	if(ss==se) return mx[c];
	int mid=ss+se>>1;
	if(qi<=mid) return max(mx[c],Get(ls[c],ss,mid,qi));
	else return max(mx[c],Get(rs[c],mid+1,se,qi));
}
int GetO(int x){ return lower_bound(ost.begin(),ost.end(),x%d)-ost.begin()+1;}
void Set(int x, ll p)
{
	int j=GetO(x);
	Set(root,1,ost.size(),j+1,ost.size(),p+(ll)(x/d)*a-a);
	Set(root,1,ost.size(),1,j,p+(ll)(x/d)*a);
}
ll dp[N];
int main()
{
	scanf("%i %i %i %i %i",&l,&r,&d,&a,&n);
	t[0]=l;t[n+1]=r;
	for(int i=1;i<=n;i++) scanf("%i %i",&t[i],&b[i]);
	for(int i=0;i<=n+1;i++) ost.pb(t[i]%d);
	sort(ost.begin(),ost.end());ost.erase(unique(ost.begin(),ost.end()),ost.end());
	mx[0]=-inf;
	Set(l,0);
	for(int i=1;i<=n+1;i++)
	{
		dp[i]=Get(root,1,ost.size(),GetO(t[i]))-(ll)(t[i]/d)*a+b[i];
		Set(t[i],dp[i]);
	}
	printf("%lld\n",dp[n+1]);
	return 0;
}

Compilation message (stderr)

koala.cpp: In function 'void Set(int&, int, int, int, int, long long int)':
koala.cpp:18:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=ss+se>>1;
          ~~^~~
koala.cpp: In function 'long long int Get(int, int, int, int)':
koala.cpp:25:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=ss+se>>1;
          ~~^~~
koala.cpp: In function 'int main()':
koala.cpp:39:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i %i %i %i",&l,&r,&d,&a,&n);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
koala.cpp:41:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1;i<=n;i++) scanf("%i %i",&t[i],&b[i]);
                        ~~~~~^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50