Submission #8460

#	Time	Username	Problem	Language	Result	Execution time	Memory
8460		gs13023	Languages (IOI10_languages)	C++98	45 / 100	2120 ms	44748 KiB

lang

#include<cstdio>
#include<string.h>
#include"grader.h"
#include"lang.h"
#define MOD 65536
int lang_freq[60][70000];
long long lang_flow1[60][70000];
long long lang_flow2[60][70000];
long long f1(int a,int b)
{
	return ((a<<6)^b)%MOD;
}
long long f2(int a,int b,int c)
{
	return ((a<<12)^(b<<6)^c)%MOD;
}
void excerpt(int *E)
{
	int ans=0,ansp=0;
	int pos[60]={0};
	for(int i=0;i<56;i++)
	{
		for(int j=0;j<100;j++)
		{
			pos[i]+=lang_freq[i][E[j]];
			if(j>0)pos[i]+=lang_flow1[i][f1(E[j-1],E[j])]*2;
			if(j>1)pos[i]+=lang_flow2[i][f2(E[j-2],E[j-1],E[j])]*3;
		}
		if(ansp<pos[i])ansp=pos[i],ans=i;
	}
	int lang=language(ans);
	for(int i=0;i<100;i++)
	{
		lang_freq[lang][E[i]]++;
		if(i>0)
		{
			lang_flow1[lang][f1(E[i-1],E[i])]++;
		}
		if(i>1)
		{
			lang_flow2[lang][f2(E[i-2],E[i-1],E[i])]++;
		}
	}
}

• Subtask 1: 30 / 30
• Subtask 2: 15 / 80