Submission #282952

#	Time	Username	Problem	Language	Result	Execution time	Memory
282952		AKaan37	Palindrome-Free Numbers (BOI13_numbers)	C++17	20 / 100	1 ms	512 KiB

numbers

//Bismillahirrahmanirrahim
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#include <bits/stdc++.h>

using namespace std;

typedef long long lo;
typedef pair< lo,lo > PII;

#define fi first
#define se second
#define mp make_pair
#define endl "\n"
#define pb push_back
#define int long long
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)

const lo inf = 1000000000000000000;
const lo KOK = 100000;
const lo LOG = 30;
const lo li = 500005;
const lo mod = 1000000007;

int n,m,b[li],a[li],k,flag,t,dp[22][4][13][13];
int cev;
string s;
vector<int> v,vv;

inline int f(int sira,int al,int last2,int last1){
	int cevv=0;
	if(sira==(int)v.size())return 1;
	if(~dp[sira][al][last2][last1])return dp[sira][al][last2][last1];
	for(int i=0;i<=9;i++){
		if(al==0 && i>v[sira])break;
		if(i==last2 || i==last1)continue;
		if(sira==0 && i==0)continue;
		int yes=0;
		if(i<v[sira])yes=1;
		cevv=(cevv+f(sira+1,max(yes,al),last1,i));
	}
	return dp[sira][al][last2][last1]=cevv;
}

inline int f1(int sira,int al,int last2,int last1){
	int cevv=0;
	if(sira==(int)vv.size())return 1;
	if(~dp[sira][al][last2][last1])return dp[sira][al][last2][last1];
	for(int i=0;i<=9;i++){
		if(al==0 && i>vv[sira])break;
		if(i==last2 || i==last1)continue;
		if(sira==0 && i==0)continue;
		int yes=0;
		if(i<vv[sira])yes=1;
		cevv=(cevv+f1(sira+1,max(yes,al),last1,i));
	}
	return dp[sira][al][last2][last1]=cevv;
}

main(void){
	scanf("%lld %lld",&n,&m);
	n--;
	while(n){
		v.pb(n%10);
		n/=10;
	}
	while(m){
		vv.pb(m%10);
		m/=10;
	}
	reverse(v.begin(),v.end());
	reverse(vv.begin(),vv.end());
	memset(dp,-1,sizeof(dp));
	cev=-f(0,0,10,10);
	memset(dp,-1,sizeof(dp));
	printf("%lld\n",cev+f(0,0,10,10));
	return 0;
}

Compilation message (stderr)

numbers.cpp:66:10: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   66 | main(void){
      |          ^
numbers.cpp: In function 'int main()':
numbers.cpp:67:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   67 |  scanf("%lld %lld",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 25
• Subtask 2: 20 / 75