Submission #961930

#	Time	Username	Problem	Language	Result	Execution time	Memory
961930		marinaluca	Palindrome-Free Numbers (BOI13_numbers)	C++14	100 / 100	1 ms	596 KiB

numbers

#include <bits/stdc++.h>
 
#pragma GCC optimize ("O4")
#pragma GCC optimize ("fast-math")
#pragma GCC optimize ("unroll-loops")
 
using namespace std;
#define int long long
#define ll long long
#define XX first
#define YY second
#define all (x) begin(x), end(x)
/**
#define cin fin
#define cout fout
ifstream cin ("pfn.in");
ofstream cout ("pfn.out");
**/
/**typedef double dbl;
typedef long double ldb;
typedef pair <int, int> pii;
typedef vector <int> vii;
typedef pair <double, int> pdi;**/
vector <int> v;
const int NMAX = 10;
const int VMAX = 1;
const int RMAX = 179;
int x, y;
int dp[20][2][2][2];
void constr (int x){
    if (x < 10){
        v.push_back(x);
        return;
    }
    constr (x / 10);
    v.push_back(x % 10);
}
 
int gigel (int i, int s, int t, int a, int b, int poz){
    if (i == v.size())
        return true;
    if (dp[i][s][t][a] != -1)
        return dp[i][s][t][a];
    int idx = 9, sum = 0;
    if (s == 0)
        idx = v[i];
    for (int in = 0; in <= idx; ++ in){
        if (in == poz && t) continue;
        if (a && in == b)   continue;
        sum += gigel (i + 1, s | (in < idx),  t | (in > 0) , a | t , poz , in);
    }
    return dp[i][s][t][a] = sum;
}
 
int solve (int a){
     if (a == -1)
        return 0;
    v.clear();
    constr (a);
    memset (dp, -1, sizeof dp);
    return gigel (0, 0, 0,0,0,0);
}
signed main(void){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin >> x >> y;
    cout << solve(y) - solve(x - 1);
    return 0 ^ 0;
}

Compilation message (stderr)

numbers.cpp: In function 'long long int gigel(long long int, long long int, long long int, long long int, long long int, long long int)':
numbers.cpp:40:11: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     if (i == v.size())
      |         ~~^~~~~~~~~~~

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