Submission #1961613

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Source Code Expand

#include "bits/stdc++.h"
using namespace std;
int main()
{
	cin.tie(0);
	ios::sync_with_stdio(false);
	string a;
	cin >> a;
	int s = (int)a.length(), dp[s + 1][25][2] = {}, ten[10];
	dp[0][0][0] = 1;
	ten[0] = 1;
	for(int i = 1; i < 10; ten[i] = (ten[i - 1] * 10) % 25, i++);
	for(int i = 0; i < s; i++)
	{
		for(int j = 0; j < 25; j++)
		{
			for(int k = 0; k < 2; k++)
			{
				int lim = k ? 9 : a[i] - '0';
				for(int l = 0; l <= lim; l++)
				{
					dp[i + 1][(j + l * ten[s - i - 1]) % 25][k || l < lim] += dp[i][j][k];
				}
			}
		}
	}
	printf("%d\n", dp[s][0][0] + dp[s][0][1] - 1);
}

Submission Info

Judge Result