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#include <iostream> using namespace std; int dp[200005][8]; int main() { int n; cin >> n; string s; cin >> s; for(int i = 0; i <= n; i++) { for(int j = 0; j < 8; j++) { dp[i][j] = 0; } } dp[0][0] = 1; int MOD = 1e9 + 7; for(int i = 0; i < n; i++) { for(int remainder = 0; remainder < 8; remainder++) { dp[i + 1][remainder] += dp[i][remainder]; dp[i + 1][remainder] %= MOD; dp[i + 1][(remainder * 10 + (s[i] - '0')) % 8] += dp[i][remainder]; dp[i + 1][(remainder * 10 + (s[i] - '0')) % 8] %= MOD; } } cout << dp[n][0] - 1 << endl; }
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