Submission #710921

#	Time	Username	Problem	Language	Result	Execution time	Memory
710921		Nursik	Lucky Numbers (RMI19_lucky)	C++17	28 / 100	1070 ms	2028 KiB

lucky

#include <iostream>
#include <fstream>
#include <iomanip>
#include <vector>
#include <set>
#include <map>
#include <cstring>
#include <string>
#include <cmath>
#include <cassert>
#include <ctime>
#include <algorithm>
#include <sstream>
#include <list>
#include <queue>
#include <deque>
#include <stack>
#include <cstdlib>
#include <cstdio>
#include <iterator>
#include <functional>
#include <unordered_set>
#include <unordered_map>
#include <stdio.h>
#include <bitset>
 
using namespace std;
 
#define ll long long
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define ld long double

const ll maxn = 1e4 + 1, maxm = 80;
const ll mod = 1e9 + 7, inf = 1e9;
const ld eps = 1e-9;

int n, q;
string s;
int dig[maxn];
ll dp[maxn][10][2];
int calc(string x){
    memset(dp, 0, sizeof(dp));
    x = '#' + x;
    int m = (int)x.size();
    for (int j = 1; j < m; ++j){
        dig[j] = x[j] - '0';
    }
    for (int i = 0; i <= dig[1]; ++i){
        int ni = 1, nj = i, nk = (i == dig[1]);
        dp[ni][nj][nk] = 1;
    }
    for (int i = 2; i < m; ++i){
        for (int j = 0; j < 10; ++j){
            for (int k = 0; k < 2; ++k){
                if (dp[i - 1][j][k] > 0){
                    for (int ndig = 0; ndig < 10; ++ndig){
                        int ni = i, nj = ndig, nk = k;
                        if (k == 0){
                            if (!(ndig == 3 && j == 1)){
                                dp[ni][ndig][nk] = (dp[ni][ndig][nk] + dp[i - 1][j][k]) % mod;
                            }
                        }
                        else{
                            if (ndig < dig[i]){
                                nk = 0;
                                if (!(ndig == 3 && j == 1)){
                                    dp[ni][ndig][nk] = (dp[ni][ndig][nk] + dp[i - 1][j][k]) % mod;    
                                }
                            }
                            nk = k;
                            if (ndig == dig[i]){
                                if (!(ndig == 3 && j == 1)){
                                    dp[ni][ndig][nk] = (dp[ni][ndig][nk] + dp[i - 1][j][k]) % mod;
                                }
                            }
                        }
                    }
                }
            }
        }
    }
    ll ans = 0;
    for (int i = 0; i <= 9; ++i){
        for (int j = 0; j < 2; ++j){
            ans = (ans + dp[m - 1][i][j]) % mod;
           // cout << i << " " << j << " " << dp[m - 1][i][j] << '\n';
        }
    }
    return ans;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> q;
    cin >> s;
    cout << calc(s) << '\n';
    for (int i = 1; i <= q; ++i){
        int type;
        cin >> type;
        if (type == 1){
            int l, r;
            cin >> l >> r;
            string ss = "";
            for (int j = l - 1; j <= r - 1; ++j){
                ss += s[j];
            }
            cout << calc(ss) << '\n';
        }
        else{
            int pos, dig;
            cin >> pos >> dig;
            s[pos - 1] = dig + '0';
        }
    }
}

Compilation message (stderr)

lucky.cpp: In function 'int calc(std::string)':
lucky.cpp:60:37: warning: unused variable 'nj' [-Wunused-variable]
   60 |                         int ni = i, nj = ndig, nk = k;
      |                                     ^~

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 27
• Subtask 5: 0 / 9
• Subtask 6: 0 / 27