Submission #864367

#	Time	Username	Problem	Language	Result	Execution time	Memory
864367		AgentPengin	Lucky Numbers (RMI19_lucky)	C++11	0 / 100	0 ms	348 KiB

lucky

/**
 *    author:  AgentPengin ( Độc cô cầu bại )
 *    created: 23.12.2022 10:08:02
 *    too lazy to update time
**/
#include<bits/stdc++.h>

#define EL '\n'
#define fi first
#define se second
#define NAME "NAME"
#define ll long long
#define lcm(a,b) (a/gcd(a,b))*b
#define db(val) "["#val" = " << (val) << "] "
#define bend(v) (v).begin(),(v).end()
#define sz(v) (int)(v).size()
#define ex exit(0)

using namespace std;

const ll mod = 1e9 + 7;
const int inf = 0x1FFFFFFF;
const int MAXN = 105;

int n,q,a[MAXN],target;
ll dp[MAXN][2][2];

ll f(int id,bool lower,bool one) {
	if (id == (target + 1)) {
		return 1;
	}
	ll &res = dp[id][lower][one];
	if (res != -1) return res;
	res = 0;
	int up = (lower == true ? 9 : a[id]);
	for (int dig = 0;dig <= up;dig++) {
		bool nxt_lower = lower || (dig < a[id]);
		if (dig == 3 && one) continue;
		res = (res + f(id + 1,nxt_lower,dig == 1)) % mod;
	}
	return res;
}

signed main() {
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    if (ifstream(NAME".inp")) {
        freopen(NAME".inp","r",stdin);
        freopen(NAME".out","w",stdout);
    }
    cin >> n >> q;
    for (int i = 1;i <= n;i++) {
    	char c;
    	cin >> c;
    	a[i] = c - '0';
    }
    while(q--) {
    	int type;
    	cin >> type;
    	if (type == 2) {
    		int pos,val;
    		cin >> pos >> val;
    		a[pos] = val;
    	} else {
    		int l,r;
    		cin >> l >> r;
    		target = r;
    		memset(dp,-1,sizeof dp);
    		cout << f(l,0,0) << EL;
    	}
    }
    
    cerr << "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";
    return 0;
}
// agent pengin wants to take apio (with anya-san)

Compilation message (stderr)

lucky.cpp: In function 'int main()':
lucky.cpp:47:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         freopen(NAME".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
lucky.cpp:48:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |         freopen(NAME".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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