Submission #549284

#	Time	Username	Problem	Language	Result	Execution time	Memory
549284		Jarif_Rahman	Misspelling (JOI22_misspelling)	C++17	8 / 100	4054 ms	205352 KiB

misspelling

#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;

const ll md = 1000000007;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n, m; cin >> n >> m;
    vector<vector<int>> gr(n), lr(n);
    vector<vector<int>> grr(n), lrr(n);
    for(int i = 0; i < m; i++){
        int a, b; cin >> a >> b; a--, b--;
        if(a < b) lr[a+1].pb(i), lrr[b].pb(i);
        else gr[b+1].pb(i), grr[a].pb(i);
    }

    vector<vector<ll>> dp(n, vector<ll>(26, 0));
    dp[n-1] = vector<ll>(26, 1);

    for(int I = n-2; I >= 0; I--) for(int J = 0; J < 26; J++){
        set<int> s1, s2;
        for(int i = I+1; i < n; i++){
            if(i != 0){
                for(int x: grr[i-1]) s1.erase(x);
                for(int x: lrr[i-1]) s2.erase(x);
            }
            for(int x: gr[i]) s1.insert(x);
            for(int x: lr[i]) s2.insert(x);

            if(s1.empty() && s2.empty()){
                for(int j = 0; j < 26; j++) dp[I][J]+=dp[i][j], dp[I][J]%=md;
                break;
            }
            if(!s1.empty() && !s2.empty()){
                if(i == n-1) dp[I][J]++, dp[I][J]%=md;
                continue;
            }

            if(!s1.empty()) for(int j = J+1; j < 26; j++) dp[I][J]+=dp[i][j], dp[I][J]%=md;
            else for(int j = 0; j < J; j++) dp[I][J]+=dp[i][j], dp[I][J]%=md;
            if(i == n-1) dp[I][J]++, dp[I][J]%=md;
        }
    }

    ll ans = 0;
    for(ll x: dp[0]) ans+=x, ans%=md;

    cout << ans << "\n";
}

• Subtask 1: 8 / 8
• Subtask 2: 0 / 20
• Subtask 3: 0 / 29
• Subtask 4: 0 / 32
• Subtask 5: 0 / 11