Submission #549358

#	Time	Username	Problem	Language	Result	Execution time	Memory
549358		Jarif_Rahman	Misspelling (JOI22_misspelling)	C++17	28 / 100	4129 ms	1031072 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;

struct segtree{
    struct node{
        ll sm, lazy_assign;
        node(){
            sm = 0, lazy_assign = -1;
        }
        node(ll x){
            sm = x, lazy_assign = -1;
        }
        node operator+(node a){
            return node((sm+a.sm)%md);
        }
        void propagate(node a, ll sz){
            if(a.lazy_assign == -1) return;
            sm = (a.lazy_assign*sz)%md;
            lazy_assign = a.lazy_assign;
        }
    };
    int k;
    vector<node> v;
    segtree(){}
    segtree(int n){
        k = 1;
        while(k < n) k*=2;
        k*=2;
        v.resize(k, node());
    }
    void assign(int l, int r, int nd, int a, int b, ll x){
        if(a > r || b < l) return;
        if(a >= l && b <= r){
            v[nd].sm = ((b-a+1)*x)%md;
            v[nd].lazy_assign = x;
            return;
        }
        int md = (a+b)/2;
        v[2*nd].propagate(v[nd], md-a+1);
        v[2*nd+1].propagate(v[nd], b-md);
        v[nd].lazy_assign = -1;
        assign(l, r, 2*nd, a, md, x);
        assign(l, r, 2*nd+1, md+1, b, x);
        v[nd] = v[2*nd]+v[2*nd+1];
    }
    void assign(int l, int r, ll x){
        assign(l, r, 1, 0, k/2-1, x%md);
    }
    ll sum(int l, int r, int nd, int a, int b){
        if(a > r || b < l) return 0;
        if(a >= l && b <= r) return v[nd].sm;
        int md = (a+b)/2;
        v[2*nd].propagate(v[nd], md-a+1);
        v[2*nd+1].propagate(v[nd], b-md);
        v[nd].lazy_assign = -1;
        ll rt = sum(l, r, 2*nd, a, md) + sum(l, r, 2*nd+1, md+1, b);
        rt%=::md;
        v[nd] = v[2*nd]+v[2*nd+1];
        return rt;
    }
    ll sum(int l, int r){
        return sum(l, r, 1, 0, k/2-1);
    }
};

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

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

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

    segtree high[26], low[26];
    fill(high, high+26, segtree(n));
    fill(low, low+26, segtree(n));
    vector<bool> marked(n, 0);

    for(int i = 0; i < 26; i++) low[i].assign(n-1, n-1, i+1), high[i].assign(n-1, n-1, 26-i);

    for(int i = n-2; i >= 0; i--){
        for(int x: gr[i]){
            for(int j = i; j <= x; j++) marked[j] = 1;
            for(int j = 0; j < 26; j++) low[j].assign(i, x, 0);
        }
        for(int x: lr[i]){
            for(int j = i; j <= x; j++) marked[j] = 1;
            for(int j = 0; j < 26; j++) high[j].assign(i, x, 0);
        }

        int lm = -1;
        for(int j = i+1; j < n; j++) if(!marked[j]){
            lm = j;
            break;
        }

        for(int j = 0; j < 26; j++){
            if(j != 0) dp[i][j]+=low[j-1].sum(i, lm==-1?n-1:lm-1),dp[i][j]%=md;
            if(j != 25) dp[i][j]+=high[j+1].sum(i, lm==-1?n-1:lm-1),dp[i][j]%=md;
            if(lm == -1) dp[i][j]++, dp[i][j]%=md;
            else dp[i][j]+=high[0].sum(lm, lm);
        }

        ll s = 0;
        for(int j = 0; j < 26; j++) s+=dp[i][j], s%=md, low[j].assign(i, i, s);
        s = 0;
        for(int j = 25; j >= 0; j--) s+=dp[i][j], s%=md, high[j].assign(i, i, s);
    }

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

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

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