Submission #1019950

#	Time	Username	Problem	Language	Result	Execution time	Memory
1019950		alexdd	Misspelling (JOI22_misspelling)	C++17	100 / 100	960 ms	307024 KiB

misspelling

#include<bits/stdc++.h>
using namespace std;
#define int long long
const int MOD = 1e9+7;
int n,m;
int dp[500005][30];
int pref[500005][30];
vector<pair<int,int>> baga[500005],scoate[500005];
signed main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin>>n>>m;
    int a,b;
    for(int i=1;i<=m;i++)
    {
        cin>>a>>b;
        if(a==b)
            continue;
        if(a<b)
        {
            baga[a+1].push_back({b,0});
            scoate[b].push_back({a+1,0});
        }
        else
        {
            swap(a,b);
            baga[a+1].push_back({b,1});
            scoate[b].push_back({a+1,1});
        }
    }
    for(int c=0;c<26;c++)
        dp[1][c]=pref[1][c]=1;
    int rez=26;
    set<pair<int,int>> s[2];
    for(int i=2;i<=n;i++)
    {
        for(auto [ri,tip]:baga[i])
            s[tip].insert({i,ri});
        int p0=1,p1=1;
        if(!s[0].empty()) p0 = (*prev(s[0].end())).first;
        if(!s[1].empty()) p1 = (*prev(s[1].end())).first;
        for(int c=0;c<26;c++)
        {

            for(int u=c+1;u<26;u++)
                dp[i][c] += pref[i-1][u]-pref[p1-1][u]+MOD;
            for(int u=0;u<c;u++)
                dp[i][c] += pref[i-1][u]-pref[p0-1][u]+MOD;
            dp[i][c]%=MOD;
            pref[i][c] = (pref[i-1][c] + dp[i][c])%MOD;
            rez = (rez + dp[i][c])%MOD;
        }
        for(auto [le,tip]:scoate[i])
            s[tip].erase({le,i});
    }
    cout<<rez;
    return 0;
}

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