Submission #1120112

#	Time	Username	Problem	Language	Result	Execution time	Memory
1120112		12345678	Misspelling (JOI22_misspelling)	C++17	28 / 100	46 ms	2040 KiB

misspelling

#include <bits/stdc++.h>

using namespace std;

const int nx=2e3+5, kx=26, mod=1e9+7;

int n, m, a, b, dp[nx][kx], res, cu[nx], cd[nx];
vector<int> up[nx], dn[nx];

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>m;
    for (int i=1; i<=m; i++)
    {
        cin>>a>>b;
        if (a<b) dn[a+1].push_back(b);
        else up[b+1].push_back(a);
    }
    for (int i=n; i>=1; i--)
    {
        for (int c=0; c<26; c++)
        {
            dp[i][c]=1;
            for (int j=i+1; j<=n; j++)
            {
                if (!cu[j])
                {
                    for (int d=0; d<c; d++)
                    {
                        dp[i][c]=(dp[i][c]+dp[j][d])%mod;
                    }
                }
                if (!cd[j])
                {
                    for (int d=c+1; d<26; d++)
                    {
                        dp[i][c]=(dp[i][c]+dp[j][d])%mod;
                    }
                }
                
            }
            //cout<<"debug "<<i<<' '<<c<<' '<<dp[i][c]<<'\n';
        }
        for (auto x:up[i]) for (int j=i; j<=x; j++) cu[j]=1;
        for (auto x:dn[i]) for (int j=i; j<=x; j++) cd[j]=1;
    }
    for (int c=0; c<26; c++) res=(res+dp[1][c])%mod;
    cout<<res;
}

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