Submission #845430

#	Time	Username	Problem	Language	Result	Execution time	Memory
845430		vjudge1	Trener (COCI20_trener)	C++17	22 / 110	9 ms	600 KiB

trener

#include <bits/stdc++.h>
#pragma optimize "DostSeferoğlu"
#pragma GCC optimize("unroll-loops,Ofast")
#pragma GCC target("avx2,tune=native")
using namespace std;
#define int long long
#define pii pair<int,int>
#define bg begin
#define vi vector<int>
#define endl '\n'
#define vvi vector<vi> 
#define pc __builtin_popcountll
#define vp vector<pii>
#define sp << " " << 
#define all(x) x.bg()+1,x.end()
#define ff first
#define ss second
#define brake {cout << "OK\n";return;}
#define debug(x) {cout << #x << ": "; for (auto it : x) cout << it << " ";cout << endl;}
#define FF(xxx,sss,yyy) for (int xxx=sss;xxx<=yyy;++xxx)
#define F(xx,yy) for (int xx=1;xx<=yy;++xx)
#define pb push_back 
const int inf = 1e18;
const int MOD = 1e9+7;   
const int N = 2e5+1;
std::random_device rd;
std::mt19937 gen(rd());
std::uniform_int_distribution<> distrib(10000,1000000007);
const int B = distrib(gen);
int add(int x,int y) {
    return ((x%MOD)+(y%MOD))%MOD;
}
int mult(int x,int y) {
    return ((x%MOD)*(y%MOD))%MOD;
}
int hsh(string& s) {
    if (s.size()==1) return s.back();
    char c = s.back();
    s.pop_back();
    return (add(mult(B,hsh(s)),c));
}

void solve() {
    int n,k;
    cin >> n >> k;
    int fhash[n+1][k+1],phash[n+1][k+1],shash[n+1][k+1];
    F(i,n) {
        F(j,k) {
            string s;
            cin >> s;
            string t,t2;
            for (int x=0;x<i;x++) {
                if(x) t2+=s[x];
                if(x<i-1)t+=s[x];
            }
            fhash[i][j] = hsh(s);
            if (i>1) {
                shash[i][j] = hsh(t2);
                phash[i][j] = hsh(t);
            }
        }
    }
    int ans[n+1][k+1];
    memset(ans,0,sizeof ans);
    F(i,k) ans[1][i] = 1;
    for (int i=1;i<n;i++) {
        for (int j=1;j<=k;j++) {
            for (int j2=1;j2<=k;j2++) {
                if (phash[i+1][j2] == fhash[i][j] || shash[i+1][j2] == fhash[i][j]) {
                    ans[i+1][j2]+=ans[i][j];
                }
            }
        }
    }
    int sm =  0;
    F(i,k) {
        sm = add(sm,ans[n][i]);
    }
    cout << sm << endl;
}    



signed main() { 
    ios_base::sync_with_stdio(0);cin.tie(0);
    #ifdef Local
        freopen("input.in", "r", stdin);
        freopen("input.out", "w", stdout);  
    #endif
    int t = 1;
    //cin >> t;
    while (t --> 0) solve();
}

Compilation message (stderr)

trener.cpp:2: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    2 | #pragma optimize "DostSeferoğlu"
      |

• Subtask 1: 22 / 22
• Subtask 2: 0 / 33
• Subtask 3: 0 / 55