結果
| 問題 |
No.1909 Detect from Substrings
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2022-04-24 01:53:01 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 945 ms / 2,000 ms |
| コード長 | 4,071 bytes |
| コンパイル時間 | 2,904 ms |
| コンパイル使用メモリ | 199,056 KB |
| 実行使用メモリ | 39,792 KB |
| 最終ジャッジ日時 | 2024-06-25 11:05:21 |
| 合計ジャッジ時間 | 24,180 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 36 |
コンパイルメッセージ
main.cpp: In function 'int main()':
main.cpp:91:23: warning: 'pos1' may be used uninitialized [-Wmaybe-uninitialized]
91 | for(int i = 0 ; i < pos1 ; i ++ ){
| ~~^~~~~~
main.cpp:77:9: note: 'pos1' was declared here
77 | int pos1,pos2;
| ^~~~
ソースコード
#pragma GCC optimize("O3")
#include<bits/stdc++.h>
using namespace std;
const int N = 1e6 + 10;
unsigned long long has[N],base[N];
unsigned long long get(int l,int r){
if(r < l)return 0;
return has[r] - has[l-1] * base[r-l+1];
}
unordered_map<unsigned long long,int>mp;
int main(){
base[0] = 1;
for(int i = 1 ; i < N ; i ++ )base[i] = base[i-1] * 131;
int n,m;cin >> n >> m;
vector<string>s(n);
for(int i = 0 ; i < n ; i ++ ){
cin >> s[i];
}
sort(s.begin(),s.end());
s.resize(unique(s.begin(),s.end())-s.begin());
if(s.size() == 1){
return cout << (m+1) * 26,0;
}
string ta = s[0] + s[1][s[1].size()-1];
for(int i = 1 ; i <= m+1 ; i ++ ){
has[i] = has[i-1] * 131 + ta[i-1];
}
for(int i = 1 ; i <= m+1 ; i ++ ){
mp[get(1,i-1) * 131 + get(i+1,m+1)];
}
bool ok = 0;
// cout << get(2,m+1) << '\n';
mp[get(1,m)] = mp[get(2,m+1)] = 1;
for(int i = 0 ; i < n ; i ++ ){
ok = 0;
for(int j = 1 ; j <= m ; j ++ ){
has[j] = has[j-1] * 131 + s[i][j-1];
}
// cout << get(1,2) << '\n';
for(int j = 1 ; j <= m ; j ++ ){
// cout << get(j,m) << '\n';
if(mp.count(get(1,j-1) * 131 + get(j,m))){
ok = 1;
break;
}
}
if(ok == 0)break;
}
if(ok){
string tb = s[1][0] + s[0];
mp.clear();
for(int i = 1 ; i <= m+1 ; i ++ ){
has[i] = has[i-1] * 131 + tb[i-1];
}
for(int i = 1 ; i <= m+1 ; i ++ ){
mp[get(1,i-1) * 131 + get(i+1,m+1)];
}
mp[get(1,m)] = mp[get(2,m+1)] = 1;
for(int i = 0 ; i < n ; i ++ ){
ok = 0;
for(int j = 1 ; j <= m ; j ++ ){
has[j] = has[j-1] * 131 + s[i][j-1];
}
for(int j = 1 ; j <= m ; j ++ ){
if(mp.count(get(1,j-1) * 131 + get(j,m))){
ok = 1;
break;
}
}
if(ok == 0)break;
}
if(ok)return cout << 2,0;
}
int pos1,pos2;
for(int i = 0 ; i < m ; i ++ ){
pos1 = i;
if(s[0][i] != s[1][i])break;
}
for(int i = m-1 ; i > 0 ; i -- ){
pos2 = i;
if(s[0][i] != s[1][i])break;
}
ok = 0;
for(int i = pos1 ; i < pos2 ; i ++ ){
if(s[0][i] != s[1][i+1])ok = 1;
}
string x;
for(int i = 0 ; i < pos1 ; i ++ ){
x += s[0][i];
}
string y = x;
// if(!ok){
x += s[1][pos1];
for(int i = pos1 ; i < s[0].size() ; i ++ )x += s[0][i];
// }
// else{
y += s[0][pos1];
for(int i = pos1 ; i < s[1].size() ; i ++ )y += s[1][i];
// }
mp.clear();
for(int i = 1 ; i <= m+1 ; i ++ ){
has[i] = has[i-1] * 131 + x[i-1];
}
for(int i = 1 ; i <= m+1 ; i ++ ){
mp[get(1,i-1) * 131 + get(i+1,m+1)];
}
ok = 0;
mp[get(1,m)] = mp[get(2,m+1)] = 1;
for(int i = 0 ; i < n ; i ++ ){
ok = 0;
for(int j = 1 ; j <= m ; j ++ ){
has[j] = has[j-1] * 131 + s[i][j-1];
}
for(int j = 1 ; j <= m ; j ++ ){
if(mp.count(get(1,j-1) * 131 + get(j,m))){
ok = 1;
break;
}
}
if(ok == 0)break;
}
int res = ok;
ok = 0;
x = y;
// cout << x << '\n';
mp.clear();
for(int i = 1 ; i <= m+1 ; i ++ ){
has[i] = has[i-1] * 131 + x[i-1];
}
for(int i = 1 ; i <= m+1 ; i ++ ){
mp[get(1,i-1) * 131 + get(i+1,m+1)];
}
ok = 0;
mp[get(1,m)] = mp[get(2,m+1)] = 1;
for(int i = 0 ; i < n ; i ++ ){
ok = 0;
for(int j = 1 ; j <= m ; j ++ ){
has[j] = has[j-1] * 131 + s[i][j-1];
}
for(int j = 1 ; j <= m ; j ++ ){
if(mp.count(get(1,j-1) * 131 + get(j,m))){
ok = 1;
break;
}
}
if(ok == 0)break;
}
res += ok;
cout << res << '\n';
}