/*
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("O3")
#pragma GCC target ("avx2")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("unroll-loops")
*/
#include<bits/stdc++.h>
#define ld long double
#define sz(v) (int)v.size()
#define ll long long
#define pb push_back
#define x first
#define y second
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define nl "\n"
using namespace std;
using pii = pair<int, int>;
const int N = (int)3e4 + 7; // make sure this is right
const int M = (int)2e3 + 7;
const int inf = (int)2e9 + 7;
const ll INF = (ll)3e18 + 7;
const double PI = acos(-1);
ll MOD = (ll)1e9 + 7; // make sure this is right
bool bit(int x, int i) {
return x >> i & 1;
}
int sum(int x, int y) {
x += y;
if(x >= MOD) x -= MOD;
return x;
}
pii dir[] = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};
string s, t, S;
int dp[4003][4003];
void solve() {
cin >> s >> t;
int n = sz(s), m = sz(t);
s = '#' + s;
S = s;
t = '#' + t;
int ans = 0;
for(int x = 0; x < n; ++x) {
if(n * m * n <= 150000000 && rand() & 1) continue;
string w;
for(int i = n - x + 1; i <= n; ++i) w += S[i];
for(int i = 1; i <= n - x; ++i) w += S[i];
s = '#' + w;
for(int i = 1; i <= n; ++i) {
for(int j = 1; j <= m; ++j) {
if(s[i] == t[j]) dp[i][j] = dp[i - 1][j - 1] + 1;
else dp[i][j] = max(dp[i][j - 1], dp[i - 1][j]);
}
}
ans = max(ans, dp[n][m]);
}
for(int x = 0; x < n; ++x) {
if(n * m * n <= 150000000 rand() & 1) continue;
string w;
for(int i = x; i >= 1; --i) w += S[i];
for(int i = n; i > x; --i) w += S[i];
s = '#' + w;
for(int i = 1; i <= n; ++i) {
for(int j = 1; j <= m; ++j) {
if(s[i] == t[j]) dp[i][j] = dp[i - 1][j - 1] + 1;
else dp[i][j] = max(dp[i][j - 1], dp[i - 1][j]);
}
}
ans = max(ans, dp[n][m]);
}
cout << ans << "\n";
}
signed main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
srand(time(NULL));
// freopen("g.in", "r", stdin);
// freopen("g.out", "w", stdout);
int test = 1;
//cin >> test;
for(int i = 1; i <= test; ++i) {
//cout << "Case #" << i << ": ";
solve();
}
return 0;
}
Compilation message
rowords.cpp: In function 'void solve()':
rowords.cpp:70:28: error: expected ')' before 'rand'
70 | if(n * m * n <= 150000000 rand() & 1) continue;
| ~ ^~~~~
| )
