This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define in(x) freopen(x, "r", stdin)
#define out(x) freopen(x, "w", stdout)
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")
#define F first
#define S second
#define pb push_back
#define M ll(1e9 + 7)
#define sz(x) (int)x.size()
#define re return
#define oo ll(1e18)
#define el '\n'
#define pii pair <int, int>
#define all(x) (x).begin(), (x).end()
#define arr_all(x, n) (x + 1), (x + 1 + n)
#define vi vector<int>
using namespace std;
typedef long long ll;
//using namespace __gnu_pbds;
//typedef tree <ll, null_type, less_equal <ll> , rb_tree_tag, tree_order_statistics_node_update> ordered_set;
//typedef long double ld;
typedef unsigned long long ull;
const int N = 310;
int f[N][N], n, m;
string s, t;
vector <int> in[300];
int main()
{
// mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());;
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
// in("pixels.in");
// out("pixels.out");
// in("input.txt");
// out("output.txt");
cin >> n >> m >> s >> t;
for (int i = 0; i < m; i++) {
for (int j = 0; j < n; j++)
f[i][j] = 1e9;
}
for (int i = 0; i < sz(s); i++) {
in[s[i]].pb(i);
if (s[i] == t[0])
f[0][i] = 0;
}
for (int i = 1; i < m; i++) {
for (int j = 0; j < sz(in[t[i - 1]]); j++) {
int p = in[t[i - 1]][j];
for (auto y : in[t[i - 1]]) {
int cnt = f[i - 1][p] + abs(p - y) + 1;
int np = max(0, y - 1);
if (s[np] == t[i]) {
f[i][np] = min(f[i][np], cnt);
}
np = min(n - 1, y + 1);
if (s[np] == t[i]) {
f[i][np] = min(f[i][np], cnt);
}
}
}
}
int mn = *min_element(f[m - 1], f[m - 1] + n);
cout << ((mn == 1e9) ? -1 : mn);
}
Compilation message (stderr)
bajka.cpp: In function 'int main()':
bajka.cpp:51:16: warning: array subscript has type 'char' [-Wchar-subscripts]
51 | in[s[i]].pb(i);
| ^
bajka.cpp:58:43: warning: array subscript has type 'char' [-Wchar-subscripts]
58 | for (int j = 0; j < sz(in[t[i - 1]]); j++) {
| ^
bajka.cpp:13:20: note: in definition of macro 'sz'
13 | #define sz(x) (int)x.size()
| ^
bajka.cpp:59:32: warning: array subscript has type 'char' [-Wchar-subscripts]
59 | int p = in[t[i - 1]][j];
| ^
bajka.cpp:61:38: warning: array subscript has type 'char' [-Wchar-subscripts]
61 | for (auto y : in[t[i - 1]]) {
| ^
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