oj.uz

Submission #366408

# Submission time Handle Problem Language Result Execution time Memory
366408 2021-02-14T06:49:17 Z ne4eHbKa Bajka (COCI20_bajka) C++17
70 / 70
 104 ms 396 KB 
#include <bits/stdc++.h>
using namespace std;
#ifndef _LOCAL
//#pragma GCC optimize("O3,Ofast")
#else
#pragma GCC optimize("O0")
#endif
template<typename t> inline void umin(t &a, const t b) {a = min(a, b);}
template<typename t> inline void umax(t &a, const t b) {a = max(a, b);}
typedef pair<int, int> pii;
typedef long long ll;
typedef long double ld;
ll time() {return chrono::system_clock().now().time_since_epoch().count();}
mt19937 rnd(time());
#define ft first
#define sd second
#define len(f) int((f).size())
#define bnd(f) (f).begin(), (f).end()
#define _ <<' '<<
const int inf = 1e9 + 5;
const ll inf64 = 4e18 + 5;
const int md = 998244353;
namespace MD {
    void add(int &a, const int b) {if((a += b) >= md) a -= md;}
    void sub(int &a, const int b) {if((a -= b) < 0) a += md;}
    int prod(const int a, const int b) {return ll(a) * b % md;}
};

int n, m;
string s, t;
const int N = 303;
int f[N], g[N];
bool first;

void letter(char c) {
    if(first) {
        first = false;
        for(int i = 0; i < n; ++i)
            if(s[i] != c) f[i] = +inf;
        return;
    }
    fill(g, g + n, +inf);
    for(int i = 0; i < n; ++i)
        for(int j = 0; j < n; ++j)
            if(i != j && s[i] == s[j]) {
                if(i)
                    umin(g[i - 1], 1 + f[j] + abs(i - j));
                if(i + 1 < n)
                    umin(g[i + 1], 1 + f[j] + abs(i - j));
            }
    for(int i = 0; i < n; ++i) {
        if(i) umin(g[i], f[i - 1] + 1);
        if(i + 1 < n) umin(g[i], f[i + 1] + 1);
        if(s[i] != c) g[i] = +inf;
    }
    memcpy(f, g, n << 2);
}

void solve() {
    first = true;
    cin >> n >> m >> s >> t;
    memset(f, 0, n << 2);
    for(char c : t) letter(c);
    int ans = *min_element(f, f + n);
    if(ans >= +inf) ans = -1;
    cout << ans << endl;
}

int main() {
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#ifndef _LOCAL
//    freopen("file.in", "r", stdin);
//    freopen("file.out", "w", stdout);
#else
    system("color a");
    freopen("in.txt", "r", stdin);
    int t; cin >> t;
    while(t--)
#endif
    solve();
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct

Subtask #2
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 364 KB Output is correct
2 Correct 58 ms 364 KB Output is correct
3 Correct 41 ms 384 KB Output is correct
4 Correct 44 ms 364 KB Output is correct
5 Correct 3 ms 364 KB Output is correct
6 Correct 4 ms 364 KB Output is correct
7 Correct 54 ms 364 KB Output is correct
8 Correct 67 ms 364 KB Output is correct
9 Correct 104 ms 364 KB Output is correct
10 Correct 2 ms 364 KB Output is correct
11 Correct 54 ms 396 KB Output is correct