Submission #320886

#	Time	Username	Problem	Language	Result	Execution time	Memory
320886		dolphingarlic	Bajka (COCI20_bajka)	C++14	70 / 70	26 ms	364 KiB

bajka

#include <bits/stdc++.h>
typedef long long ll;
using namespace std;

int dp[2][300];

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, m;
    string s, t;
    vector<int> pos;
    cin >> n >> m >> s >> t;
    for (int i = 0; i < n; i++) if (s[i] == t[0]) pos.push_back(i);
    for (int i = 1; i < m; i++) {
        pos.clear();
        for (int j = 0; j < n; j++) if (s[j] == t[i]) {
            pos.push_back(j);
            dp[i & 1][j] = INT_MAX / 2;
            if (j && s[j - 1] == t[i - 1]) {
                dp[i & 1][j] = min(dp[i & 1][j], dp[i - 1 & 1][j - 1] + 1);
            }
            if (j < n - 1 && s[j + 1] == t[i - 1]) {
                dp[i & 1][j] = min(dp[i & 1][j], dp[i - 1 & 1][j + 1] + 1);
            }
        }
        for (int j : pos) for (int k : pos) dp[i & 1][j] = min(dp[i & 1][j], dp[i & 1][k] + abs(k - j));
    }

    int ans = INT_MAX / 2;
    for (int i : pos) ans = min(ans, dp[m - 1 & 1][i]);
    if (ans == INT_MAX / 2) cout << -1;
    else cout << ans;
    return 0;
}

Compilation message (stderr)

bajka.cpp: In function 'int main()':
bajka.cpp:21:55: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   21 |                 dp[i & 1][j] = min(dp[i & 1][j], dp[i - 1 & 1][j - 1] + 1);
      |                                                     ~~^~~
bajka.cpp:24:55: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   24 |                 dp[i & 1][j] = min(dp[i & 1][j], dp[i - 1 & 1][j + 1] + 1);
      |                                                     ~~^~~
bajka.cpp:31:43: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   31 |     for (int i : pos) ans = min(ans, dp[m - 1 & 1][i]);
      |                                         ~~^~~

• Subtask 1: 20 / 20
• Subtask 2: 50 / 50