Submission #1181645

#	Time	Username	Problem	Language	Result	Execution time	Memory
1181645		rythm_of_knight	Lamps (JOI19_lamps)	C++17	0 / 100	1094 ms	12100 KiB

lamp

#include <bits/stdc++.h>
#define ar array
#define all(x) x.begin(), x.end()
using namespace std;
typedef long long ll;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    int n;
    cin >> n;
    vector <int> a(n + 1), b(n + 1);
    for (int i = 1; i <= n; i++) {
        char c; cin >> c;
        a[i] = c - '0';
    }
    for (int i = 1; i <= n; i++) {
        char c; cin >> c;
        b[i] = c - '0';
    }
    vector <int> dp(n + 1, 1e9);
    dp[0] = 0;
    for (int i = 1; i <= n; i++) {
        vector <int> cnt(3, 1), c(3);
        int now = 2, nw = 2, eq = 0;
        for (int j = i; j >= 1; j--) {
            if (b[j] != now)
                cnt[b[j]]++;
            now = b[j];
            if (a[j] == b[j]) {
                if (b[j] != nw)
                    c[b[j]]++;
                nw = b[j];
            } else {
                eq = 1e9;
                nw = 2;
            }
            dp[i] = min(dp[i], dp[j - 1] + min(min(cnt[0], cnt[1]), min(eq, c[0] + c[1] + 1)));
        }
    }
    cout << dp[n];
}

• Subtask 1: 0 / 6
• Subtask 2: 0 / 41
• Subtask 3: 0 / 4
• Subtask 4: 0 / 49