Submission #168617

#	Time	Username	Problem	Language	Result	Execution time	Memory
168617		srvlt	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++14	0 / 100	5 ms	3320 KiB

joi2019_ho_t3

//#pragma GCC target ("avx2,sse2")
//#pragma GCC optimization ("Ofast")
//#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

#define ordered_set tree <pair <ll, int>, null_type, less <pair <ll, int> >, rb_tree_tag, tree_order_statistics_node_update>
#define ll long long
#define ull unsigned long long
#define db double
#define pb push_back
#define pf push_front
#define ppb pop_back
#define ppf pop_front
#define fi first
#define se second
#define mp make_pair
#define up_b upper_bound
#define low_b lower_bound
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()
#define endl "\n"

#define left fsdsdfoisf
#define sum dpsdfioppsf
#define assign xcvjlkdjfio
#define trie fksdfkjkfnjuiv
#define next sidlfjsfkl
#define merge sdfksdkfsldf

//#define int long long

using namespace std;

void dout() {
    cerr << endl;
}
template <typename Head, typename... Tail>
void dout(Head H, Tail... T) {
    cerr << H << ' ';
    dout(T...);
}

//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef pair <int, int> pii;

const int N = 63, inf = 1e9;
int n, R, G, Y, dp[3][N][N][N];
string s;
vector <int> r, g, y;

void solve(int tc) {
    // check for (int i = 0; i < n; j++)
    cin >> n >> s;
    for (int i = 1; i <= n; i++) {
        if (s[i - 1] == 'R') {
            r.pb(i);
        }   else if (s[i - 1] == 'G') {
            g.pb(i);
        }   else {
            y.pb(i);
        }
    }
    R = sz(r), G = sz(g), Y = sz(y);
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            for (int k = 0; k < N; k++) {
                for (int l = 0; l < 3; l++) {
                    dp[l][i][j][k] = inf;
                }
            }
        }
    }
    for (int i = 0; i < 3; i++) {
        dp[i][0][0][0] = 0;
    }
    for (int i = 1; i <= n; i++) {
        for (int j = 0; j <= min(i, R); j++) {
            for (int k = 0; k <= min(i - j, G); k++) {
                int h = i - j - k;
                if (h > Y) {
                    continue;
                }
                for (int l = 0; l < 3; l++) {
                    int res = inf;
                    if (l == 0 && j > 0) {
                        res = min(res, dp[1][j - 1][k][h]);
                        res = min(res, dp[2][j - 1][k][h]);
                        res += abs(r[j - 1] - i);
                    }   else if (l == 1 && k > 0) {
                        res = min(res, dp[0][j][k - 1][h]);
                        res = min(res, dp[2][j][k - 1][h]);
                        res += abs(g[k - 1] - i);
                    }   else if (l == 2 && h > 0) {
                        res = min(res, dp[0][j][k][h - 1]);
                        res = min(res, dp[1][j][k][h - 1]);
                    }
                    dp[l][j][k][h] = res;
                }
            }
        }
    }
    int res = inf;
    for (int i = 0; i < 3; i++) {
        res = min(res, dp[i][R][G][Y]);
    }
    if (res == inf) {
        cout << -1;
    }   else {
        cout << res;
    }
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
//    freopen("meetings.in", "r", stdin);
//    freopen("meetings.out", "w", stdout);
    int tc = 1;
//    cin >> tc;
    for (int i = 0; i < tc; i++) {
        solve(i);
//        cleanup();
    }
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 55
• Subtask 3: 0 / 15
• Subtask 4: 0 / 25