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답안 #961641

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
961641 2024-04-12T09:27:07 Z BhavayGoyal Growing Vegetable is Fun 3 (JOI19_ho_t3) C++14
100 / 100
 261 ms 134636 KB 
#include <bits/stdc++.h>
using namespace std;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

template<class T> using oset = 
            tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

#define ll long long
#define ld long double
#define ar array
#define vi vector<int>
#define vii vector<vector<int>>
#define pii pair<int, int>
#define pb push_back
#define all(x) x.begin(), x.end()
#define f first
#define s second
#define endl "\n"

const int MOD = 1e9+7;
const int inf = 1e9;
const ll linf = 1e18;

const int d4i[4]={-1, 0, 1, 0}, d4j[4]={0, 1, 0, -1};
const int d8i[8]={-1, -1, 0, 1, 1, 1, 0, -1}, d8j[8]={0, 1, 1, 1, 0, -1, -1, -1};

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());


// -------------------------------------------------- Main Code --------------------------------------------------

/*
YRGGRRGGYY

dp[i][red][green][yellow][prevCol] = dp[i+1][]

RYRGY
*/

const int N = 401;
int n, arr[N], countPrev[4][N], r = 0, g = 0, y = 0;;
vector<vector<vii>> dp;
vi pos[4];

int sol(int red, int green, int yellow, int prev) {
    int idx = (red+green+yellow+1);
    if (idx == n+1) return 0;
    if (red > r || green > g || yellow > y) return inf;
    
    if (dp[red][green][yellow][prev] != -1) return dp[red][green][yellow][prev];
    int ans = inf;
    for (int j = 1; j <= 3; j++) {
        if (j == prev) continue;
        int cost = inf;
        if (j == 1) {
            red++;
            if (red-1 < pos[j].size()) {
                int p = pos[j][red-1];
                cost = max(0, countPrev[2][p] -  green) + max(0, countPrev[3][p] -  yellow);
            }
        }
        if (j == 2) {
            green++;
            if (green-1 < pos[j].size()) {
                int p = pos[j][green-1];
                cost = max(0, countPrev[1][p] -  red) + max(0, countPrev[3][p] -  yellow);                
            }
        } 
        if (j == 3) {
            yellow++;
            if (yellow-1 < pos[j].size()) {
                int p = pos[j][yellow-1];
                cost = max(0, countPrev[2][p] -  green) + max(0, countPrev[1][p] -  red);
            }
        }
        ans = min(ans, sol(red, green, yellow, j) + cost);
        if (j == 1) red--; if (j == 2) green--; if (j == 3) yellow--;
    }
    return dp[red][green][yellow][prev] = ans;
}

void sol() {
    cin >> n;
    string s; cin >> s;
    for (int i = 0; i < n; i++) {
        if (s[i] == 'R') arr[i+1] = 1, r++;
        if (s[i] == 'G') arr[i+1] = 2, g++;
        if (s[i] == 'Y') arr[i+1] = 3, y++;
        pos[arr[i+1]].pb(i+1);
        countPrev[arr[i+1]][i+1] = 1;
    }

    dp = vector<vector<vii>>(r+1, vector<vii>(g+1, vii(y+1, vi(4, -1))));

    for (int j = 1; j <= 3; j++) {
        for (int i = 1; i <= n; i++) {
            countPrev[j][i] += countPrev[j][i-1];
        }
    }

    int ans = sol(0, 0, 0, 0);
    cout << (ans==inf?-1:ans) << endl;
}

int main () {
    auto begin = std::chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;    
    // cin >> t;
    for(int i = 1; i <= t; i++) 
    {
        sol();
    }
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
    return 0;
}

Compilation message

joi2019_ho_t3.cpp: In function 'int sol(int, int, int, int)':
joi2019_ho_t3.cpp:60:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |             if (red-1 < pos[j].size()) {
      |                 ~~~~~~^~~~~~~~~~~~~~~
joi2019_ho_t3.cpp:67:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |             if (green-1 < pos[j].size()) {
      |                 ~~~~~~~~^~~~~~~~~~~~~~~
joi2019_ho_t3.cpp:74:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |             if (yellow-1 < pos[j].size()) {
      |                 ~~~~~~~~~^~~~~~~~~~~~~~~
joi2019_ho_t3.cpp:80:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   80 |         if (j == 1) red--; if (j == 2) green--; if (j == 3) yellow--;
      |         ^~
joi2019_ho_t3.cpp:80:28: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   80 |         if (j == 1) red--; if (j == 2) green--; if (j == 3) yellow--;
      |                            ^~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 604 KB Output is correct
17 Correct 1 ms 460 KB Output is correct

Subtask #2
55.0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 604 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 860 KB Output is correct
19 Correct 1 ms 964 KB Output is correct
20 Correct 1 ms 860 KB Output is correct
21 Correct 1 ms 860 KB Output is correct
22 Correct 1 ms 860 KB Output is correct
23 Correct 1 ms 860 KB Output is correct
24 Correct 1 ms 860 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 1 ms 856 KB Output is correct
28 Correct 1 ms 900 KB Output is correct
29 Correct 2 ms 812 KB Output is correct
30 Correct 1 ms 856 KB Output is correct
31 Correct 1 ms 856 KB Output is correct
32 Correct 1 ms 860 KB Output is correct
33 Correct 1 ms 604 KB Output is correct
34 Correct 1 ms 600 KB Output is correct
35 Correct 1 ms 860 KB Output is correct
36 Correct 1 ms 860 KB Output is correct
37 Correct 1 ms 860 KB Output is correct
38 Correct 1 ms 860 KB Output is correct
39 Correct 1 ms 860 KB Output is correct
40 Correct 1 ms 348 KB Output is correct
41 Correct 1 ms 464 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 4 ms 3932 KB Output is correct
3 Correct 4 ms 3932 KB Output is correct
4 Correct 3 ms 3932 KB Output is correct
5 Correct 3 ms 3932 KB Output is correct
6 Correct 4 ms 3932 KB Output is correct
7 Correct 4 ms 3932 KB Output is correct
8 Correct 3 ms 3932 KB Output is correct
9 Correct 4 ms 3932 KB Output is correct
10 Correct 4 ms 3824 KB Output is correct
11 Correct 4 ms 3932 KB Output is correct
12 Correct 1 ms 1372 KB Output is correct
13 Correct 2 ms 1932 KB Output is correct
14 Correct 2 ms 2660 KB Output is correct
15 Correct 6 ms 3932 KB Output is correct
16 Correct 4 ms 3992 KB Output is correct

Subtask #4
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 604 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 860 KB Output is correct
19 Correct 1 ms 964 KB Output is correct
20 Correct 1 ms 860 KB Output is correct
21 Correct 1 ms 860 KB Output is correct
22 Correct 1 ms 860 KB Output is correct
23 Correct 1 ms 860 KB Output is correct
24 Correct 1 ms 860 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 1 ms 856 KB Output is correct
28 Correct 1 ms 900 KB Output is correct
29 Correct 2 ms 812 KB Output is correct
30 Correct 1 ms 856 KB Output is correct
31 Correct 1 ms 856 KB Output is correct
32 Correct 1 ms 860 KB Output is correct
33 Correct 1 ms 604 KB Output is correct
34 Correct 1 ms 600 KB Output is correct
35 Correct 1 ms 860 KB Output is correct
36 Correct 1 ms 860 KB Output is correct
37 Correct 1 ms 860 KB Output is correct
38 Correct 1 ms 860 KB Output is correct
39 Correct 1 ms 860 KB Output is correct
40 Correct 1 ms 348 KB Output is correct
41 Correct 1 ms 464 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 4 ms 3932 KB Output is correct
44 Correct 4 ms 3932 KB Output is correct
45 Correct 3 ms 3932 KB Output is correct
46 Correct 3 ms 3932 KB Output is correct
47 Correct 4 ms 3932 KB Output is correct
48 Correct 4 ms 3932 KB Output is correct
49 Correct 3 ms 3932 KB Output is correct
50 Correct 4 ms 3932 KB Output is correct
51 Correct 4 ms 3824 KB Output is correct
52 Correct 4 ms 3932 KB Output is correct
53 Correct 1 ms 1372 KB Output is correct
54 Correct 2 ms 1932 KB Output is correct
55 Correct 2 ms 2660 KB Output is correct
56 Correct 6 ms 3932 KB Output is correct
57 Correct 4 ms 3992 KB Output is correct
58 Correct 247 ms 133376 KB Output is correct
59 Correct 248 ms 133572 KB Output is correct
60 Correct 253 ms 132512 KB Output is correct
61 Correct 252 ms 133972 KB Output is correct
62 Correct 12 ms 12564 KB Output is correct
63 Correct 19 ms 20828 KB Output is correct
64 Correct 78 ms 66788 KB Output is correct
65 Correct 148 ms 95568 KB Output is correct
66 Correct 246 ms 131792 KB Output is correct
67 Correct 259 ms 131920 KB Output is correct
68 Correct 229 ms 133716 KB Output is correct
69 Correct 245 ms 134636 KB Output is correct
70 Correct 261 ms 134344 KB Output is correct
71 Correct 248 ms 131192 KB Output is correct
72 Correct 35 ms 34092 KB Output is correct
73 Correct 11 ms 10584 KB Output is correct