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Submission #643505

# Submission time Handle Problem Language Result Execution time Memory
643505 2022-09-22T08:18:40 Z BackNoob Retro (COCI17_retro) C++14
58 / 100
 403 ms 24524 KB 
#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define endl '\n'
#define MASK(i) (1LL << (i))
#define ull unsigned long long
#define ld long double
#define pb push_back
#define all(x) (x).begin() , (x).end()
#define BIT(x , i) ((x >> (i)) & 1)
#define TASK "task"
#define sz(s) (int) (s).size()

using namespace std;
const int mxN = 1e6 + 227;
const int inf = 1e9 + 277;
const int mod = 1e9 + 7;
const ll infll = 1e18 + 7;
const int base = 307;
const int LOG = 20;

template <typename T1, typename T2> bool minimize(T1 &a, T2 b) {
    if (a > b) {a = b; return true;} return false;
}
template <typename T1, typename T2> bool maximize(T1 &a, T2 b) {
    if (a < b) {a = b; return true;} return false;
}

int n;
int m;
char a[307][307];
int dp[2][307][307];
string trace[2][307][307];

void upd(string &a, string &b, char c = ' ')
{
    int cnt = 0;
    if(c != ' ') cnt = 1;
    else cnt = 0;
    if(sz(a) > sz(b) + cnt) return;
    if(sz(a) < sz(b) + cnt) {
        a = b;
        if(cnt > 0) a += c;
    }
    else {
        for(int i = 0; i < sz(a) - cnt; i++) {
            if(a[i] == b[i]) continue;
            if(a[i] > b[i]) {
                a = b;
                if(cnt > 0) a += c;
            }
            return;
        }
        if(cnt == 1) {
            if(a[sz(a) - 1] == c) return;
            if(a[sz(a) - 1] < c) {
                a = b;
                a += c;
            }
        }
    }
}

void solve()
{
    cin >> n >> m;
    for(int i = 1; i <= n; i++)
    for(int j = 1; j <= m; j++) cin >> a[i][j];

    pair<int, int> pos;
    for(int i = 1; i <= n; i++)
    for(int j = 1; j <= m; j++) if(a[i][j] == 'M') pos = make_pair(i, j);

    memset(dp, -0x3f, sizeof(dp));
    int tmp = dp[0][0][0];

    int res = 0;
    string ans = "";
    dp[n & 1][pos.se][0] = 0;
    for(int i = n; i > 1; i--) {
        int cur = (i & 1);
        int nxt = ((i - 1) & 1);
        for(int j = 1; j <= m; j++) {
            for(int k = 0; k <= n; k++) {
                if(dp[cur][j][k] == tmp) continue;
                for(int d = -1; d <= 1; d++) {
                    if(j + d >= 1 && j + d <= m) {
                        if(a[i - 1][j + d] == '*') {
                            if(k == 0) {
                                if(maximize(res, dp[cur][j][k]) == true || res == dp[cur][j][k]) {
                                    upd(ans, trace[cur][j][k]);
                                }
                            }
                            continue;
                        }
                        if(a[i - 1][j + d] == '(') {
                            if(maximize(dp[nxt][j + d][k + 1], dp[cur][j][k] + 1) == true || dp[nxt][j + d][k + 1] == dp[cur][j][k] + 1) {
                                upd(trace[nxt][j + d][k + 1], trace[cur][j][k], '(');
                            }
                        }
                        if(a[i - 1][j + d] == ')') {
                            if(k > 0) {
                                if(maximize(dp[nxt][j + d][k - 1], dp[cur][j][k] + 1) == true || dp[nxt][j + d][k - 1] == dp[cur][j][k] + 1)
                                    upd(trace[nxt][j + d][k - 1], trace[cur][j][k], ')');
                            }
                        }
                        if(a[i - 1][j + d] == '.') {
                            if(maximize(dp[nxt][j + d][k], dp[cur][j][k]) == true && dp[nxt][j + d][k] == dp[cur][j][k])
                                upd(trace[nxt][j + d][k], trace[cur][j][k]);
                        }
                    }
                }
                dp[cur][j][k] = tmp;
                trace[cur][j][k].clear();
            }
        }
    }

    int id = -1;
    for(int j = 1; j <= m; j++) {
        if(maximize(res, dp[1][j][0]) == true || res == dp[1][j][0]) {
            upd(ans, trace[1][j][0]);
        }
    }

    cout << res << endl;
    cout << ans;
}


int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen("task.inp", "r", stdin);
    //freopen("graph.out", "w", stdout);

    int tc = 1;
    //cin >> tc;
    while(tc--) {
        solve();
    }
    return 0;
}

Compilation message

retro.cpp: In function 'void solve()':
retro.cpp:120:9: warning: unused variable 'id' [-Wunused-variable]
  120 |     int id = -1;
      |         ^~

Subtask #1
58.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6868 KB Output is correct
2 Correct 3 ms 6868 KB Output is correct
3 Partially correct 3 ms 6868 KB Partially correct
4 Correct 4 ms 6868 KB Output is correct
5 Correct 5 ms 6868 KB Output is correct
6 Correct 8 ms 7240 KB Output is correct
7 Partially correct 7 ms 7252 KB Partially correct
8 Partially correct 7 ms 7124 KB Partially correct
9 Partially correct 9 ms 7308 KB Partially correct
10 Correct 10 ms 7380 KB Output is correct
11 Partially correct 280 ms 19788 KB Partially correct
12 Partially correct 251 ms 18356 KB Partially correct
13 Partially correct 107 ms 12432 KB Partially correct
14 Partially correct 88 ms 12140 KB Partially correct
15 Partially correct 396 ms 23964 KB Partially correct
16 Partially correct 324 ms 21292 KB Partially correct
17 Partially correct 300 ms 19808 KB Partially correct
18 Partially correct 265 ms 17700 KB Partially correct
19 Partially correct 403 ms 24524 KB Partially correct
20 Partially correct 318 ms 21288 KB Partially correct