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Submission #643506

# Submission time Handle Problem Language Result Execution time Memory
643506 2022-09-22T08:19:33 Z BackNoob Retro (COCI17_retro) C++14
58 / 100
 437 ms 24548 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 4 ms 6868 KB Output is correct
3 Partially correct 4 ms 6868 KB Partially correct
4 Correct 4 ms 6868 KB Output is correct
5 Correct 3 ms 6868 KB Output is correct
6 Correct 8 ms 7244 KB Output is correct
7 Partially correct 8 ms 7252 KB Partially correct
8 Partially correct 6 ms 7124 KB Partially correct
9 Partially correct 10 ms 7412 KB Partially correct
10 Correct 12 ms 7380 KB Output is correct
11 Partially correct 309 ms 19840 KB Partially correct
12 Partially correct 225 ms 18380 KB Partially correct
13 Partially correct 110 ms 12528 KB Partially correct
14 Partially correct 87 ms 12072 KB Partially correct
15 Partially correct 435 ms 23764 KB Partially correct
16 Partially correct 333 ms 21344 KB Partially correct
17 Partially correct 381 ms 19784 KB Partially correct
18 Partially correct 218 ms 17696 KB Partially correct
19 Partially correct 437 ms 24548 KB Partially correct
20 Partially correct 308 ms 21204 KB Partially correct