Submission #643528

#	Time	Username	Problem	Language	Result	Execution time	Memory
643528		BackNoob	Retro (COCI17_retro)	C++14	40 / 100	123 ms	113772 KiB

retro

#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[307][307][307];

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));

    for(int j = 1; j <= m; j++) {
        if(a[1][j] == ')') dp[1][j][1] = 1;
        if(a[1][j] == '*') dp[1][j][0] = 0;
        if(a[1][j] == '.') dp[1][j][0] = 0;
    }

    int res = 0;
    for(int i = 1; i < n; i++) {
        for(int j = 1; j <= m; j++) {
            if(a[i][j] == '*') dp[i][j][0] = 0;
            for(int k = 0; k <= n; k++) {
                if(dp[i][j][k] == dp[0][0][0]) continue;
                for(int d = -1; d <= 1; d++) {
                    if(j + d >= 1 && j + d <= m) {
                        if(a[i + 1][j + d] == ')') {
                            maximize(dp[i + 1][j + d][k + 1], dp[i][j][k] + 1);
                        }
                        if(a[i + 1][j + d] == '(') {
                            if(k > 0)
                                maximize(dp[i + 1][j + d][k - 1], dp[i][j][k] + 1);
                        }
                        if(a[i + 1][j + d] == '.' || a[i + 1][j + d] == 'M') {
                            maximize(dp[i + 1][j + d][k], dp[i][j][k]);
                        }
                    }
                }
            }
        }
    }

    cout << dp[n][pos.se][0] << endl;
    for(int i = 0; i < dp[n][pos.se][0]; i++) cout << '(';
}


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 (stderr)

retro.cpp: In function 'void solve()':
retro.cpp:53:9: warning: unused variable 'res' [-Wunused-variable]
   53 |     int res = 0;
      |         ^~~

• Subtask 1: 40 / 100