Submission #236105

#	Time	Username	Problem	Language	Result	Execution time	Memory
236105		ne4eHbKa	Retro (COCI17_retro)	C++17	55 / 100	282 ms	222712 KiB

retro

//{ <defines>
#include <bits/stdc++.h>
using namespace std;

//#pragma comment(linker, "/stack:200000000")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
//#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,-O3")

#define fr(i, n) for(int i = 0; i < n; ++i)
#define fo(n) fr(i, n)

#define re return
#define ef else if
#define ifn(x) if(!(x))
#define _  << ' ' <<

#define ft first
#define sd second
#define ve vector
#define pb push_back
#define eb emplace_back

#define sz(x) int((x).size())
#define bnd(x) x.begin(), x.end()
#define clr(x, y) memset((x), (y), sizeof (x))

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef ve<int> vi;

inline ll time() {re chrono :: system_clock().now().time_since_epoch().count();}
mt19937 rnd(time());
mt19937_64 RND(time());

template<typename t> inline void umin(t &a, t b) {a = min(a, b);}
template<typename t> inline void umax(t &a, t b) {a = max(a, b);}

int md = 998244353;

inline int m_add(int&a, int b) {a += b; if(a < 0) a += md; if(a >= md) a -= md; re a;}
inline int m_sum(int a, int b) {a += b; if(a < 0) a += md; if(a >= md) a -= md; re a;}
inline int m_mul(int&a, int b) {re a = 1ll * a * b % md;}
inline int m_prod(int a, int b) {re 1ll * a * b % md;}

int m_bpow(ll A, ll b) {
    int a = A % md;
    ll ans = 1;
    for(ll p = 1ll << 63 - __builtin_clzll(b); p; p >>= 1) {
        (ans *= ans) %= md;
        if(p & b)
            (ans *= a) %= md;
    }
    re ans;
}

//const ld pi = arg(complex<ld>(-1, 0));
//const ld pi2 = pi + pi;
const int oo = 2e9;
const ll OO = 4e18;
//} </defines>
const int N = 305;

int f[N][N][N];
int pr[N][N][N];
string s[N];

int n, m;

pair<int, char> c(int i, int j, int b) {
    if(j >= 0 && j < m && (i < 0 || s[i][j] == '*') && !b) re {0, '#'};
    if(i < 0 || j < 0 || j >= m || b < 0 || b > i + 1 || s[i][j] == '*') re {-1, '!'};
    int &ans = f[i][j][b], &p = pr[i][j][b];
    if(ans < oo) re {ans, p};
    bool br = false;
    if(s[i][j] == ')') --b, br = true;
    if(s[i][j] == '(') ++b, br = true;
    ans = p = -1;
    char e = '!';
    for(int z = j - 1; z <= j + 1; ++z) {
        auto v = c(i - 1, z, b);
        if(~v.ft) {
            int u = v.ft + br;
            if(u > ans || u == ans && v.sd == '(') {
                ans = u;
                e = v.sd;
                p = z;
            }
        }
    }
    if(s[i][j] == '(') e = '(';
    if(s[i][j] == ')') e = ')';
    re {ans, e};
}

void ans(int i, int j, int b) {
    if(i < 0 || s[i][j] == '*') re;
    if(s[i][j] != '.' && s[i][j] != 'M') cout << s[i][j];
    ans(i - 1, pr[i][j][b], b + (s[i][j] == '(' ? +1 : s[i][j] == ')' ? -1 : 0));
}

void solve() {
    clr(f, 127);
    clr(pr, -1);
    cin >> n >> m;
    fo(n) cin >> s[i];
    int M {};
    for(int i = 0; i < m; ++i) if(s[n - 1][i] == 'M') M = i;
    int v = c(n - 1, M, 0).ft, b = 0;
    cout << v << endl;
    ans(n - 1, M, 0);
    cout << endl;
}

int main() {
#ifdef _LOCAL
    freopen("in.txt", "r", stdin);
    int tests; cin >> tests;
    for(int test = 1; test <= tests; ++test) {
		cerr << "case #" << test << endl;
        solve();
        cerr << endl;
    }
#else
//    freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout);
    ios_base :: sync_with_stdio(0); cin.tie(0); cout.tie(0);
    solve();
#endif
    return 0;
}

Compilation message (stderr)

retro.cpp: In function 'int m_bpow(ll, ll)':
retro.cpp:50:26: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
     for(ll p = 1ll << 63 - __builtin_clzll(b); p; p >>= 1) {
                       ~~~^~~~~~~~~~~~~~~~~~~~
retro.cpp: In function 'std::pair<int, char> c(int, int, int)':
retro.cpp:85:36: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
             if(u > ans || u == ans && v.sd == '(') {
                           ~~~~~~~~~^~~~~~~~~~~~~~
retro.cpp: In function 'void solve()':
retro.cpp:110:32: warning: unused variable 'b' [-Wunused-variable]
     int v = c(n - 1, M, 0).ft, b = 0;
                                ^

• Subtask 1: 55 / 100