Submission #921136

#	Time	Username	Problem	Language	Result	Execution time	Memory
921136		Whisper	Pohlepko (COCI16_pohlepko)	C++17	80 / 80	42 ms	21852 KiB

pohlepko

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;
using T = tuple<ll, ll, ll>;

#define int long long
#define Base 41
#define sz(a) (int)a.size()
#define FOR(i, a, b) for ( int i = a ; i <= b ; i++ )
#define FORD(i, a, b) for (int i = b; i >= a; i --)
#define REP(i, n) for (int i = 0; i < n; ++i)
#define REPD(i, n) for (int i = n - 1; i >= 0; --i)
#define all(x) x.begin() , x.end()
#define pii pair<int , int>
#define fi first
#define se second
#define Lg(x) 31 - __builtin_clz(x)

#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)

constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int MAX = 2e3 + 5;
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void setupIO(){
    #define name "Whisper"
    //Phu Trong from Nguyen Tat Thanh High School for gifted student
    srand(time(NULL));
    cin.tie(nullptr)->sync_with_stdio(false); cout.tie(nullptr);
    //freopen(name".inp", "r", stdin);
    //freopen(name".out", "w", stdout);
    cout << fixed << setprecision(10);
}

template <class X, class Y>
    bool minimize(X &x, const Y &y){
        X eps = 1e-9;
        if (x > y + eps) {x = y; return 1;}
        return 0;
    }

template <class X, class Y>
    bool maximize(X &x, const Y &y){
        X eps = 1e-9;
        if (x + eps < y) {x = y; return 1;}
        return 0;
    }

int N, M;
char a[MAX][MAX];
int vis[MAX][MAX];
pii ret[MAX][MAX];

const int dx[] = {1, 0};
const int dy[] = {0, 1};
void Whisper(){
    cin >> N >> M;
    FOR(i, 1, N) FOR(j, 1, M) cin >> a[i][j];
    vector<pii> q;
    q.emplace_back(1, 1);
    vis[1][1] = 1;
    while (!q.empty()){
        auto[x, y] = q.back();
        cout << a[x][y];
        char cur = 'z';
        vector<pii> nxt;
        for (auto&[rx, ry] : q){
            REP(dir, 2){
                int nx = rx + dx[dir];
                int ny = ry + dy[dir];
                if (nx > N || ny > M || vis[nx][ny]) continue;
                cur = min(cur, a[nx][ny]);
            }
        }
        for (auto&[rx, ry] : q){
            REP(dir, 2){
                int nx = rx + dx[dir];
                int ny = ry + dy[dir];
                if (nx > N || ny > M || vis[nx][ny] || a[nx][ny] != cur) continue;
                nxt.emplace_back(nx, ny);
                vis[nx][ny] = 1;
            }
        }
        swap(q, nxt);
    }
}


signed main(){
    setupIO();
    int Test = 1;
//    cin >> Test;
    for ( int i = 1 ; i <= Test ; i++ ){
        Whisper();
        if (i < Test) cout << '\n';
    }
}

• Subtask 1: 80 / 80