Submission #335303

#	Time	Username	Problem	Language	Result	Execution time	Memory
335303		Vladth11	Nautilus (BOI19_nautilus)	C++14	66 / 100	96 ms	1004 KiB

nautilus

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define debug(x) cerr << #x << " " << x << "\n"
#define debug_with_space(x) cerr << #x << " " << x << " "

using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef pair <ll, ll> pii;
typedef pair <ll, pii> piii;
typedef tree <pii, null_type, less <pii>, rb_tree_tag, tree_order_statistics_node_update> OST;

const ll NMAX = 100001;
const ll INF = (1LL << 60);
const ll MOD = 1000000007;
const ll BLOCK = 101;
const ll nr_of_bits = 35;

bitset <501 * 501> init, b, nou, cop;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, m, t;
    cin >> n >> m >> t;
    int cc = 0;
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= m; j++){
            char c;
            cin >> c;
            if(c != '#'){
                cc++;
                init[i * (m + 2) + j + 1].flip();
            }
        }
    }
    string s;
    cin >> s;
    b = init;
    m+=2;
    n+=2;
    for(int i = 0; i < s.size(); i++){
        if(s[i] != '?'){
            if(s[i] == 'E'){
                b <<= 1;
            }else if(s[i] == 'W'){
                b >>= 1;
            }else if(s[i] == 'N'){
                b >>= m;
            }else{
                b <<= m;
            }
            b &= init;
        }else{
            cop = b;
            nou = b;
            nou <<= 1;
            nou &= init;
            b = nou;
            nou = cop;
            nou >>= 1;
            nou &= init;
            b |= nou;
            nou = cop;
            nou >>= m;
            nou &= init;
            b |= nou;
            nou = cop;
            nou <<= m;
            nou &= init;
            b |= nou;
            b &= init;
        }
    }
    cout << b.count();
    return 0;
}

Compilation message (stderr)

nautilus.cpp: In function 'int main()':
nautilus.cpp:44:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |     for(int i = 0; i < s.size(); i++){
      |                    ~~^~~~~~~~~~

• Subtask 1: 29 / 29
• Subtask 2: 37 / 37
• Subtask 3: 0 / 34