Submission #1023177

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023177		vahagng	Awesome Arrowland Adventure (eJOI19_adventure)	C++17	22 / 100	1 ms	348 KiB

adventure

//----------vahagng----------//
#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
using namespace std;
// using namespace __gnu_pbds;

// template <class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

// Defines

#define ll long long
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define pii pair<int, int>
#define ppb pop_back
#define pb push_back
#define mii map<int, int>
#define mll map<long long, long long>
#define no_ans cout << -1 << '\n';
#define YES cout << "YES\n";
#define NO cout << "NO\n";
#define ok cout << "OK\n";
#define ld long double
#define sz(v) v.size()
#define endl '\n'

// Constants 

const int N = 2e5+10, M = 3e5+10;
const ll inf = 1e18, mod = 1e9+7, mod1 = 998244353;

// Functions

void SetIO(string str = "") {
    if (str != "") {
        freopen((str + ".in").c_str(), "r", stdin);
        freopen((str + ".out").c_str(), "w", stdout);
    } else {
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    }
}
 
void FastIO() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
}

ll add(ll a, ll b)
{
    return (a + b)%mod;
}

ll mult(ll a, ll b)
{
    return (a%mod * b%mod)%mod;
}

ll sub(ll a, ll b)
{
    return (a - b + 2*mod)%mod;
}

long long binpower(long long a, long long n) {
	if(n == 0) {
		return 1;
	}
 
	if(n == 1) {
		return a;
	}
 
	if(n % 2 == 1) {
		long long curr = binpower(a, n / 2);
		curr = mult(curr, curr);
		curr = mult(a, curr);
		return curr;
	} else {
		long long curr = binpower(a, n / 2);
		return mult(curr, curr);
	}
}



// const int N = 2e5 + 10;
// int n;
// pair<int,int>max_dist;
// vector<int>adj[N];
// int dists[N];

// void dfs(int node, int parent, int dist) 
// {
//     dists[node] = max(dists[node], dist);
// 	if(dist > max_dist.first) 
//     {
// 		max_dist = {dist, node};
// 	}
 
// 	for(auto i: adj[node]) 
//     {
// 		if(i == parent) continue;
// 		dfs(i, node, dist + 1);
// 	}
// }
 
// pair<int, int> get_farthest_distance(int node) 
// {
// 	max_dist = {-1, -1};
// 	dfs(node, -1, 0);
// 	return max_dist;
// }

void precision(int x)
{
	cout.setf(ios::fixed | ios::showpoint);
	cout.precision(x);
	return;
}

ll countSubstring(const string str, const string sub)
{
	if (sub.length() == 0) return 0;
	ll count = 0;
	for(int i = 0; i < str.size() - sub.size() + 1; i++) 
    {
        int okk = 1;
        for(int j = i; j < i + sub.size(); j++) 
        {
            if(str[j] != sub[j - i]) 
            {
                okk = 0;
                break;
            }
        }
        count += okk;
    }
    return count;
}

ll ceil_division(ll a, ll b)
{
    return (a + b - 1) / b;
}

ll max_subarray_sum(vector<ll>& v, int n)
{
    ll a = INT64_MIN, b = 0;
    for(int i = 0; i < n; i++)
    {
        b += v[i];
        if(b > a)
        {
            a = b;
        }
        if(b<0)
        {
            b = a;
        }
    }
    return a;
}

//Solution

int n, m, dist[505][505];
char c[505][505];
int dx[] = {1, 0, 0, -1};
int dy[] = {0, 1, -1, 0};
map<char,int>mp;
bool visited[505][505];
int dir[] = {1, 2, 3, 4};
int a[505][505];

int f(char c)
{
    if(c == 'N') return 1;
    if(c == 'E') return 2;
    if(c == 'S') return 3;
    if(c == 'W') return 4;
    return 5;
}

void solve(int tc)
{
    cin >> n >> m;
    for(int i = 1; i <= n; i++)
    {
        for(int j = 1; j <= m; j++)
        {
            cin >> c[i][j];
            a[i][j] = f(c[i][j]);
        }
    }
    priority_queue<pair<int,pair<int,int> >, vector<pair<int,pair<int,int> > >, greater<pair<int,pair<int,int> > > > pq;
    pq.push(make_pair(0, make_pair(1,  1)));
    for(int i = 1; i <= n; i++)
    {
        for(int j = 1; j <= m; j++)
        {
            dist[i][j] = INT_MAX;
        }
    }
    dist[1][1] = 0;
    while(!pq.empty())
    {
        int cnt = pq.top().first;
        int i = pq.top().second.first;
        int j = pq.top().second.second;
        pq.pop();
        if(visited[i][j]) continue;
        visited[i][j] = true;
        for(int k = 0; k < 4; k++)
        {
            int x = i + dx[k], y = j + dy[k];
            if(x >  n|| y >m|| x <1|| y < 1)continue;
            if(a[x][y]==0) continue;
            if(a[x][y]==5&& (x!= n ||y!=m)) continue;
            int cnt1 = ((dir[k] - a[i][j]) + 4)%4;
            if(cnt1 + cnt < dist[x][y])
            {
                dist[x][y] = cnt + cnt1;
                pq.push(make_pair(cnt1 + cnt, make_pair(x, y)));
            }
        }
    }
    cout << (dist[n][m] == INT_MAX ? -1 : dist[n][m]) << endl;
}

void precalc()
{
  
}

int main() {
    // SetIO("");
    FastIO();
    int test_case = 1;
    // cin >> test_case;
    precalc();
    int cnt = 1;
    while (test_case--)
    {
      solve(cnt++);
    }
    return 0;
}

Compilation message (stderr)

adventure.cpp: In function 'long long int countSubstring(std::string, std::string)':
adventure.cpp:127:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  127 |  for(int i = 0; i < str.size() - sub.size() + 1; i++)
      |                 ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
adventure.cpp:130:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  130 |         for(int j = i; j < i + sub.size(); j++)
      |                        ~~^~~~~~~~~~~~~~~~
adventure.cpp: In function 'void SetIO(std::string)':
adventure.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen((str + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
adventure.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen((str + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
adventure.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
adventure.cpp:41:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 0 / 12
• Subtask 4: 0 / 16
• Subtask 5: 0 / 50