Submission #18341403

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define n_l '\n'

#ifndef ONLINE_JUDGE
#define dbg(...) cout << "[" << #__VA_ARGS__ << "]: "; cout << to_string(__VA_ARGS__) << endl
template <typename T, size_t N> int SIZE(const T (&t)[N]){ return N; } template<typename T> int SIZE(const T &t){ return t.size(); } string to_string(const string s, int x1=0, int x2=1e9){ return '"' + ((x1 < s.size()) ? s.substr(x1, x2-x1+1) : "") + '"'; } string to_string(const char* s) { return to_string((string) s); } string to_string(const bool b) { return (b ? "true" : "false"); } string to_string(const char c){ return string({c}); } template<size_t N> string to_string(const bitset<N> &b, int x1=0, int x2=1e9){ string t = ""; for(int __iii__ = min(x1,SIZE(b)),  __jjj__ = min(x2, SIZE(b)-1); __iii__ <= __jjj__; ++__iii__){ t += b[__iii__] + '0'; } return '"' + t + '"'; } template <typename A, typename... C> string to_string(const A (&v), int x1=0, int x2=1e9, C... coords); int l_v_l_v_l = 0, t_a_b_s = 0; template <typename A, typename B> string to_string(const pair<A, B> &p) { l_v_l_v_l++; string res = "(" + to_string(p.first) + ", " + to_string(p.second) + ")"; l_v_l_v_l--; return res; } template <typename A, typename... C> string to_string(const A (&v), int x1, int x2, C... coords) { int rnk = rank<A>::value; string tab(t_a_b_s, ' '); string res = ""; bool first = true; if(l_v_l_v_l == 0) res += n_l; res += tab + "["; x1 = min(x1, SIZE(v)), x2 = min(x2, SIZE(v)); auto l = begin(v); advance(l, x1); auto r = l; advance(r, (x2-x1) + (x2 < SIZE(v))); for (auto e = l; e != r; e = next(e)) { if (!first) { res += ", "; } first = false; l_v_l_v_l++; if(e != l){ if(rnk > 1) { res += n_l; t_a_b_s = l_v_l_v_l; }; } else{ t_a_b_s = 0; } res += to_string(*e, coords...); l_v_l_v_l--; } res += "]"; if(l_v_l_v_l == 0) res += n_l; return res; } void dbgm(){;} template<typename Heads, typename... Tails> void dbgm(Heads H, Tails... T){ cout << to_string(H) << " | "; dbgm(T...); } 
#define dbgm(...) cout << "[" << #__VA_ARGS__ << "]: "; dbgm(__VA_ARGS__); cout << endl
#endif

#define pb push_back
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
#define sz(x) ((int)(x).size())
#define forn(i,n) for(int i=0;i<n;i++)
#define for1(i,n) for(int i=1;i<=n;i++)
typedef vector<int> vi;
typedef vector<ll> vl;
typedef pair<int,int> pii;
typedef double db;
typedef vector<vi> vvi;
const ll mod=1000000007;
const ll N=2005; //check this
int dx[] = {-1, 0, 1, 0, 1, 1, -1, -1};
int dy[] = {0, -1, 0, 1, 1, -1, 1, -1};

ll powmod(ll a,ll b) {ll res=1;a%=mod; assert(b>=0); for(;b;b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res;}
ll powb(ll a,ll b) {ll res=1;a ; assert(b>=0); for(;b;b>>=1){if(b&1)res=res*a;a=a*a;}return res;}
ll gcd(ll a,ll b) { return b?gcd(b,a%b):a;}

char a[N][N];

int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);

    // memset(dis, -1, sizeof dis);
    int n, m;
    cin >> n >> m;
    pii start, end;
    // vi port(26,INT_MAX);
    vector<vector<int>> dis(n + 1, vector<int> (m + 1, INT_MAX));
    vector<pii> port[26];
    forn(i,n)forn(j,m){
    	cin >> a[i][j];
    	if(a[i][j] == 'S')start = {i,j};
    	if(a[i][j] == 'G')end = {i,j};
    	if(a[i][j] >= 'a' && a[i][j] <='z')
    		port[a[i][j] - 'a'].pb({i,j});
    }
    queue<array<int,3>> q;
    q.push({start.fi, start.se, 0});
    dis[start.fi][start.se] = 0;
    while(!q.empty()){
    	auto to = q.front();
    	q.pop();
    	int x = to[0];
    	int y = to[1];
    	int d = to[2];
    	forn(k,4){
    		int xx = x + dx[k];
    		int yy = y + dy[k];
    		if(xx >= n || yy >= m || xx < 0 || yy < 0 || a[xx][yy] == '#')continue;
    		if(dis[xx][yy] <= d + 1)continue;
    		dis[xx][yy] = d + 1;
    		q.push({xx, yy, d + 1});
    	}
    	if(a[x][y] >= 'a' && a[x][y] <='z'){
    		int ch = a[x][y] - 'a';
    		for(auto pp : port[ch]){
    			if(dis[pp.fi][pp.se] <= d + 1){
    				continue;
    			}
    			dis[pp.fi][pp.se] = d + 1;
    			q.push({pp.fi, pp.se, d + 1});
    		}
    	}
    }

	// forn(i,n){
	// 	forn(j,m)
	// 		cout << dis[i][j] << " ";
	// 	cout << "\n";
	// }

    int ans = dis[end.fi][end.se];
    if(ans == INT_MAX)ans = -1;
    cout << ans;

}

Submission Info

Compile Error

./Main.cpp: In function ‘long long int powb(long long int, long long int)’:
./Main.cpp:30:30: warning: statement has no effect [-Wunused-value]
   30 | ll powb(ll a,ll b) {ll res=1;a ; assert(b>=0); for(;b;b>>=1){if(b&1)res=res*a;a=a*a;}return res;}
      |                              ^

Judge Result