Submission #318678

#	Time	Username	Problem	Language	Result	Execution time	Memory
318678		ignaciocanta	Jetpack (COCI16_jetpack)	C++14	80 / 80	31 ms	20696 KiB

jetpack

#include <bits/stdc++.h>
 
using namespace std;
 
using tint = long long;
using ld = long double;
 
#define forsn(i, s, n) for(int i = s; i < int(n); i++)
#define forn(i, n) forsn(i, 0, n)
 
using vi = vector<int>;
#define pb push_back
#define rsz resize
#define all(x) begin(x), end(x)
#define rall(x) x.rbegin(), x.rend() 
#define sz(x) (int)(x).size()
 
using pi = pair<int,int>;
#define f first
#define s second
#define mp make_pair
 
#define DBG(x) cerr << #x << " = " << x << endl;
 
const int MOD = 1e9+7;
const int MX = 2e5+5;
const tint INF = 2e18;
const int inf = 2e9;
const ld PI = acos(ld(-1)); 
 
void NACHO(string name = "protesta"){
    ios_base::sync_with_stdio(0); cin.tie(0);
   // freopen((name+".in").c_str(), "r", stdin);
    //freopen((name+".out").c_str(), "w", stdout);
}
 
const int dx[4] = {1, -1, 0, 0};
const int dy[4] = {0, 0, 1, -1};

const int moveX[] = {-1, 1, 0};
const int moveY[] = {1, 1, 1};
 
bool valid(int x, int y, int n, int m){
	return (0<=x && x<n && 0<=y && y<m);
}

const int NN = 11;
const int MM = 1e5+1;

bool visited[NN][MM];
pi vengo[NN][MM];
string tab[NN];

void dfs(int x, int y, int m){
	//cout << x << " " << y << endl;
	visited[x][y] = 1;
	forn(k, 2){
		int _x = x+moveX[k], _y = y+moveY[k];
		if(valid(_x, _y, 10, m) && !visited[_x][_y] && tab[_x][_y] == '.'){
			vengo[_x][_y] = mp(x, y);
			dfs(_x, _y, m);
		}
	}
	if(x == 9 || x == 0){
		int _x = x+moveX[2], _y = y+moveY[2];
		if(valid(_x, _y, 10, m) && !visited[_x][_y] && tab[_x][_y] == '.'){
			vengo[_x][_y] = mp(x, y);
			dfs(_x, _y, m);
		}
	}
}

int main(){
	NACHO();
	int n; cin >> n;
	forn(i, 10) forn(j, n) vengo[i][j] = mp(-1, -1);
	forn(i, 10) cin >> tab[i];
	dfs(9, 0, n);
	forn(j, 10){
		if(visited[j][n-1]){
			int X = j, Y = n-1;
			vector<pi> move;
			vector<pi> ret;
			while(!(X == -1 && Y == -1)){
				move.pb(mp(X, Y));
				auto u = vengo[X][Y];
				X = u.f; Y = u.s;
			}
			reverse(all(move));
			forn(i, sz(move)){
				
				int j = i+1;
				bool e = 0;
				while(j < sz(move) && ((move[j].f == move[j-1].f && move[j].f == 0) || (move[j].f < move[j-1].f))){
					e = 1;
					j++;
				}
				--j;
				//cout << i << " " << j << endl;
				if(e){
					//cout << i << " " << j << endl;
					ret.pb(mp(i, j-i));
				}
				i = j;
			}
			cout << sz(ret) << "\n";
			for(auto u : ret){
				cout << u.f << " " << u.s << "\n";
			}
			return 0;
		}
	}
}

• Subtask 1: 80 / 80