Submission #725837

#	Time	Username	Problem	Language	Result	Execution time	Memory
725837		YugiHacker	Jetpack (COCI16_jetpack)	C++14	80 / 80	28 ms	6612 KiB

jetpack

/*
	www.youtube.com/YugiHackerChannel
	oj.vnoi.info/user/YugiHackerKhongCopCode
*/
#include<bits/stdc++.h>
#define el cout<<"\n"
#define f0(i,n) for(int i=0;i<n;++i)
#define f1(i,n) for(int i=1;i<=n;++i)
#define maxn 100005
#define pii pair<int,int>
#define fi first
#define se second
using namespace std;
int n, d[12][maxn], r;
char a[12][maxn];
queue <pii> q;
main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n;
    f1 (i, 10) f1 (j, n) cin >> a[i][j];
    q.push({10, 1});
    while (q.size())
    {
        int u = q.front().fi, v = q.front().se;
        if (v == n) r = u;
        q.pop();
        int u_up = max(1, u-1);
        int u_down = min(10, u+1);
        if (a[u_up][v+1] == '.' && d[u_up][v+1] == 0)
        {
            q.push({u_up, v+1});
            d[u_up][v+1] = u;
        }
        if (a[u_down][v+1] == '.' && d[u_down][v+1] == 0)
        {
            q.push({u_down, v+1});
            d[u_down][v+1] = u;
        }
    }
    //f1 (i, 10) {f1 (j, n) if (d[i][j]) cout << '*'; else cout << '.'; el;}
    vector <pii> ans;
    for (int i=n; i; i--)
    {
        int cnt = 0;
        //cout << r << ' ' << i, el;
        while (d[r][i] == r+1 || (r == 1  && d[r][i] == 1))
        {
            ++cnt;
            r = d[r][i];
            //cout << r << ' ' << i, el;
            i--;
        }
        if (cnt) ans.push_back({i-1, cnt});
        r = d[r][i];
    }
    reverse(ans.begin(), ans.end());
    cout << ans.size(), el;
    for (auto p:ans) cout << p.fi << ' ' << p.se, el;
}

Compilation message (stderr)

jetpack.cpp:17:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   17 | main()
      | ^~~~

• Subtask 1: 80 / 80