Submission #696058

#	Time	Username	Problem	Language	Result	Execution time	Memory
696058		Vu_CG_Coder	Tram (CEOI13_tram)	C++14	0 / 100	1080 ms	2228 KiB

tram

/* [Author : Hoang Duy Vu] - THPT Chuyen Nguyen Du    */
//#pragma GCC optimize(" unroll-loops")
//#pragma gcc optimize("Ofast")
//#pragma GCC optimization("Ofast")
//#pragma optimize(Ofast)
#include <bits/stdc++.h>
#define All(x) (x).begin(),(x).end()
#define ll long long
#define C make_pair
#define fi first
#define se second
#define two second.first
#define thr second.second
#define TASK "txt"
using namespace std;
template<typename T> bool maximize(T &res, const T &val) {
    if (res < val) { res = val; return true; } return false; }
template<typename T> bool minimize(T &res, const T &val) {
    if (res > val) { res = val; return true; } return false; }

typedef pair<ll,ll> ii;
typedef pair<ll,ii> iii;
const int LOG = 20;
const int INF = 1e9 + 7;
const ll LNF = 1e18 + 7;
const int mod = 1e9 + 7;
const int N = 30300;

set <int> p;
set <iii> t;
int f[200100][2];
map <ii,ii> k;
int n , m;

iii find(int x , int y)
{
    if (x == 0 && y == n + 1) return C(n*n + 1,C(1,0));
    if (x == 0) 
    {
        if (!f[y][0]) return  C((y - 1)*(y - 1) + 1,C(1,0));
        if (!f[y][1]) return  C((y - 1)*(y - 1) + 1,C(1,1));

        if (!f[1][0])
        return  C((y - 1)*(y - 1),C(1,0));
        else return  C((y - 1)*(y - 1),C(1,1));
    }

    if (y == n + 1)
    {
        if (!f[x][0]) return  C((n - x)*(n - x) + 1,C(n,0));
        if (!f[x][1]) return  C((n - x)*(n - x) + 1,C(n,1));

        if (!f[n][0])
        return  C((n - x)*(n - x),C(n,0));
        else return  C((n - x)*(n - x),C(n,1));
    }

    ll k = (x + y);

    ll z = k/2;

    iii res = C(0,C(0,0));

    if (!f[z][0]) res = max(res,min(C(1ll*(z - x)*(z - x) + (f[x][0] == 0),C(z,0ll)),C(1ll*(y - z)*(y - z) + (f[y][0] == 0),C(z,0ll))));
    if (!f[z][1]) res = max(res,min(C(1ll*(z - x)*(z - x) + (f[x][1] == 0),C(z,1ll)),C(1ll*(y - z)*(y - z) + (f[y][1] == 0),C(z,1ll))));

    if (k&1) z = k/2 + 1;

    if (!f[z][0]) res = max(res,min(C(1ll*(z - x)*(z - x) + (f[x][0] == 0),C(z,0ll)),C(1ll*(y - z)*(y - z) + (f[y][0] == 0),C(z,0ll))));
    if (!f[z][1]) res = max(res,min(C(1ll*(z - x)*(z - x) + (f[x][1] == 0),C(z,1ll)),C(1ll*(y - z)*(y - z) + (f[y][1] == 0),C(z,1ll))));

    return res;
}

set <ii> a;
ii T[N];

void input()
{
    cin >> n >> m;
}

void solve()
{
    a.insert(C(0,0));
    a.insert(C(n + 1,0));
    int cnt = 0;
    while (m--)
    {
        cnt++;
        char v;
        cin >> v;

        if (v == 'E')
        {
            iii res = C(0,C(0,0));

            for (auto d = a.begin() ; d != a.end() ; d++)
            {
                auto k = ++d;
                d--;
                if (k == a.end()) break;
               // cout << (*d).fi << " " << (*k).fi << "\n";
                res = max(res,find((*d).fi,(*k).fi));
            }

            f[res.two][res.thr] = 1;
            cout << res.two << " " << res.thr + 1 << "\n";

            T[cnt] = C(res.two,res.thr);
            a.insert(C(res.two,res.thr));
        }
        else 
        {
            int x;
            cin >> x;

            int X = T[x].fi;
            int Y = T[x].se;

            a.erase(C(X,Y));
            f[X][Y] = 0;
        }
    }
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(NULL); cout.tie(NULL);
    if(fopen(TASK".inp", "r")){
    freopen(TASK".inp","r",stdin);
    freopen(TASK".out","w",stdout);
    }

    int tk;
    tk = 1;
   //cin >> tk;
    while (tk--)
    {
        input();
        solve();
    }
    return 0;
}

Compilation message (stderr)

tram.cpp: In function 'int main()':
tram.cpp:132:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  132 |     freopen(TASK".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
tram.cpp:133:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  133 |     freopen(TASK".out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 15
• Subtask 8: 0 / 20