Submission #1217955

#	Time	Username	Problem	Language	Result	Execution time	Memory
1217955		qwusha	Soccer Stadium (IOI23_soccer)	C++20	0 / 100	0 ms	320 KiB

soccer

#include <bits/stdc++.h>
#include "soccer.h"
using namespace std;
#define fi first
#define se second
typedef long long ll;
typedef long double ld;
mt19937 rnd(chrono::high_resolution_clock::now().time_since_epoch().count());
ll inf = 1e18;


int n;

bool all_good(vector<vector<int>> f, int chi, int chj) {
    bool ok = 1;
    for (int vi = chi; vi <= chi; vi++) {
        for (int vj = chj; vj <= chj; vj++) {
            for (int ui = 0; ui < n; ui++) {
                for (int uj = 0; uj < n; uj++) {
                    if (!(f[vi][vj] == 0 && f[ui][uj] == 0))
                        continue;
                    int mini = min(vi, ui);
                    int maxi = max(vi, ui);
                    int minj = min(vj, uj);
                    int maxj = max(vj, uj);
                    bool fii = 1, fij = 1;
                    for (int i = mini; i <= maxi; i++) {
                        if (f[i][vj] == 1)
                            fii = 0;
                        if (f[i][uj] == 1)
                            fij = 0;
                    }
                    for (int j = minj; j <= maxj; j++) {
                        if (f[ui][j] == 1)
                            fii = 0;
                        if (f[vi][j] == 1) {
                            fij = 0;
                        }
                    }
                    if (fii == 0 && fij == 0) {
                        ok = 0;
                    }
                }
            }
        }
    }
    return ok;
}



vector<vector<int>> constr(set<pair<int, int>> st) {
    vector<vector<int>> vec(n, vector<int>(n, 1));
    for (auto [i, j] : st) {
        vec[i][j] = 0;
    }
}


int biggest_stadium(int N, vector<vector<int>> f) {
    int res = 0;
    n = N;
    vector<set<pair<int, int>>> st, newst;
    set<set<pair<int, int>>> newSET;
    vector<pair<int, int>> emp;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            if (f[i][j] == 0) {
                set<pair<int,int>> setik = {{i, j}};
                emp.push_back({i,j});
                st.push_back(setik);
            }
        }
    }
    while (!st.empty()) {
        res++;
        newst.clear();
        newSET.clear();
        for (auto setik : st) {
            for (auto [ci, cj] : emp) {
                if (setik.find({ci, cj}) != setik.end()) {
                    continue;
                }
                setik.insert({ci, cj});
                auto vec = constr(setik);
                if (all_good(vec, ci, cj)) {
                    newst.push_back(setik);
                }
                setik.erase({ci, cj});
            }
        }
        for (auto el : newst) {
            newSET.insert(el);
        }
        st.clear();
        for (auto el : newSET) {
            st.push_back(el);
        }
    }
    return res;
}

Compilation message (stderr)

soccer.cpp: In function 'std::vector<std::vector<int> > constr(std::set<std::pair<int, int> >)':
soccer.cpp:57:1: warning: no return statement in function returning non-void [-Wreturn-type]
   57 | }
      | ^

• Subtask 0: 0 / 0
• Subtask 1: 0 / 6
• Subtask 2: 0 / 8
• Subtask 3: 0 / 22
• Subtask 4: 0 / 18
• Subtask 5: 0 / 16
• Subtask 6: 0 / 30