Submission #763056

#TimeUsernameProblemLanguageResultExecution timeMemory
763056Charizard2021Furniture (JOI20_furniture)C++17
0 / 100
5 ms308 KiB
#include<bits/stdc++.h> using namespace std; #define IOS ios::sync_with_stdio(false);; cin.tie(NULL) void selfMax(long long& a, long long b){ a = max(a, b); } void selfMin(long long& a, long long b){ a = min(a, b); } template<typename T> istream& operator>>(istream& in, vector<T>& a) {for(auto &x : a) in >> x; return in;}; template<typename T1, typename T2> istream& operator>>(istream& in, pair<T1, T2>& x) {return in >> x.first >> x.second;} template<typename T1, typename T2> ostream& operator<<(ostream& out, const pair<T1, T2>& x) {return out << x.first << ' ' << x.second;} template<typename T> ostream& operator<<(ostream& out, vector<T>& a) {for(auto &x : a) out << x << ' '; return out;}; template<typename T> ostream& operator<<(ostream& out, vector<vector<T> >& a) {for(auto &x : a) out << x << '\n'; return out;}; template<typename T1, typename T2> ostream& operator<<(ostream& out, vector<pair<T1, T2> >& a) {for(auto &x : a) out << x << '\n'; return out;}; /* Use DSU dsu(N); */ struct DSU { vector<long long> e; DSU(long long N) { e = vector<long long>(N, -1); } // get representive component (uses path compression) long long get(long long x) { return e[x] < 0 ? x : e[x] = get(e[x]); } bool same_set(long long a, long long b) { return get(a) == get(b); } long long size(long long x) { return -e[get(x)]; } bool unite(long long x, long long y) { // union by size x = get(x), y = get(y); if (x == y) return false; if (e[x] > e[y]) swap(x, y); e[x] += e[y]; e[y] = x; return true; } }; /* Run with Bit<long long> BIT */ template <class T> class BIT { private: long long size; vector<T> bit; vector<T> arr; public: BIT(long long size) : size(size), bit(size + 1), arr(size) {} void set(long long ind, long long val) { add(ind, val - arr[ind]); } void add(long long ind, long long val) { arr[ind] += val; ind++; for (; ind <= size; ind += ind & -ind) { bit[ind] += val; } } T pref_sum(long long ind) { ind++; T total = 0; for (; ind > 0; ind -= ind & -ind) { total += bit[ind]; } return total; } }; /* Change Comb for specific Seg tree probs, but run with Seg<long long> Seg; */ template<class T> struct Seg { const T ID = 1e18; T comb(T a, T b) { return min(a,b); } long long n; vector<T> seg; void init(long long _n) { n = _n; seg.assign(2*n,ID); } void pull(long long p) { seg[p] = comb(seg[2*p],seg[2*p+1]); } void upd(long long p, T val) { seg[p += n] = val; for (p /= 2; p; p /= 2) pull(p); } T query(long long l, long long r) { T ra = ID, rb = ID; for (l += n, r += n+1; l < r; l /= 2, r /= 2) { if (l&1) ra = comb(ra,seg[l++]); if (r&1) rb = comb(seg[--r],rb); } return comb(ra,rb); } }; bool inside(int i, int j, int n, int m){ return (1 <= i && i <= n && 1 <= j && j <= m); } int main(){ int n, m; cin >> n >> m; int grid[2 + n][2 + m]; queue<pair<int, int> > q; int counter[1 + n + m]; memset(counter, 0, sizeof(counter)); for(int i = 0; i < m + 2; i++){ grid[0][i] = grid[n + 1][i] = 1; } for(int i = 0; i < n + 2; i++){ grid[i][0] = grid[i][m + 1] = 1; } for(int i = 1; i <= n; i++){ for(int j = 1; j <= m; j++){ cin >> grid[i][j]; if(grid[i][j]){ q.push(make_pair(i, j)); } else{ counter[i + j]++; } } } while(!q.empty()){ pair<int, int> u = q.front(); q.pop(); if(grid[u.first - 1][u.second + 1]){ if(inside(u.first - 1, u.second, n, m) && !grid[u.first - 1][u.second]){ grid[u.first - 1][u.second] = 1; counter[u.first + u.second - 1]--; q.push(make_pair(u.first - 1, u.second)); } if(inside(u.first, u.second + 1, n, m) && !grid[u.first][u.second + 1]){ grid[u.first][u.second + 1] = 1; counter[u.first + u.second + 1]--; q.push(make_pair(u.first, u.second + 1)); } } if(grid[u.first + 1][u.second - 1]){ if(inside(u.first + 1, u.second, n, m) && !grid[u.first + 1][u.second]){ grid[u.first + 1][u.second] = 1; counter[u.first + u.second + 1]--; } if(inside(u.first, u.second - 1, n, m) && !grid[u.first][u.second - 1]){ grid[u.first][u.second - 1] = 1; counter[u.first + u.second - 1]--; q.push(make_pair(u.first, u.second - 1)); } } } int queries; cin >> queries; while(queries--){ int a, b; cin >> a >> b; if(grid[a][b]){ cout << 1 << "\n"; } else if(counter[a + b] == 1){ cout << 0 << "\n"; } else{ cout << 1 << "\n"; grid[a][b] = 1; counter[a + b]--; q.push(make_pair(a, b)); while(!q.empty()){ pair<int, int> u = q.front(); q.pop(); if(grid[u.first - 1][u.second + 1]){ if(inside(u.first - 1, u.second, n, m) && !grid[u.first - 1][u.second]){ grid[u.first - 1][u.second] = 1; counter[u.first + u.second - 1]--; q.push(make_pair(u.first - 1, u.second)); } if(inside(u.first, u.second + 1, n, m) && !grid[u.first][u.second + 1]){ grid[u.first][u.second + 1] = 1; counter[u.first + u.second + 1]--; q.push(make_pair(u.first, u.second + 1)); } } if(grid[u.first + 1][u.second - 1]){ if(inside(u.first + 1, u.second, n, m) && !grid[u.first + 1][u.second]){ grid[u.first + 1][u.second] = 1; counter[u.first + u.second + 1]--; } if(inside(u.first, u.second - 1, n, m) && !grid[u.first][u.second - 1]){ grid[u.first][u.second - 1] = 1; counter[u.first + u.second - 1]--; q.push(make_pair(u.first, u.second - 1)); } } } } } }
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