Submission #1215926

#TimeUsernameProblemLanguageResultExecution timeMemory
1215926M_SH_OBomb (IZhO17_bomb)C++20
12 / 100
206 ms59208 KiB
#include <bits/stdc++.h> //#include "grader.h" /*#include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp>*/ #define ll long long #define ll1 long long #define ull unsigned long long #define dou long double #define str string #define vll vector<ll> #define vi vector<int> #define pll pair<ll, ll> #define vpll vector<pll> #define vbool vector<bool> #define vstr vector<str> #define vvll vector<vll> #define pb push_back #define pf push_front #define endl "\n" #define fr first #define se second // #define sortcmp(a) sort(a.begin(), a.end(), cmp) #define sort(a) sort(a.begin(), a.end()) #define all(a) a.begin(), a.end() #define reverse(a) reverse(a.begin(), a.end()) #define speed ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0) #define INF 1000000000000000000 #define ordered_set tree<pll, null_type, less<pll>, rb_tree_tag, tree_order_statistics_node_update> using namespace std; //using namespace __gnu_pbds; mt19937 rng(1488); ll randll(ll l, ll r){ return uniform_int_distribution<ll>(l, r)(rng); } /*vector<map<ll, vll>> s; vll p; ll find(ll v) { if (p[v] == v) return v; return p[v] = find(p[v]); } void unite(ll a, ll b) { a = find(a); b = find(b); if (a == b) return; if (s[a].size() < s[b].size()) { p[a] = b; for (auto i : s[a]) { for (int j : i.se) { s[b][i.fr].pb(j); } } s[a].clear(); } else { p[b] = a; for (auto i : s[b]) { for (int j : i.se) { s[a][i.fr].pb(j); } } s[b].clear(); } } vll tree1, d; void push(ll v, ll tl, ll tr) { if (tl == tr) return; tree1[v*2] += d[v]; tree1[v*2+1] += d[v]; d[v*2] += d[v]; d[v*2+1] += d[v]; d[v] = 0; tree1[v] = tree1[v*2]+tree1[v*2+1]; } void bt(ll v, ll tl, ll tr, vll& a) { if (tl == tr) { tree1[v] = a[tl]; return; } ll tm = (tl+tr)/2; bt(v*2, tl, tm, a); bt(v*2, tm+1, tr, a); tree1[v] = tree1[v*2]+tree1[v*2+1]; } ll get(ll l, ll r, ll v, ll tl, ll tr) { if (l <= tl && tr <= r) return tree1[v]; if (tl > r || tr < l) return 0; ll tm = (tl+tr)/2; push(v, tl, tr); return get(l, r, v*2, tl, tm)+get(l, r, v*2+1, tm+1, tr); } void update(ll l, ll r, ll val, ll v, ll tl, ll tr) { if (l <= tl && tr <= r) { tree1[v] += val; d[v] += val; push(v, tl, tr); return; } if (tl > r || tr < l) return; ll tm = (tl+tr)/2; push(v, tl, tr); update(l, r, val, v*2, tl, tm); update(l, r, val, v*2+1, tm+1, tr); tree1[v] = tree1[v*2]+tree1[v*2+1]; }*/ ll sum(ll x, ll y, ll x1, ll y1, vvll& p) { x ++, y ++, x1 ++, y1 ++; return p[x1][y1]-p[x1][y-1]-p[x-1][y1]+p[x-1][y-1]; } int main() { ll n, m; cin >> n >> m; vstr s(n); vvll p(n+7, vll(m+7, 0)); for (int i = 0; i < n; i ++) { cin >> s[i]; } for (int i = 1; i <= n; i ++) { for (int j = 1; j <= m; j ++) { p[i][j] = p[i-1][j]+p[i][j-1]-p[i-1][j-1]; if (s[i-1][j-1] == '1') p[i][j] ++; } } ll minly = INF, minlx = INF; for (int i = 0; i < n; i ++) { ll k = 0; for (int j = 0; j < m; j ++) { if (s[i][j] == '1') k ++; else if (k > 0) { /*ll l = i, r = n; while (r-l > 1) { ll x = (l+r)/2; if (sum(i, j-k, x, j-1, p) == (x-i+1)*(j-1-(j-k)+1)) l = x; else r = x; }*/ if (k < minly) { minly = k; //minlx = l-i+1; } /*if (k == minly) { minlx = min(minlx, l-i+1); }*/ k = 0; } } } //cout << minlx << ' ' << minly << endl; ll minly1 = INF, minlx1 = INF; for (int j = 0; j < m; j ++) { ll k = 0; for (int i = 0; i < n; i ++) { if (s[i][j] == '1') k ++; else if (k > 0) { /*ll l = j, r = m; while (r-l > 1) { ll x = (l+r)/2; if (sum(i-k, j, i-1, x, p) == (x-j+1)*(i-(i-k))) l = x; else r = x; }*/ if (k < minlx1) { minlx1 = k; //minly1 = l-j+1; } /*if (k == minlx1) { minly1 = min(minly1, l-j+1); }*/ k = 0; } } } /*minly = min(minly, minly1); minlx = min(minlx, minlx1);*/ cout << minly*minlx1 << endl; }
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