Submission #1126374

#	Time	Username	Problem	Language	Result	Execution time	Memory
1126374		hqminhuwu	Bomb (IZhO17_bomb)	C++17	0 / 100	4 ms	656 KiB

bomb

#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector <int> vi;
typedef pair <ll,ll> pll;
typedef pair <int,int> pii;
typedef pair <int,pii> piii;

#define forr(_a,_b,_c) for(int _a = (_b); _a <= int (_c); ++_a)
#define ford(_a,_b,_c) for(int _a = (_b) + 1; _a --> int (_c);)
#define forf(_a,_b,_c) for(int _a = (_b); _a < int (_c); ++_a)
#define st first
#define nd second
#define pb push_back
#define mp make_pair
#define all(x) begin(x),end(x)
#define mask(i) (1LL << (i))
#define bit(x, i) (((x) >> (i)) & 1)
#define bp __builtin_popcountll
#define file "test"

template<class X, class Y>
    bool minz(X &x, const Y &y) {
        if (x > y) {
            x = y;
            return true;
        } return false;
    }
template<class X, class Y>
    bool maxz(X &x, const Y &y) {
        if (x < y) {
            x = y;
            return true;
        } return false;
    }

const int N = 25e2 + 5;
const ll oo = (ll) 1e16;
const ll mod = 1e9 + 7; // 998244353;

int n, m, l[N][N], r[N][N], u[N][N], d[N][N];
string s[N];

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    #ifndef ONLINE_JUDGE
        freopen(file".inp", "r", stdin); freopen(file".out", "w", stdout);
    #endif

    cin >> n >> m;

    forr (i, 1, n){
        cin >> s[i];
        s[i] = '#' + s[i];
    }


    forr (i, 1, n){
        int lst = 0;
        forr (j, 1, m){
            if (s[i][j] == '0')
                lst = j;
            else l[i][j] = lst;
        }

        lst = m + 1;
        ford (j, m, 1){
            if (s[i][j] == '0')
                lst = j;
            else r[i][j] = lst;
        }
    }

    forr (j, 1, m){
        int lst = 0;
        forr (i, 1, n){
            if (s[i][j] == '0')
                lst = i;
            else u[i][j] = lst;
        }

        lst = n + 1;
        ford (i, n, 1){
            if (s[i][j] == '0')
                lst = i;
            else d[i][j] = lst;
        }
    }

    int h = n, w = m;

    forr (i, 1, n){
        forr (j, 1, m){
            if (s[i][j] == '1'){
                minz(h, d[i][j] - u[i][j] - 1);
                minz(w, r[i][j] - l[i][j] - 1);
            }
        }
    }

    cout << w * h << "\n";


    return 0;
}
/*



*/

Compilation message (stderr)

bomb.cpp: In function 'int main()':
bomb.cpp:48:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |         freopen(file".inp", "r", stdin); freopen(file".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bomb.cpp:48:49: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |         freopen(file".inp", "r", stdin); freopen(file".out", "w", stdout);
      |                                          ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 100