oj.uz

Submission #957877

# Submission time Handle Problem Language Result Execution time Memory
957877 2024-04-04T12:43:39 Z gaga999 Bomb (IZhO17_bomb) C++17
100 / 100
 230 ms 55844 KB 
// #pragma GCC optimize("Ofast,no-stack-protector")
// #pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx,avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
#define lowbit(x) ((x) & -(x))
#define ml(a, b) ((1ll * (a) * (b)) % M)
#define tml(a, b) (a) = ((1ll * (a) * (b)) % M)
#define ad(a, b) ((0ll + (a) + (b)) % M)
#define tad(a, b) (a) = ((0ll + (a) + (b)) % M)
#define mi(a, b) ((0ll + M + (a) - (b)) % M)
#define tmi(a, b) (a) = ((0ll + M + (a) - (b)) % M)
#define tmin(a, b) (a) = min((a), (b))
#define tmax(a, b) (a) = max((a), (b))
#define iter(a) (a).begin(), (a).end()
#define riter(a) (a).rbegin(), (a).rend()
#define init(a, b) memset((a), (b), sizeof(a))
#define cpy(a, b) memcpy((a), (b), sizeof(a))
#define uni(a) a.resize(unique(iter(a)) - a.begin())
#define size(x) (int)x.size()
#define pb emplace_back
#define mpr make_pair
#define ls(i) ((i) << 1)
#define rs(i) ((i) << 1 | 1)
#define INF 0x3f3f3f3f
#define NIF 0xc0c0c0c0
#define eps 1e-9
#define F first
#define S second
#define AC cin.tie(0)->sync_with_stdio(0)
using namespace std;
typedef long long llt;
typedef __int128_t lll;
typedef pair<int, int> pii;
typedef pair<double, double> pdd;
typedef pair<llt, llt> pll;
typedef complex<double> cd;
// const int M = 998244353;

// random_device rm;
// mt19937 rg(rm());
// default_random_engine rg(rm());
// uniform_int_distribution<int> rd(INT_MIN, INT_MAX);
// uniform_real_distribution<double> rd(0, M_PI);

void db() { cerr << "\n"; }
template <class T, class... U>
void db(T a, U... b) { cerr << a << " ", db(b...); }

inline char gc()
{
    const static int SZ = 1 << 16;
    static char buf[SZ], *p1, *p2;
    if (p1 == p2 && (p2 = buf + fread(p1 = buf, 1, SZ, stdin), p1 == p2))
        return -1;
    return *p1++;
}
void rd() {}
template <typename T, typename... U>
void rd(T &x, U &...y)
{
    x = 0;
    bool f = 0;
    char c = gc();
    while (!isdigit(c))
        f ^= !(c ^ 45), c = gc();
    while (isdigit(c))
        x = (x << 1) + (x << 3) + (c ^ 48), c = gc();
    f && (x = -x), rd(y...);
}

template <typename T>
void prt(T x)
{
    if (x < 0)
        putchar('-'), x = -x;
    if (x > 9)
        prt(x / 10);
    putchar((x % 10) ^ 48);
}

const int N = 2505;
char gd[N][N];
int up[N][N], dn[N][N], an[N];

signed main()
{
    int n, m;
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= n; i++)
        scanf("%s", gd[i] + 1);
    for (int j = 1; j <= m; j++)
    {
        for (int i = 1; i <= n; i++)
            if (gd[i][j] == '1')
                up[i][j] = up[i - 1][j] + 1;
        for (int i = n; i > 0; i--)
            if (gd[i][j] == '1')
                dn[i][j] = dn[i + 1][j] + 1;
    }
    init(an, INF);
    int mx = m;
    for (int i = 1; i <= n; i++)
    {
        int m1 = INF, m2 = INF, cr = 0;
        for (int j = 1; j <= m; j++)
        {
            if (gd[i][j] == '0')
            {
                m1 = m2 = INF;
                if (cr)
                    tmin(mx, cr), cr = 0;
                continue;
            }
            cr++, tmin(m1, up[i][j]), tmin(m2, dn[i][j]);
            tmin(an[cr], m1 + m2 - 1);
            tmin(an[1], up[i][j] + dn[i][j] - 1);
        }
        m1 = INF, m2 = INF, cr = 0;
        for (int j = m; j > 0; j--)
        {
            if (gd[i][j] == '0')
            {
                m1 = m2 = INF;
                if (cr)
                    tmin(mx, cr), cr = 0;
                continue;
            }
            cr++, tmin(m1, up[i][j]), tmin(m2, dn[i][j]);
            tmin(an[cr], m1 + m2 - 1);
            tmin(an[1], up[i][j] + dn[i][j] - 1);
        }
    }
    int ans = 0;
    for (int i = 1; i <= mx; i++)
        tmax(ans, an[i] * i), tmin(an[i + 1], an[i]);
    prt(ans), putchar('\n');
}

Compilation message

bomb.cpp: In function 'int main()':
bomb.cpp:88:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   88 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
bomb.cpp:90:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   90 |         scanf("%s", gd[i] + 1);
      |         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 21 ms 54256 KB Output is correct
4 Correct 8 ms 54276 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 1 ms 4700 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 1 ms 4700 KB Output is correct
20 Correct 1 ms 4700 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2652 KB Output is correct
23 Correct 1 ms 4700 KB Output is correct
24 Correct 1 ms 4700 KB Output is correct
25 Correct 1 ms 4956 KB Output is correct
26 Correct 1 ms 4956 KB Output is correct
27 Correct 3 ms 11100 KB Output is correct
28 Correct 2 ms 4956 KB Output is correct
29 Correct 4 ms 10588 KB Output is correct
30 Correct 3 ms 10072 KB Output is correct
31 Correct 3 ms 7512 KB Output is correct
32 Correct 3 ms 10076 KB Output is correct
33 Correct 4 ms 10588 KB Output is correct
34 Correct 2 ms 5212 KB Output is correct
35 Correct 2 ms 6748 KB Output is correct
36 Correct 5 ms 14940 KB Output is correct
37 Correct 1 ms 2648 KB Output is correct
38 Correct 230 ms 55484 KB Output is correct
39 Correct 1 ms 2652 KB Output is correct
40 Correct 18 ms 23280 KB Output is correct
41 Correct 1 ms 2652 KB Output is correct
42 Correct 1 ms 3164 KB Output is correct
43 Correct 194 ms 53588 KB Output is correct
44 Correct 6 ms 13916 KB Output is correct
45 Correct 181 ms 55124 KB Output is correct
46 Correct 171 ms 55508 KB Output is correct
47 Correct 183 ms 55252 KB Output is correct
48 Correct 153 ms 55416 KB Output is correct
49 Correct 220 ms 55376 KB Output is correct
50 Correct 165 ms 55620 KB Output is correct
51 Correct 167 ms 55576 KB Output is correct
52 Correct 158 ms 55376 KB Output is correct
53 Correct 163 ms 55124 KB Output is correct
54 Correct 124 ms 47548 KB Output is correct
55 Correct 119 ms 44868 KB Output is correct
56 Correct 225 ms 55380 KB Output is correct
57 Correct 98 ms 42324 KB Output is correct
58 Correct 115 ms 45264 KB Output is correct
59 Correct 96 ms 44624 KB Output is correct
60 Correct 129 ms 54608 KB Output is correct
61 Correct 218 ms 55472 KB Output is correct
62 Correct 229 ms 55764 KB Output is correct
63 Correct 222 ms 55620 KB Output is correct
64 Correct 93 ms 54920 KB Output is correct
65 Correct 157 ms 55060 KB Output is correct
66 Correct 150 ms 55120 KB Output is correct
67 Correct 183 ms 55612 KB Output is correct
68 Correct 200 ms 55844 KB Output is correct
69 Correct 99 ms 42240 KB Output is correct
70 Correct 35 ms 20824 KB Output is correct
71 Correct 73 ms 41480 KB Output is correct
72 Correct 86 ms 43012 KB Output is correct
73 Correct 101 ms 43448 KB Output is correct
74 Correct 102 ms 47192 KB Output is correct
75 Correct 102 ms 50240 KB Output is correct
76 Correct 100 ms 51476 KB Output is correct
77 Correct 102 ms 51368 KB Output is correct
78 Correct 109 ms 52264 KB Output is correct
79 Correct 53 ms 17196 KB Output is correct
80 Correct 43 ms 21080 KB Output is correct
81 Correct 46 ms 21076 KB Output is correct
82 Correct 110 ms 52968 KB Output is correct
83 Correct 119 ms 52916 KB Output is correct
84 Correct 36 ms 10792 KB Output is correct
85 Correct 106 ms 53136 KB Output is correct
86 Correct 206 ms 54868 KB Output is correct
87 Correct 93 ms 52812 KB Output is correct
88 Correct 114 ms 51904 KB Output is correct
89 Correct 134 ms 53308 KB Output is correct
90 Correct 56 ms 44372 KB Output is correct
91 Correct 121 ms 53128 KB Output is correct
92 Correct 141 ms 51796 KB Output is correct
93 Correct 201 ms 54480 KB Output is correct
94 Correct 137 ms 52656 KB Output is correct
95 Correct 107 ms 53592 KB Output is correct
96 Correct 106 ms 52872 KB Output is correct
97 Correct 209 ms 54684 KB Output is correct
98 Correct 122 ms 53268 KB Output is correct
99 Correct 133 ms 53428 KB Output is correct
100 Correct 197 ms 54256 KB Output is correct