oj.uz

Submission #957887

# Submission time Handle Problem Language Result Execution time Memory
957887 2024-04-04T12:47:12 Z gaga999 Bomb (IZhO17_bomb) C++17
90 / 100
 207 ms 55868 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);
        }
        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);
        }
    }
    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
90.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 7 ms 54364 KB Output is correct
4 Correct 7 ms 54364 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Incorrect 1 ms 2396 KB Output isn't correct
8 Correct 1 ms 2392 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 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 2648 KB Output is correct
19 Correct 1 ms 4700 KB Output is correct
20 Correct 1 ms 4696 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 4728 KB Output is correct
25 Correct 1 ms 4956 KB Output is correct
26 Incorrect 1 ms 4956 KB Output isn't correct
27 Incorrect 2 ms 11100 KB Output isn't 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 7516 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 4956 KB Output is correct
35 Correct 2 ms 6748 KB Output is correct
36 Incorrect 4 ms 15032 KB Output isn't correct
37 Correct 1 ms 2652 KB Output is correct
38 Correct 189 ms 55508 KB Output is correct
39 Correct 1 ms 2648 KB Output is correct
40 Correct 15 ms 23388 KB Output is correct
41 Correct 1 ms 2652 KB Output is correct
42 Correct 1 ms 3164 KB Output is correct
43 Correct 162 ms 53600 KB Output is correct
44 Correct 4 ms 13912 KB Output is correct
45 Correct 159 ms 55264 KB Output is correct
46 Correct 148 ms 55520 KB Output is correct
47 Correct 160 ms 55120 KB Output is correct
48 Correct 128 ms 55388 KB Output is correct
49 Incorrect 198 ms 55636 KB Output isn't correct
50 Correct 142 ms 55500 KB Output is correct
51 Correct 148 ms 55380 KB Output is correct
52 Correct 139 ms 55608 KB Output is correct
53 Correct 149 ms 55124 KB Output is correct
54 Correct 112 ms 47440 KB Output is correct
55 Correct 105 ms 44848 KB Output is correct
56 Correct 197 ms 55608 KB Output is correct
57 Correct 89 ms 42324 KB Output is correct
58 Correct 107 ms 45160 KB Output is correct
59 Correct 95 ms 44668 KB Output is correct
60 Incorrect 121 ms 54612 KB Output isn't correct
61 Incorrect 204 ms 55868 KB Output isn't correct
62 Incorrect 199 ms 55616 KB Output isn't correct
63 Incorrect 207 ms 55376 KB Output isn't correct
64 Incorrect 81 ms 54864 KB Output isn't correct
65 Correct 140 ms 55060 KB Output is correct
66 Correct 141 ms 54996 KB Output is correct
67 Correct 159 ms 55508 KB Output is correct
68 Correct 182 ms 55636 KB Output is correct
69 Correct 91 ms 42168 KB Output is correct
70 Correct 45 ms 21036 KB Output is correct
71 Correct 70 ms 41300 KB Output is correct
72 Correct 82 ms 42928 KB Output is correct
73 Correct 85 ms 43180 KB Output is correct
74 Correct 83 ms 47152 KB Output is correct
75 Correct 94 ms 50256 KB Output is correct
76 Correct 92 ms 51480 KB Output is correct
77 Correct 93 ms 51564 KB Output is correct
78 Correct 90 ms 51792 KB Output is correct
79 Correct 40 ms 16988 KB Output is correct
80 Correct 43 ms 21084 KB Output is correct
81 Correct 46 ms 21092 KB Output is correct
82 Correct 102 ms 52816 KB Output is correct
83 Correct 100 ms 53020 KB Output is correct
84 Correct 35 ms 10800 KB Output is correct
85 Correct 93 ms 52928 KB Output is correct
86 Correct 184 ms 54872 KB Output is correct
87 Correct 88 ms 52732 KB Output is correct
88 Correct 104 ms 51796 KB Output is correct
89 Correct 130 ms 53332 KB Output is correct
90 Correct 48 ms 44380 KB Output is correct
91 Correct 103 ms 53172 KB Output is correct
92 Correct 122 ms 51860 KB Output is correct
93 Correct 179 ms 54264 KB Output is correct
94 Correct 120 ms 52596 KB Output is correct
95 Correct 97 ms 53588 KB Output is correct
96 Correct 102 ms 53072 KB Output is correct
97 Correct 186 ms 54688 KB Output is correct
98 Correct 105 ms 53184 KB Output is correct
99 Correct 124 ms 53328 KB Output is correct
100 Correct 180 ms 54096 KB Output is correct