oj.uz

Submission #957866

# Submission time Handle Problem Language Result Execution time Memory
957866 2024-04-04T12:29:58 Z gaga999 Bomb (IZhO17_bomb) C++17
96 / 100
 228 ms 55768 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);
        }
        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);
        }
    }
    if (an[1] == INF)
        prt(n * m), putchar('\n'), exit(0);
    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
96.0 / 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 9 ms 54264 KB Output is correct
4 Correct 7 ms 54364 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Incorrect 1 ms 2396 KB Output isn't 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 1 ms 2396 KB Output is correct
11 Correct 1 ms 2648 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2484 KB Output is correct
14 Correct 1 ms 2392 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Incorrect 1 ms 2652 KB Output isn't 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 2 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 5 ms 10588 KB Output is correct
30 Correct 4 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 5 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 5 ms 14940 KB Output isn't correct
37 Correct 0 ms 2652 KB Output is correct
38 Correct 219 ms 55768 KB Output is correct
39 Correct 1 ms 2648 KB Output is correct
40 Incorrect 18 ms 23388 KB Output isn't correct
41 Correct 1 ms 2652 KB Output is correct
42 Correct 1 ms 3164 KB Output is correct
43 Correct 204 ms 53612 KB Output is correct
44 Correct 6 ms 13912 KB Output is correct
45 Correct 184 ms 55172 KB Output is correct
46 Correct 171 ms 55588 KB Output is correct
47 Correct 183 ms 55112 KB Output is correct
48 Correct 153 ms 55636 KB Output is correct
49 Correct 217 ms 55636 KB Output is correct
50 Correct 168 ms 55412 KB Output is correct
51 Correct 162 ms 55604 KB Output is correct
52 Correct 167 ms 55612 KB Output is correct
53 Correct 167 ms 55120 KB Output is correct
54 Correct 126 ms 47632 KB Output is correct
55 Correct 122 ms 44880 KB Output is correct
56 Correct 224 ms 55432 KB Output is correct
57 Correct 104 ms 42364 KB Output is correct
58 Correct 121 ms 45020 KB Output is correct
59 Correct 100 ms 44720 KB Output is correct
60 Correct 137 ms 54616 KB Output is correct
61 Correct 228 ms 55612 KB Output is correct
62 Correct 220 ms 55684 KB Output is correct
63 Correct 214 ms 55536 KB Output is correct
64 Correct 99 ms 54868 KB Output is correct
65 Correct 157 ms 55100 KB Output is correct
66 Correct 155 ms 55116 KB Output is correct
67 Correct 186 ms 55620 KB Output is correct
68 Correct 190 ms 55636 KB Output is correct
69 Correct 106 ms 42356 KB Output is correct
70 Correct 37 ms 20828 KB Output is correct
71 Correct 72 ms 41280 KB Output is correct
72 Correct 96 ms 42836 KB Output is correct
73 Correct 92 ms 43088 KB Output is correct
74 Correct 98 ms 47572 KB Output is correct
75 Correct 100 ms 50260 KB Output is correct
76 Correct 100 ms 51252 KB Output is correct
77 Correct 115 ms 51436 KB Output is correct
78 Correct 107 ms 51984 KB Output is correct
79 Correct 44 ms 17204 KB Output is correct
80 Correct 44 ms 20960 KB Output is correct
81 Correct 45 ms 21008 KB Output is correct
82 Correct 102 ms 52800 KB Output is correct
83 Correct 105 ms 53116 KB Output is correct
84 Correct 47 ms 10700 KB Output is correct
85 Correct 101 ms 52820 KB Output is correct
86 Correct 205 ms 54952 KB Output is correct
87 Correct 98 ms 52820 KB Output is correct
88 Correct 118 ms 52308 KB Output is correct
89 Correct 135 ms 53328 KB Output is correct
90 Correct 53 ms 44588 KB Output is correct
91 Correct 108 ms 53072 KB Output is correct
92 Correct 135 ms 51796 KB Output is correct
93 Correct 197 ms 54356 KB Output is correct
94 Correct 135 ms 52764 KB Output is correct
95 Correct 104 ms 53584 KB Output is correct
96 Correct 111 ms 52852 KB Output is correct
97 Correct 202 ms 54864 KB Output is correct
98 Correct 108 ms 53332 KB Output is correct
99 Correct 137 ms 53328 KB Output is correct
100 Correct 201 ms 54116 KB Output is correct