oj.uz

Submission #957852

# Submission time Handle Problem Language Result Execution time Memory
957852 2024-04-04T12:13:21 Z gaga999 Bomb (IZhO17_bomb) C++17
96 / 100
 213 ms 55636 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);
        }
    }
    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 2392 KB Output is correct
3 Correct 7 ms 54252 KB Output is correct
4 Correct 10 ms 54364 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Incorrect 0 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 2396 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 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 1 ms 4956 KB Output is correct
27 Correct 3 ms 11100 KB Output is correct
28 Correct 1 ms 4952 KB Output is correct
29 Correct 4 ms 10588 KB Output is correct
30 Correct 4 ms 9920 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 10416 KB Output is correct
34 Correct 1 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 1 ms 2652 KB Output is correct
38 Correct 211 ms 55520 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 156 ms 53588 KB Output is correct
44 Correct 5 ms 13916 KB Output is correct
45 Correct 130 ms 55272 KB Output is correct
46 Correct 131 ms 55452 KB Output is correct
47 Correct 149 ms 55124 KB Output is correct
48 Correct 125 ms 55380 KB Output is correct
49 Correct 189 ms 55624 KB Output is correct
50 Correct 148 ms 55636 KB Output is correct
51 Correct 148 ms 55392 KB Output is correct
52 Correct 143 ms 55376 KB Output is correct
53 Correct 149 ms 55376 KB Output is correct
54 Correct 109 ms 47604 KB Output is correct
55 Correct 101 ms 44880 KB Output is correct
56 Correct 208 ms 55628 KB Output is correct
57 Correct 88 ms 42184 KB Output is correct
58 Correct 99 ms 45116 KB Output is correct
59 Correct 96 ms 44624 KB Output is correct
60 Correct 128 ms 54584 KB Output is correct
61 Correct 209 ms 55612 KB Output is correct
62 Correct 210 ms 55632 KB Output is correct
63 Correct 213 ms 55632 KB Output is correct
64 Correct 86 ms 54888 KB Output is correct
65 Correct 138 ms 55384 KB Output is correct
66 Correct 142 ms 55188 KB Output is correct
67 Correct 157 ms 55632 KB Output is correct
68 Correct 152 ms 55464 KB Output is correct
69 Correct 80 ms 42136 KB Output is correct
70 Correct 32 ms 21000 KB Output is correct
71 Correct 71 ms 41468 KB Output is correct
72 Correct 86 ms 42840 KB Output is correct
73 Correct 89 ms 43092 KB Output is correct
74 Correct 85 ms 47256 KB Output is correct
75 Correct 84 ms 50260 KB Output is correct
76 Correct 97 ms 51284 KB Output is correct
77 Correct 81 ms 51540 KB Output is correct
78 Correct 95 ms 51808 KB Output is correct
79 Correct 39 ms 17216 KB Output is correct
80 Correct 35 ms 21084 KB Output is correct
81 Correct 44 ms 20932 KB Output is correct
82 Correct 86 ms 52920 KB Output is correct
83 Correct 96 ms 53060 KB Output is correct
84 Correct 35 ms 10588 KB Output is correct
85 Correct 82 ms 52816 KB Output is correct
86 Correct 176 ms 54864 KB Output is correct
87 Correct 74 ms 52988 KB Output is correct
88 Correct 101 ms 51796 KB Output is correct
89 Correct 124 ms 53280 KB Output is correct
90 Correct 42 ms 44376 KB Output is correct
91 Correct 113 ms 53120 KB Output is correct
92 Correct 114 ms 51792 KB Output is correct
93 Correct 191 ms 54356 KB Output is correct
94 Correct 130 ms 52768 KB Output is correct
95 Correct 85 ms 53584 KB Output is correct
96 Correct 85 ms 52820 KB Output is correct
97 Correct 191 ms 54728 KB Output is correct
98 Correct 87 ms 53332 KB Output is correct
99 Correct 108 ms 53332 KB Output is correct
100 Correct 172 ms 54552 KB Output is correct