oj.uz

Submission #957862

# Submission time Handle Problem Language Result Execution time Memory
957862 2024-04-04T12:28:15 Z gaga999 Bomb (IZhO17_bomb) C++17
87 / 100
 204 ms 55780 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);
        }
        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);
        }
    }
    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
87.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 22 ms 54108 KB Output is correct
4 Correct 8 ms 54616 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Incorrect 1 ms 2396 KB Output isn't correct
7 Incorrect 0 ms 2396 KB Output isn't 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 2 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 Incorrect 1 ms 4956 KB Output isn't correct
27 Incorrect 3 ms 11100 KB Output isn't correct
28 Correct 2 ms 4956 KB Output is correct
29 Correct 5 ms 10588 KB Output is correct
30 Correct 3 ms 10076 KB Output is correct
31 Correct 3 ms 7516 KB Output is correct
32 Correct 3 ms 9924 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 14940 KB Output isn't correct
37 Correct 1 ms 2652 KB Output is correct
38 Correct 198 ms 55436 KB Output is correct
39 Correct 1 ms 2648 KB Output is correct
40 Incorrect 13 ms 23384 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 173 ms 53436 KB Output is correct
44 Correct 8 ms 13916 KB Output is correct
45 Correct 163 ms 55232 KB Output is correct
46 Correct 159 ms 55780 KB Output is correct
47 Correct 168 ms 55104 KB Output is correct
48 Correct 142 ms 55632 KB Output is correct
49 Incorrect 204 ms 55632 KB Output isn't correct
50 Correct 155 ms 55624 KB Output is correct
51 Correct 159 ms 55604 KB Output is correct
52 Correct 141 ms 55376 KB Output is correct
53 Correct 147 ms 55124 KB Output is correct
54 Correct 115 ms 47440 KB Output is correct
55 Correct 109 ms 44884 KB Output is correct
56 Correct 182 ms 55612 KB Output is correct
57 Correct 91 ms 42320 KB Output is correct
58 Correct 108 ms 45136 KB Output is correct
59 Correct 91 ms 44628 KB Output is correct
60 Incorrect 112 ms 54604 KB Output isn't correct
61 Incorrect 194 ms 55636 KB Output isn't correct
62 Incorrect 192 ms 55612 KB Output isn't correct
63 Incorrect 196 ms 55632 KB Output isn't correct
64 Incorrect 85 ms 54736 KB Output isn't correct
65 Correct 142 ms 55136 KB Output is correct
66 Correct 144 ms 55120 KB Output is correct
67 Correct 172 ms 55416 KB Output is correct
68 Correct 175 ms 55600 KB Output is correct
69 Correct 93 ms 42068 KB Output is correct
70 Correct 34 ms 21072 KB Output is correct
71 Correct 70 ms 41432 KB Output is correct
72 Correct 98 ms 42860 KB Output is correct
73 Correct 86 ms 43088 KB Output is correct
74 Correct 83 ms 47192 KB Output is correct
75 Correct 84 ms 50260 KB Output is correct
76 Correct 88 ms 51412 KB Output is correct
77 Correct 96 ms 51536 KB Output is correct
78 Correct 89 ms 51792 KB Output is correct
79 Correct 40 ms 17208 KB Output is correct
80 Correct 44 ms 21084 KB Output is correct
81 Correct 46 ms 21072 KB Output is correct
82 Correct 98 ms 52820 KB Output is correct
83 Correct 98 ms 52924 KB Output is correct
84 Correct 55 ms 10584 KB Output is correct
85 Correct 91 ms 53148 KB Output is correct
86 Correct 182 ms 54704 KB Output is correct
87 Correct 84 ms 52816 KB Output is correct
88 Correct 95 ms 51796 KB Output is correct
89 Correct 125 ms 53584 KB Output is correct
90 Correct 48 ms 44532 KB Output is correct
91 Correct 122 ms 53048 KB Output is correct
92 Correct 124 ms 51792 KB Output is correct
93 Correct 176 ms 54384 KB Output is correct
94 Correct 117 ms 52784 KB Output is correct
95 Correct 89 ms 53500 KB Output is correct
96 Correct 94 ms 53140 KB Output is correct
97 Correct 175 ms 54868 KB Output is correct
98 Correct 98 ms 53172 KB Output is correct
99 Correct 114 ms 53336 KB Output is correct
100 Correct 153 ms 54092 KB Output is correct