oj.uz

Submission #957889

# Submission time Handle Problem Language Result Execution time Memory
957889 2024-04-04T12:47:46 Z gaga999 Bomb (IZhO17_bomb) C++17
100 / 100
 228 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);
        }
        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 8 ms 54280 KB Output is correct
4 Correct 8 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 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2440 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 2496 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 4800 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 4 ms 10076 KB Output is correct
31 Correct 3 ms 7516 KB Output is correct
32 Correct 3 ms 10072 KB Output is correct
33 Correct 4 ms 10588 KB Output is correct
34 Correct 1 ms 4956 KB Output is correct
35 Correct 2 ms 6744 KB Output is correct
36 Correct 5 ms 14940 KB Output is correct
37 Correct 1 ms 2652 KB Output is correct
38 Correct 226 ms 55488 KB Output is correct
39 Correct 1 ms 2652 KB Output is correct
40 Correct 20 ms 23488 KB Output is correct
41 Correct 1 ms 2652 KB Output is correct
42 Correct 1 ms 3164 KB Output is correct
43 Correct 185 ms 53844 KB Output is correct
44 Correct 5 ms 13916 KB Output is correct
45 Correct 178 ms 55124 KB Output is correct
46 Correct 163 ms 55384 KB Output is correct
47 Correct 176 ms 55480 KB Output is correct
48 Correct 155 ms 55380 KB Output is correct
49 Correct 223 ms 55380 KB Output is correct
50 Correct 165 ms 55376 KB Output is correct
51 Correct 160 ms 55596 KB Output is correct
52 Correct 158 ms 55380 KB Output is correct
53 Correct 163 ms 55280 KB Output is correct
54 Correct 130 ms 47792 KB Output is correct
55 Correct 114 ms 44836 KB Output is correct
56 Correct 217 ms 55516 KB Output is correct
57 Correct 100 ms 42216 KB Output is correct
58 Correct 116 ms 45236 KB Output is correct
59 Correct 98 ms 44628 KB Output is correct
60 Correct 133 ms 54612 KB Output is correct
61 Correct 221 ms 55604 KB Output is correct
62 Correct 221 ms 55620 KB Output is correct
63 Correct 228 ms 55376 KB Output is correct
64 Correct 95 ms 54736 KB Output is correct
65 Correct 153 ms 55124 KB Output is correct
66 Correct 149 ms 55128 KB Output is correct
67 Correct 175 ms 55636 KB Output is correct
68 Correct 187 ms 55624 KB Output is correct
69 Correct 100 ms 42256 KB Output is correct
70 Correct 35 ms 21084 KB Output is correct
71 Correct 75 ms 41472 KB Output is correct
72 Correct 91 ms 42836 KB Output is correct
73 Correct 93 ms 43088 KB Output is correct
74 Correct 94 ms 47292 KB Output is correct
75 Correct 95 ms 50276 KB Output is correct
76 Correct 99 ms 51388 KB Output is correct
77 Correct 98 ms 51568 KB Output is correct
78 Correct 102 ms 51796 KB Output is correct
79 Correct 43 ms 17096 KB Output is correct
80 Correct 42 ms 21084 KB Output is correct
81 Correct 48 ms 20840 KB Output is correct
82 Correct 108 ms 52820 KB Output is correct
83 Correct 103 ms 52924 KB Output is correct
84 Correct 43 ms 11344 KB Output is correct
85 Correct 98 ms 52820 KB Output is correct
86 Correct 201 ms 54864 KB Output is correct
87 Correct 95 ms 52820 KB Output is correct
88 Correct 107 ms 51976 KB Output is correct
89 Correct 135 ms 53180 KB Output is correct
90 Correct 59 ms 44420 KB Output is correct
91 Correct 112 ms 53076 KB Output is correct
92 Correct 131 ms 51932 KB Output is correct
93 Correct 195 ms 54444 KB Output is correct
94 Correct 127 ms 52764 KB Output is correct
95 Correct 104 ms 53588 KB Output is correct
96 Correct 107 ms 52940 KB Output is correct
97 Correct 211 ms 54872 KB Output is correct
98 Correct 107 ms 53392 KB Output is correct
99 Correct 135 ms 53440 KB Output is correct
100 Correct 194 ms 54356 KB Output is correct