Submission #995397

#	Time	Username	Problem	Language	Result	Execution time	Memory
995397		cpptowin	Collecting Mushrooms (NOI18_collectmushrooms)	C++17	19 / 100	19 ms	24412 KiB

mushrooms

#include <bits/stdc++.h>
#define fo(i, d, c) for (int i = d; i <= c; i++)
#define fod(i, c, d) for (int i = c; i >= d; i--)
#define maxn 1000010
#define N 1010
#define fi first
#define se second
#define pb emplace_back
#define en cout << "\n";
#define inf (int)1e18
#define pii pair<int, int>
#define vii vector<pii>
#define lb(x) x & -x
#define bit(i, j) ((i >> j) & 1)
#define offbit(i, j) (i ^ (1LL << j))
#define onbit(i, j) (i | (1LL << j))
#define vi vector<int>
template <typename T1, typename T2>
bool minimize(T1 &a, T2 b)
{
    if (a > b)
    {
        a = b;
        return true;
    }
    return false;
}
template <typename T1, typename T2>
bool maximize(T1 &a, T2 b)
{
    if (a < b)
    {
        a = b;
        return true;
    }
    return false;
}
using namespace std;
const int nsqrt = 450;
const int mod = 1e9 + 7;
int n,m,d,k;
vector<vi> a,b;
main()
{
#define name "TASK"
    if (fopen(name ".inp", "r"))
    {
        freopen(name ".inp", "r", stdin);
        freopen(name ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> m >> d >> k;
    a.resize(n + 5);
    b.resize(n + 5);
    fo(i,0,n + 4) a[i].resize(m + 5,0),b[i].resize(m + 5,0);
    fo(i,1,n) fo(j,1,m)
    {
        char t;
        cin >> t;
        if(t == 'M') a[i][j] = 1;
        if(t == 'S')
        {
            b[max(i - d,1)][max(j - d,1)]++;
            b[min(i + d,n + 1)][min(j + d,m + 1)]--;
        }
    }
    fo(i,1,n) fo(j,1,m) b[i][j] += b[i][j - 1] + b[i - 1][j] - b[i - 1][j - 1];
    int ans = 0;
    fo(i,1,n) fo(j,1,m) if(a[i][j] == 1 and b[i][j] >= k) ans++;
    cout << ans;
}

Compilation message (stderr)

mushrooms.cpp:43:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   43 | main()
      | ^~~~
mushrooms.cpp: In function 'int main()':
mushrooms.cpp:48:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |         freopen(name ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
mushrooms.cpp:49:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |         freopen(name ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 0 / 18
• Subtask 4: 0 / 23
• Subtask 5: 0 / 19
• Subtask 6: 0 / 21