Submission #876746

#	Time	Username	Problem	Language	Result	Execution time	Memory
876746		cpptowin	Bitaro the Brave (JOI19_ho_t1)	C++17	50 / 100	210 ms	274432 KiB

joi2019_ho_t1

#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 5010
#define fi first
#define se second
#define pb emplace_back
#define en cout<<"\n";
#define int long long
#define inf 1000000000
#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^(1<<j))
#define onbit(i,j) (i|(1<<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;
int n,m;
char a[N][N];
int ans;
int row1[N][N],row2[N][N],row3[N][N];
int col1[N][N],col2[N][N],col3[N][N];
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;
    fo(i,1,n) fo(j,1,m)
    {
        cin >> a[i][j];
        row1[i][j] = row1[i][j - 1];
        row2[i][j] = row2[i][j - 1];
        row3[i][j] = row3[i][j - 1];
        if(a[i][j] == 'J') row1[i][j]++;
        if(a[i][j] == 'O') row2[i][j]++;
        if(a[i][j] == 'I') row3[i][j]++;
    }
    fo(j,1,m)
    {
        fo(i,1,n)
        {
            col1[i][j] = col1[i - 1][j];
            col2[i][j] = col2[i - 1][j];
            col3[i][j] = col3[i - 1][j];
            if(a[i][j] == 'J') col1[i][j]++;
            if(a[i][j] == 'O') col2[i][j]++;
            if(a[i][j] == 'I') col3[i][j]++;
        }
    }
    fo(i,1,n) fo(j,1,m)
    {
        if(a[i][j] == 'J')
        {
//            cout << i << ' ' << j << "\n";
            ans += (row2[i][m] - row2[i][j - 1]) * (col3[n][j] - col3[i - 1][j]);
        }
    }
    cout << ans;
}

Compilation message (stderr)

joi2019_ho_t1.cpp:27:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   27 | main()
      | ^~~~
joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:32:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |        freopen(name".inp","r",stdin);
      |        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t1.cpp:33:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |        freopen(name".out","w",stdout);
      |        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 0 / 50