Submission #801414

#	Time	Username	Problem	Language	Result	Execution time	Memory
801414		mindiyak	Bitaro the Brave (JOI19_ho_t1)	C++17	20 / 100	7 ms	2772 KiB

joi2019_ho_t1

#pragma GCC optimize("O3")
#pragma GCC target("sse4")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef pair<ld, ld> pd;
typedef vector<int> vi;
typedef vector<char> vc;
typedef vector<bool> vb;
typedef vector<vector<int>> vvi;
typedef vector<vc> vvc;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
#define FOR(i, a, b) for (ll i = a; i < (b); i++)
#define F0R(i, a) for (ll i = 0; i < (a); i++)
#define FORd(i, a, b) for (ll i = (b)-1; i >= a; i--)
#define F0Rd(i, a) for (ll i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto &a : x)
#define uid(a, b) uniform_int_distribution<int>(a, b)(rng)
#define len(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define fst first
#define nl endl
#define sec second
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define ins insert
#define endl "\n"
const int MOD = 1000000007;
const int MX = INT_MAX;
const int MN = INT_MIN;
void init()
{
#ifndef ONLINE_JUDGE
    freopen("input.in", "r", stdin);
    freopen("output.out", "w", stdout);
#endif
}
void fastIO()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
}

void solve()
{
    int h,w;cin>>h>>w;
    vvc arr (h,vc(w));
    vvi o_counter (h,vi(w+1,0));
    vvi i_counter (h+1,vi(w,0));
    FOR(i,0,h)FOR(j,0,w)cin>>arr[i][j];

    FOR(i,0,h){
        int sum=0;
        FOR(j,0,w){
            if(arr[i][j]=='O')sum++;
            o_counter[i][j]=sum;
        }o_counter[i][w]=sum;
    }

    FOR(i,0,w){
        int sum=0;
        FOR(j,0,h){
            if(arr[j][i]=='I')sum++;
            i_counter[j][i]=sum;
        }i_counter[h][i]=sum;
    }

    // FOR(i,0,h){FOR(j,0,w){cout<<arr[i][j];}cout << endl;}
    // cout<<endl;
    // FOR(i,0,h){FOR(j,0,w+1){cout<<o_counter[i][j]<<" ";}cout << endl;}
    // cout<<endl;
    // FOR(i,0,h+1){FOR(j,0,w){cout<<i_counter[i][j]<<" ";}cout << endl;}
    // cout<<endl;

    int ans=0;
    FOR(i,0,h){
        FOR(j,0,w){
            if(arr[i][j]=='J'){
                ans += (o_counter[i][w]-o_counter[i][j])*
                        (i_counter[h][j]-i_counter[i][j]);
            }
        }
    }
    cout << ans << endl;
}


int main()
{
    fastIO();
    // init();
    int t = 1;
    // cin >> t;
    while (t--)
        solve();
    return 0;
}

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'void init()':
joi2019_ho_t1.cpp:43:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |     freopen("input.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t1.cpp:44:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |     freopen("output.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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