Submission #717828

#	Time	Username	Problem	Language	Result	Execution time	Memory
717828		vjudge1	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	67 ms	388 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { os << '{'; string sep; for (const T &x:v) os << sep << x, sep = ", "; return os << '}'; }

void dbg_out() { cerr << endl; }
template<typename Head, typename ... Tail> void dbg_out(Head H, Tail ... T) { cerr << ' ' << H; dbg_out(T...); }
#ifdef LOCAL
#define dbg(...) cerr << '(' << #__VA_ARGS__ << '):', dbg_out(__VA_ARGS__)
#else
#define dbg(...)
#endif

#define ll long long
#define pii pair<int, int>
#define mii map<int, int>
#define vii vector<int, int>
#define gcd(a,b) __gcd(a,b)
#define lcm(a,b) (a*(b/gcd(a,b)))
#define all(x) (x).begin() , (x).end()

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    ll n, m, res = 0; 
    cin >> n >> m;
    ll a[m] = {0};
    for (ll i = 0; i < n; i++) {
        string s;
        cin >> s;
        ll k = 0; 
        for (ll j = m - 1; j >= 0; j--) {
            if (s[j] == 'O') k++;
            else if (s[j] == 'J') a[j] += k;
            else res += a[j];
        }
    }
    cout << res;
    return 0;
}

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