제출 #364464

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
364464		farhan132	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	950 ms	107736 KiB

joi2019_ho_t1

/***Farhan132***/

#include <bits/stdc++.h>
 
using namespace std;
 
typedef int ll;
typedef unsigned long long ull;
typedef double dd;
typedef vector<ll> vll;
typedef pair<ll , ll> ii;
typedef vector< ii > vii;
typedef pair < pair < ll , ll > , pair < ll , ll > > cm; 
 
#define ff first
#define ss second
#define pb push_back
#define in insert
#define f0(b) for(int i=0;i<(b);i++)
#define f00(b) for(int j=0;j<(b);j++)
#define f1(b) for(int i=1;i<=(b);i++)
#define f11(b) for(int j=1;j<=(b);j++)
#define f2(a,b) for(int i=(a);i<=(b);i++)
#define f22(a,b) for(int j=(a);j<=(b);j++)
#define sf(a) scanf("%lld",&a)
#define sff(a,b) scanf("%lld %lld", &a , &b)
#define pf(a) printf("%lld\n",a)
#define pff(a,b) printf("%lld %lld\n", a , b)
#define PI 3.14159265359
#define bug printf("**!\n")
#define mem(a , b) memset(a, b ,sizeof(a))
#define front_zero(n) __builtin_clzll(n)
#define back_zero(n) __builtin_ctzll(n)
#define total_one(n) __builtin_popcountll(n)
#define clean fflush(stdout)

const ll mod =  (ll)1e9 + 7;
const ll maxn = (ll)2e5 + 5;
const int nnn = 1048590;
const int inf = numeric_limits<int>::max()-1;
//const ll INF = numeric_limits<ll>::max()-1;
//const ll INF = 1e18;
 
ll dx[]={0,1,0,-1};
ll dy[]={1,0,-1,0};
ll dxx[]={0,1,0,-1,1,1,-1,-1};
ll dyy[]={1,0,-1,0,1,-1,1,-1};

ll track[2][3005][3005];
ll a[3005][3005];

ll n , m;

void work(ll id){
    if(id == 1){
    for(ll i = 1; i <= n; i++){
        for(ll j = m; j >= 1; j--){
            track[0][i][j] = track[0][i][j+1] + ( a[i][j] == id+1);
        }
    }
    }
    if(id == 2){
     for(ll j = 1; j <= m; j++){
        for(ll i = n; i >= 1; i--) track[1][i][j] = track[1][i+1][j] + (a[i][j] == id+1);
     }
    }
    return;
}

void solve(){
    
    cin >> n >> m;
    mem(track, 0);
    mem(a, 0);
    for(ll i = 1; i <= n; i++){
        for(ll j = 1; j <= m; j++){
            char c;
            cin >> c;
            if(c == 'J') a[i][j] = 1;
            if(c == 'O') a[i][j] = 2;
            if(c == 'I') a[i][j] = 3;
        }
    }
    f0(3) work(i);
    long long ans = 0;
    for(ll i = 1; i <= n; i++){
        for(ll j = 1; j <= m; j++){
            if(a[i][j] == 1) ans += 1LL * track[1][i][j] * track[0][i][j];
        }
    }
    cout << ans;

    return;
    
}

 
int main() {
    
    
    #ifdef LOCAL
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
    #else 
     //   freopen("cbarn2.in", "r", stdin);
     //   freopen("cbarn2.out", "w", stdout);
     // ios_base::sync_with_stdio(0); cin.tie(NULL); cout.tie(NULL);
    #endif
    //cout << fixed << setprecision(10);
   // work(maxn);
    //  mem(b,0);
    ll T;
    T=1;
    //cin >> T; 
    //scanf("%lld",&T);
   // ll CT = 0;
    //work();
    while(T--){
        //cout << "Case " << ++CT <<": " ;
        //printf("Case %lld: ",++CT);
        solve();
    }
 
    return 0;
}

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