Submission #144867

#	Time	Username	Problem	Language	Result	Execution time	Memory
144867		12tqian	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	247 ms	108016 KiB

joi2019_ho_t1

#pragma comment(linker, "/stack:200000000")
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;

const double PI = 4 * atan(1);

#define sz(x) (int)(x).size()
#define ll long long
#define ld long double
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define pii pair <int, int>
#define vi vector<int>
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()
#define vpi vector<pair<int, int>>
#define vpd vector<pair<double, double>>
#define pd pair<double, double>

#define f0r(i,a) for(int i=0;i<a;i++)
#define f1r(i,a,b) for(int i=a;i<b;i++)
#define trav(a, x) for (auto& a : x)

template<typename A, typename B> ostream& operator<<(ostream &cout, pair<A, B> const &p) { return cout << "(" << p.f << ", " << p.s << ")"; }
template<typename A> ostream& operator<<(ostream &cout, vector<A> const &v) {
  cout << "["; for(int i = 0; i < v.size(); i++) {if (i) cout << ", "; cout << v[i];} return cout << "]";
}

void fast_io(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    cout.tie(NULL);
}
void io(string taskname){
    string fin = taskname + ".in";
    string fout = taskname + ".out";
    const char* FIN = fin.c_str();
    const char* FOUT = fout.c_str();
    freopen(FIN, "r", stdin);
    freopen(FOUT, "w", stdout);
    fast_io();
}
const int MAX = 3e3 + 5;
int orb[MAX][MAX];
int ingot[MAX][MAX];
vpi jewel;
int main(){
    fast_io();
    int h, w;
    cin >> h >> w;
    string temporary;
    getline(cin, temporary);
    f0r(i, h){
        string s;
        getline(cin, s);
        f0r(j, w){
            if(s[j] == 'J'){
                jewel.eb(mp(i, j));
            }
            else if(s[j] == 'O'){
                orb[i][j]++;
            }
            else{
                ingot[i][j]++;
            }
        }
    }
    f0r(i, h){
        f1r(j,1, w){
            orb[i][j] += orb[i][j-1];
        }
    }
    f0r(i, w){
        f1r(j,1, h){
            ingot[j][i] += ingot[j-1][i];
        }
    }
    ll ans = 0;
    for(auto p: jewel){
        int i = p.f;
        int j = p.s;
        ll v1 = orb[i][w-1] - orb[i][j];
        ll v2 = ingot[h-1][j] - ingot[i][j];
        ans += v1*v2;
    }
    cout << ans << endl;
    return 0;
}

Compilation message (stderr)

joi2019_ho_t1.cpp:1:0: warning: ignoring #pragma comment  [-Wunknown-pragmas]
 #pragma comment(linker, "/stack:200000000")
 
joi2019_ho_t1.cpp: In function 'void io(std::__cxx11::string)':
joi2019_ho_t1.cpp:52:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen(FIN, "r", stdin);
     ~~~~~~~^~~~~~~~~~~~~~~~~
joi2019_ho_t1.cpp:53:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen(FOUT, "w", stdout);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~

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