Submission #1112301

#TimeUsernameProblemLanguageResultExecution timeMemory
1112301whyalwaysmezzzBitaro the Brave (JOI19_ho_t1)C++14
100 / 100
306 ms207192 KiB
//Nếu thế giới có 8 tỷ người yêu em, anh là một trong số họ
//Nếu thế giới có 1 người yêu em, thì anh chính là người đó
//Nếu thế giới không còn ai yêu em, thì có nghĩa là anh đã chết </3
//dyk19b1
#include <bits/stdc++.h>
#define int long long
#define fi first
#define se second
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; i++)
#define FORD(i, b, a) for (int i = (b), _a = (a); i >= _a; i--)
#define BIT(mask,i) ((mask >> i) & 1ll )
#define endl '\n'  
#define all(x) x.begin(),x.end()
#define ii pair <int,int> 
using namespace std;
#define read doc() 
int doc () {bool minus = false;int result = 0;char ch;ch = getchar();while (true) {if (ch == '-') break;if (ch >= '0' && ch <= '9') break;ch = getchar();}if (ch == '-') minus = true; else result = ch-'0';while (true) {ch = getchar();if (ch < '0' || ch > '9') break;result = result*10 + (ch - '0');}if (minus)return -result;else return result;}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
template <class T> T rand(T l, T h) { return uniform_int_distribution <T> (l, h) (rng); } 
template <class T> T rand(T h) { return uniform_int_distribution <T> (0, h - 1) (rng); }
template<class X, class Y>bool minimize(X &x, const Y &y) {if (x > y) {x = y;return true;} else return false;}
template<class X, class Y>bool maximize(X &x, const Y &y) {if (x < y) {x = y;return true;} else return false;}
const long long oo = 1e18;
const int N = 3005+5;
const int MOD = 1e9+7;
vector <ii> J;
int O[N][N],I[N][N];
void TnKh()
{
	int n,m;
	cin >> n >> m;
	FOR(i,1,n) FOR(j,1,m) 
	{
		char x;
		cin >> x;

    	if (x == 'J') J.push_back({i,j});
    	if (x == 'O') O[i][j]++;
    	if (x == 'I') I[i][j]++;
    }
    FOR(i,1,n) 
    FORD(j,m-1,1) 
    {
    	O[i][j] += O[i][j+1];
    }
    FOR(j,1,m)
    FORD(i,n-1,1)  
    {
    	I[i][j] += I[i+1][j];
    }
    int ans = 0;
    for(auto [i,j]:J)
    {
    	ans += O[i][j+1] * I[i+1][j];
    }
    cout << ans;
    return;
}
#define TASK "task"
signed main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
 //   freopen(TASK".inp","r",stdin);freopen(TASK".out","w",stdout);
    int Dyk19b1 = 1;
    // cin >> Dyk19b1;
    while (Dyk19b1--) TnKh();
    return 0;       
}





Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'void TnKh()':
joi2019_ho_t1.cpp:52:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   52 |     for(auto [i,j]:J)
      |              ^
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