Submission #1114301

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1114301	2024-11-18T13:49:40 Z	coolsentenceidontremember	Sateliti (COCI20_satellti)	C++17	110 / 110	594 ms	37744 KB

Main

/*


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#*....;:....*##;....:#*+S+....,SS,,,,,*%;;:;?S,...+%,...,%*....?@S,....*#?*?S;....:@?.....?@%,....*@?,...,++,.,.,S*:,,+S;....:S%**+;*S:....;#*;*S;....;*:..,.*SS*....:S+,;S;....;#%+;%?.....%#,...,%?,..
SS,...,,...,SS#;....:??*#*....,S%.....?%;:;;%S,...+#;.,.:#*.,..?@S,....+%?*?#;.,..:S*.....?#%,....*@+...,,::,....?%:,,+S;....:S+:,,:*S:....;%?*S%,...,:::,...:##?....:S+,;S;....:??*+S?.....%#,....%?,..
%#+........+#S#;.......,S#+,...::..,:*S?+++*SS,...+@*...;@*....?@%,........+@;....,,,....:%S%,....*S,....*##+....;S+,,+S;....:S+::::*S:.......,#*....,S#%,...,?@?....:S;.;S;........:#?.....%#,....%?,..
%SS********%#S#?********S##S?*++++*?SS%?????%S****?#S***S#%****%SS*********?#?*********??%?*%*****%S*****%%%?*****%*;;+%?****?%*;+;+*S?********#?****?S%%*****%#S*****%+:;%?*********S%*****%S*****%*:::
*/



#include "bits/stdc++.h"
#define ll long long
#define ld long double
#define ff first
#define ss second
#define pii pair<int, int>
#define mp make_pair

using namespace std;

void setIO(string s = ""){
 ios_base::sync_with_stdio(false);
 cin.tie(nullptr);
 cout.tie(nullptr);
 if (!s.empty()){
	freopen((s+".in").c_str(), "r", stdin);
	freopen((s+".out").c_str(), "w", stdout);
	}
}



struct chash {
	const double PI = acos(-1);
	const uint64_t C = (2e18 * PI)+71;
	const uint32_t random = chrono::steady_clock::now().time_since_epoch().count();
	size_t operator()(ll x) const {
		return __builtin_bswap64((x^random)*C);
	} 
};

const int N = 2005;
const ll MOD = 1e9 + 9;
ll P, Q;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
char grid[N][N];
vector<ll> p, q;
ll hsh[N][N];
void generate(const int &n, const int &m){
	p.push_back(1);
	q.push_back(1);
	for (int i = 1; i <= 2*m; i++) p.push_back(p.back()*P%MOD);
	for (int i = 1; i <= 2*n; i++) q.push_back(q.back()*Q%MOD);
	memset(hsh, 0, sizeof hsh);
	for (int i = 1; i <= 2*n; i++){
		for (int j = 1; j <= 2*m; j++){
			hsh[i][j] = (hsh[i-1][j]*Q + hsh[i][j-1]*P - hsh[i-1][j-1]*P%MOD*Q%MOD)%MOD + MOD;
			hsh[i][j] = (hsh[i][j] + grid[i][j])%MOD;
		}
	}
}

ll get_hash(int r1,int c1,int r2,int c2){
	ll ret = hsh[r2][c2];
	ret = (ret - hsh[r1-1][c2]*q[r2-r1+1] - hsh[r2][c1-1]*p[c2-c1+1])%MOD + MOD;
	ret = (ret + hsh[r1-1][c1-1]*q[r2-r1+1]%MOD*p[c2-c1+1]%MOD) % MOD;
	return (ret+MOD)%MOD;
}

int main(){
	setIO();
    int n, m;
    cin >> n >> m;
    for (int i = 1; i <= n; i++){
    	for (int j = 1; j <= m; j++){
    		char c;
    		cin >> c;
    		grid[i][j] = grid[i][j+m] = grid[i+n][j] = grid[i+n][j+m] = c;
		}
	}
	P = uniform_int_distribution<int>(0, MOD-1)(rng);
	Q = uniform_int_distribution<int>(0, MOD-1)(rng);
	generate(n, m);
	pii ans = {1, 1};
	for (int i = 1; i+n-1 <= 2*n; i++){
		for (int j = 1; j + m-1 <= 2*m; j++){
			int l = 1, r = n+1;
			while (l < r){
				int mid = (l+r)/2;
				if (get_hash(i, j, i+mid-1, j+m-1) == get_hash(ans.ff, ans.ss, ans.ff+mid-1, ans.ss+m-1)) l = mid+1;
				else r = mid;
			}
			if (l == n+1) continue;
			int r_dif = l;
			l = 1, r = m+1;
			while (l < r){
				int mid = (l+r)/2;
				if (get_hash(i, j, i+r_dif-1, j + mid - 1) == get_hash(ans.ff, ans.ss, ans.ff + r_dif-1, ans.ss + mid -1)) l = mid+1;
				else r = mid;
			}
			if (l == m+1) continue;
			int c_dif = l;
			if (grid[i+r_dif-1][j+c_dif-1] < grid[ans.ff+r_dif-1][ans.ss+c_dif-1]) ans = mp(i, j);
		}
	}
	for (int i = ans.ff; i <= ans.ff+n-1; i++) {
		for (int j=ans.ss; j <= ans.ss+m-1; j++) cout << grid[i][j];
		cout << '\n';
	}
}

Compilation message

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:138:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  138 |  freopen((s+".in").c_str(), "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:139:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  139 |  freopen((s+".out").c_str(), "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	33360 KB	Output is correct
2	Correct	7 ms	33360 KB	Output is correct
3	Correct	7 ms	33360 KB	Output is correct
4	Correct	7 ms	33360 KB	Output is correct
5	Correct	8 ms	33360 KB	Output is correct
6	Correct	12 ms	33360 KB	Output is correct
7	Correct	11 ms	33360 KB	Output is correct

Subtask #2

40.0 / 40.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	33360 KB	Output is correct
2	Correct	7 ms	33360 KB	Output is correct
3	Correct	7 ms	33360 KB	Output is correct
4	Correct	7 ms	33360 KB	Output is correct
5	Correct	8 ms	33360 KB	Output is correct
6	Correct	12 ms	33360 KB	Output is correct
7	Correct	11 ms	33360 KB	Output is correct
8	Correct	48 ms	33608 KB	Output is correct
9	Correct	14 ms	33364 KB	Output is correct
10	Correct	12 ms	33360 KB	Output is correct
11	Correct	53 ms	33608 KB	Output is correct
12	Correct	53 ms	33608 KB	Output is correct
13	Correct	52 ms	33608 KB	Output is correct
14	Correct	55 ms	33608 KB	Output is correct
15	Correct	55 ms	33712 KB	Output is correct
16	Correct	49 ms	33584 KB	Output is correct
17	Correct	51 ms	33616 KB	Output is correct

Subtask #3

60.0 / 60.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	33360 KB	Output is correct
2	Correct	7 ms	33360 KB	Output is correct
3	Correct	7 ms	33360 KB	Output is correct
4	Correct	7 ms	33360 KB	Output is correct
5	Correct	8 ms	33360 KB	Output is correct
6	Correct	12 ms	33360 KB	Output is correct
7	Correct	11 ms	33360 KB	Output is correct
8	Correct	48 ms	33608 KB	Output is correct
9	Correct	14 ms	33364 KB	Output is correct
10	Correct	12 ms	33360 KB	Output is correct
11	Correct	53 ms	33608 KB	Output is correct
12	Correct	53 ms	33608 KB	Output is correct
13	Correct	52 ms	33608 KB	Output is correct
14	Correct	55 ms	33608 KB	Output is correct
15	Correct	55 ms	33712 KB	Output is correct
16	Correct	49 ms	33584 KB	Output is correct
17	Correct	51 ms	33616 KB	Output is correct
18	Correct	519 ms	37648 KB	Output is correct
19	Correct	19 ms	35920 KB	Output is correct
20	Correct	20 ms	33528 KB	Output is correct
21	Correct	512 ms	37648 KB	Output is correct
22	Correct	594 ms	37656 KB	Output is correct
23	Correct	514 ms	37708 KB	Output is correct
24	Correct	571 ms	37704 KB	Output is correct
25	Correct	528 ms	37744 KB	Output is correct
26	Correct	555 ms	37652 KB	Output is correct
27	Correct	555 ms	37704 KB	Output is correct