oj.uz

Submission #605769

# Submission time Handle Problem Language Result Execution time Memory
605769 2022-07-26T01:49:59 Z SanguineChameleon Count Squares (CEOI19_countsquares) C++14
100 / 100
 1767 ms 105840 KB 
// BEGIN BOILERPLATE CODE

#include <bits/stdc++.h>
using namespace std;

#ifdef KAMIRULEZ
	const bool kami_loc = true;
	const long long kami_seed = 69420;
#else
	const bool kami_loc = false;
	const long long kami_seed = chrono::steady_clock::now().time_since_epoch().count();
#endif

const string kami_fi = "kamirulez.inp";
const string kami_fo = "kamirulez.out";
mt19937_64 kami_gen(kami_seed);

long long rand_range(long long rmin, long long rmax) {
	uniform_int_distribution<long long> rdist(rmin, rmax);
	return rdist(kami_gen);
}

void file_io(string fi, string fo) {
	if (fi != "" && (!kami_loc || fi == kami_fi)) {
		freopen(fi.c_str(), "r", stdin);
	}
	if (fo != "" && (!kami_loc || fo == kami_fo)) {
		freopen(fo.c_str(), "w", stdout);
	}
}

void set_up() {
	if (kami_loc) {
		file_io(kami_fi, kami_fo);
	}
	ios_base::sync_with_stdio(0);
	cin.tie(0);
}

void just_do_it();

void just_exec_it() {
	if (kami_loc) {
		auto pstart = chrono::steady_clock::now();
		just_do_it();
		auto pend = chrono::steady_clock::now();
		long long ptime = chrono::duration_cast<chrono::milliseconds>(pend - pstart).count();
		string bar(50, '=');
		cout << '\n' << bar << '\n';
		cout << "Time: " << ptime << " ms" << '\n';
	}
	else {
		just_do_it();
	}
}

int main() {
	set_up();
	just_exec_it();
	return 0;
}

// END BOILERPLATE CODE

// BEGIN MAIN CODE

const int ms = 2e3 + 20;
int a[ms];
int b[ms];

void just_do_it() {
	int n, m;
	cin >> n >> m;
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	for (int i = 0; i < m; i++) {
		cin >> b[i];
	}
	map<int, int> cc;
	for (int i = 0; i < n; i++) {
		for (int j = i + 1; j < n; j++) {
			cc[a[j] - a[i]]++;
		}
	}
	long long res = 0;
	for (int i = 0; i < m; i++) {
		for (int j = i + 1; j < m; j++) {
			int d = b[j] - b[i];
			res += cc[d];
		}
	}
	cout << res;
}

// END MAIN CODE

Compilation message

countsquares.cpp: In function 'void file_io(std::string, std::string)':
countsquares.cpp:25:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |   freopen(fi.c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
countsquares.cpp:28:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |   freopen(fo.c_str(), "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 138 ms 17128 KB Output is correct
7 Correct 136 ms 17100 KB Output is correct
8 Correct 158 ms 17092 KB Output is correct
9 Correct 126 ms 16604 KB Output is correct
10 Correct 10 ms 596 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 138 ms 17128 KB Output is correct
7 Correct 136 ms 17100 KB Output is correct
8 Correct 158 ms 17092 KB Output is correct
9 Correct 126 ms 16604 KB Output is correct
10 Correct 10 ms 596 KB Output is correct
11 Correct 1767 ms 105840 KB Output is correct
12 Correct 1717 ms 105704 KB Output is correct
13 Correct 1688 ms 105744 KB Output is correct
14 Correct 1663 ms 104472 KB Output is correct
15 Correct 65 ms 1024 KB Output is correct