Submission #142790

#	Time	Username	Problem	Language	Result	Execution time	Memory
142790		gs18103	스파이 (JOI13_spy)	C++14	100 / 100	373 ms	40436 KiB

spy

#include <bits/stdc++.h>
#define fi first
#define se second
#define all(v) (v).begin(), (v).end()
#define eb emplace_back
#define fastio ios::sync_with_stdio(false); cin.tie(NULL)
#define INF 2000000000;
#define LINF 1000000000000000000LL
#define mod 1000000007

using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;

int dp[2020][2020], cnt[2020][2020], pj[2020], pi[2020];
bool chk[2020][2020];

int f(int i, int j) {
	if(i == 0 || j == 0) return 0;
	if(chk[i][j]) return dp[i][j];
	chk[i][j] = true;
	int temp = pj[j];
	dp[i][j] += f(pi[i], j);
	dp[i][j] += f(i, pj[j]);
	dp[i][j] -= f(pi[i], pj[j]);
	dp[i][j] += cnt[i][j];
	return dp[i][j];
}

int main() {
	fastio;
	int n, m;
	cin >> n >> m;
	for(int i = 1, u, v; i <= n; i++) {
		cin >> u >> v;
		pj[i] = u;
		pi[i] = v;
	}
	for(int i = 1; i <= m; i++) {
		int r, s;
		cin >> r >> s;
		cnt[s][r]++;
	}
	for(int i = 1; i <= n; i++) {
		cout << f(i, i) << '\n';
	}
}

Compilation message (stderr)

spy.cpp: In function 'int f(int, int)':
spy.cpp:23:6: warning: unused variable 'temp' [-Wunused-variable]
  int temp = pj[j];
      ^~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 70 / 70