Submission #1057385

#	Time	Username	Problem	Language	Result	Execution time	Memory
1057385		ljtunas	스파이 (JOI13_spy)	C++14	100 / 100	150 ms	64852 KiB

spy

#include <bits/stdc++.h>// "i will win voi25"
using namespace std;

#define fi first
#define se second
#define Forv(v, h)    for(auto &v : h)
#define For(i, a, b)  for(int i = a; i <= b; ++i)
#define Ford(i, a, b) for(int i = a; i >= b; --i)
#define all(h)        h.begin(), h.end()
#define reset(h, v)   (memset(h, v, sizeof(h)))
#define c_bit(i)       __builtin_popcountll(i)
#define Bit(mask, i)    ((mask >> i) & 1)
#define onbit(mask, i)  ((mask) bitor (1LL << i))
#define offbit(mask, i) ((mask) &~ (1LL << i))

using ll  = long long;
using ii  = pair<ll, ll>;
using vi  = vector<ll>;
using vvi = vector<vi>;
using vii = vector<ii>;

template <class X, class Y> bool maximize(X &a, const Y &b)
{
    if(a < b) return a = b, true;
    return false;
}

template <class X, class Y> bool minimize(X &a, const Y &b)
{
    if(a > b) return a = b, true;
    return false;
}

// #define int long long

const int dx[] = {0, -1, +1, 0}, dy[] = {-1, 0, 0, +1};
const ll oo = 1e18 + 1, base = 311, block = 500;
const ll MOD = 1e9 + 7;
const int MAXN = 3e3  + 5;

int n, m;

int a[MAXN], b[MAXN], cnt[MAXN][MAXN], dp[MAXN][MAXN];

int solve (int i, int j)
{
    if (!i || !j) return 0ll;
    if (~dp[i][j]) return dp[i][j];
    int res = cnt[i][j];
    res += solve(a[i], j) + solve(i, b[j]) - solve(a[i], b[j]);
    return dp[i][j] = res;
}

void process()
{
    cin >> n >> m;
    For (i, 1, n) {
        cin >> a[i] >> b[i];
    }
    reset(dp, -1);
    For (i, 1, m) {
        int x, y;
        cin >> x >> y;
        cnt[x][y]++;
    }
    For (i, 1, n) cout << solve(i, i) << '\n';
}

int32_t main()
{
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    #define name "a"
    if (fopen(name".inp", "r")) {
        freopen(name".inp", "r", stdin);
        freopen(name".out", "w", stdout);
    }
    //int tc = 1; cin >> tc; while (tc--)
    process(); // -> ac
    cerr << "\nTime elapsed: " << (1.0 * clock() / CLOCKS_PER_SEC) << " s.\n";
    return 0;
}

Compilation message (stderr)

spy.cpp: In function 'int32_t main()':
spy.cpp:74:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   74 |         freopen(name".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
spy.cpp:75:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   75 |         freopen(name".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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