Submission #1332831

#	Time	Username	Problem	Language	Result	Execution time	Memory
1332831		retarde	Coin Collecting (JOI19_ho_t4)	C++20	100 / 100	38 ms	3580 KiB

joi2019_ho_t4

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

#define pb push_back
#define pf push_front
#define mp make_pair
#define fi first
#define se second
#define int long long
#define all(x) (x).begin(), (x).end()

typedef long double ld;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<bool> vb;
typedef vector<vector<int>> vvi;
typedef vector<vector<bool>> vvb;
typedef vector<vector<ll>> vvll;
typedef vector<string> vs;
typedef vector<vector<string>> vvs;
typedef vector<char> vc;
typedef vector<vector<char>> vvc;
typedef map<int, int> mii;
typedef unordered_map<int, int> umii;

const int mod = 1e9 + 7;
const int inf = INTMAX_MAX;
const bool tc = false;

int cnt[400005][4];

inline void solve() {
    int n; cin >> n; int ans = 0;
    for (int i = 0; i < 2 * n; i++) {
        int x, y;
        cin >> x >> y;
        if (x < 1) {ans += 1-x; x=1;}
        if (x > n) {ans += x-n; x=n;}
        if (y<1) {ans += 1-y; y=1;}
        if (y>2) {ans += y-2; y=2;}
        cnt[x][y]++;
    }
    
    int cnta = 0, cntb = 0;
    for (int i = 1; i <= n; i++) {
        cnt[i][1]--; cnt[i][2]--;
        cnta += cnt[i][1]; cntb += cnt[i][2];
        if (cnta < 0 && cntb > 0) {
            int amt = min(cntb, -cnta);
            ans += amt;
            cntb -= amt;
            cnta += amt;
        } else if (cnta > 0 && cntb < 0) {
            int amt = min(-cntb, cnta);
            ans += amt;
            cntb += amt;
            cnta -= amt;
        }
        ans += abs(cnta + cntb);
    }
    cout << ans << '\n';
}

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

signed main() {
    ios::sync_with_stdio(false);
    cout.tie(0);
    cin.tie(0);
    //setIO();

    int t = 1;
    if (tc) {
        cin >> t;
    }

    while (t--) {
        solve();
    }
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'void setIO(std::string)':
joi2019_ho_t4.cpp:68:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t4.cpp:69:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 29 / 29
• Subtask 3: 63 / 63