Submission #1292102

#	Time	Username	Problem	Language	Result	Execution time	Memory
1292102		wedonttalkanymore	Coin Collecting (JOI19_ho_t4)	C++20	100 / 100	33 ms	5140 KiB

joi2019_ho_t4

#include <bits/stdc++.h>
/*
    Ngay hay dem
    Voi troi giac mo em dem
*/
using namespace std;
using ll = long long;

#define int long long
#define pii pair<ll, ll>
#define fi first
#define se second

const ll N = 2e5 + 5, inf = 1e18, mod = 1e9 + 7, block = 320, lim = 19;

int n, x[N], y[N];
int pre[N][2];

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    if (fopen(".inp", "r")) {
        freopen(".inp", "r", stdin);
        freopen(".out", "w", stdout);
    }
    cin >> n;
    int ans = 0;
    for (int i = 1; i <= 2 * n; i++) {
        cin >> x[i] >> y[i];
        if (x[i] >= n) {
            ans += x[i] - n;
            x[i] = n;
        }
        else if (x[i] < 1) {
            ans += 1 - x[i];
            x[i] = 1;
        }
        if (y[i] >= 2) {
            ans += y[i] - 2;
            y[i] = 2;
        }
        else if (y[i] < 1) {
            ans += 1 - y[i];
            y[i] = 1;
        }
        pre[x[i]][y[i] - 1]++;
    }
    for (int i = 1; i <= n; i++) {
        pre[i][0]--, pre[i][1]--;
        if (pre[i][0] * pre[i][1] < 0) {
            if (pre[i][0] < 0) {
                int val = min(abs(pre[i][0]), pre[i][1]);
                pre[i][0] += val;
                pre[i][1] -= val;
                ans += val;
            }
            if (pre[i][1] < 0) {
                int val = min(abs(pre[i][1]), pre[i][0]);
                pre[i][0] -= val;
                pre[i][1] += val;
                ans += val;
            }
        }
        ans += abs(pre[i][0]) + abs(pre[i][1]);
        pre[i + 1][0] += pre[i][0];
        pre[i + 1][1] += pre[i][1];
    }
    cout << ans;
    return 0;
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen(".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
joi2019_ho_t4.cpp:24:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         freopen(".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~

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