Submission #1230316

#	Time	Username	Problem	Language	Result	Execution time	Memory
1230316		hainam2k9	Coin Collecting (JOI19_ho_t4)	C++20	100 / 100	24 ms	1224 KiB

joi2019_ho_t4

#include <bits/stdc++.h>
#define tt cin.tie(0), cout.tie(0), ios_base::sync_with_stdio(0)
#define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
#define ll long long
#define ull unsigned long long
#define i128 __int128
#define db long double
#define sz(a) ((int)(a).size())
#define pb emplace_back
#define pf emplace_front
#define pob pop_back
#define pof pop_front
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define ins emplace
#define mp make_pair
using namespace std;
const int MOD = 1e9+7, MAXN = 1e5+5;
const string NAME = "";
int n,cnt[2][MAXN],sum[2];
ll rs=0;
int main()
{
    tt;
    if(fopen((NAME + ".INP").c_str(), "r")) fo;
    cin >> n;
    for(int i = 1; i<=n*2; ++i){
        int x,y;
        cin >> x >> y;
        swap(x,y);
        if(x>=2) rs+=x-2, x=2;
        else rs+=1-x, x=1;
        if(y<1) rs+=1-y, y=1;
        else if(y>n) rs+=y-n, y=n;
        ++cnt[x-1][y];
    }
    for(int i = 1; i<=n; ++i){
        sum[0]+=cnt[0][i]-1, sum[1]+=cnt[1][i]-1;
        while(sum[0]>0&&sum[1]<0) ++rs, --sum[0], ++sum[1];
        while(sum[1]>0&&sum[0]<0) ++rs, --sum[1], ++sum[0];
        rs+=abs(sum[0])+abs(sum[1]);
    }
    cout << rs;
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:3:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t4.cpp:27:45: note: in expansion of macro 'fo'
   27 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~
joi2019_ho_t4.cpp:3:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |                                                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t4.cpp:27:45: note: in expansion of macro 'fo'
   27 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~

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