Submission #1277011

#	Time	Username	Problem	Language	Result	Execution time	Memory
1277011		trandangquang	Coin Collecting (JOI19_ho_t4)	C++20	37 / 100	10 ms	2384 KiB

joi2019_ho_t4

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

#define foru(i,a,b) for(int i=(a); i<=(b); ++i)
#define ford(i,a,b) for(int i=(a); i>=(b); --i)
#define rep(i,a) for(int i=0; i<(a); ++i)
#define sz(a) (int)(a).size()
#define all(a) (a).begin(),(a).end()
#define bit(s,i) (((s)>>(i))&1)
#define ii pair<int,int>
#define fi first
#define se second
#define pb push_back
#define eb emplace_back
#define ll long long
#define _ << " " <<

template <class X, class Y> bool maxi(X &x, Y y){return x<y?x=y,true:false;}
template <class X, class Y> bool mini(X &x, Y y){return x>y?x=y,true:false;}

const int N=1e5+5;

int n,x[N],y[N],cnt[N][3]; ll res;

void solve(){
    cin>>n;
    foru(i,1,n<<1){
        cin>>x[i]>>y[i];

        int nx,ny;
        if(x[i]<1) nx=1;
        else if(x[i]>n) nx=n;
        else nx=x[i];

        if(y[i]<1) ny=1;
        else if(y[i]>2) ny=2;
        else ny=y[i];
        cnt[nx][ny]++;
        res=res+abs(nx-x[i])+abs(ny-y[i]);
    }

    foru(i,1,n)foru(j,1,2){
        cnt[i][j]--;
    }
//    foru(i,1,2){
//        foru(j,1,n){
//            cout<<cnt[j][i]<<" ";
//        }
//        cout<<'\n';
//    }
    foru(i,1,n){
        cnt[i][1]+=cnt[i-1][1];
        cnt[i][2]+=cnt[i-1][2];

        if(cnt[i][1]>0 && cnt[i][2]<0){
            int t=min(cnt[i][1],-cnt[i][2]);
            cnt[i][1]-=t; cnt[i][2]+=t;
            res+=t;
        } else if(cnt[i][1]<0 && cnt[i][2]>0){
            int t=min(-cnt[i][1],cnt[i][2]);
            cnt[i][1]+=t; cnt[i][2]-=t;
            res+=t;
        }
        res+=abs(cnt[i][1])+abs(cnt[i][2]);
    }
    cout<<res<<'\n';
}

int32_t main(){
    #define task "test"
    if(fopen(task".inp","r")){
        freopen(task".inp","r",stdin);
        freopen(task".out","w",stdout);
    }
    cin.tie(0)->sync_with_stdio(0);

    int tc=1; //cin>>tc;
    rep(i,tc){
        solve();
    }
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int32_t main()':
joi2019_ho_t4.cpp:72:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t4.cpp:73:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   73 |         freopen(task".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 29 / 29
• Subtask 3: 0 / 63