Submission #226338

#	Time	Username	Problem	Language	Result	Execution time	Memory
226338		Ruxandra985	Coin Collecting (JOI19_ho_t4)	C++14	100 / 100	83 ms	9212 KiB

joi2019_ho_t4

#include <bits/stdc++.h>

using namespace std;
pair <long long,long long> v[200010];
long long f[200010][3];

long long modul (long long x){
    return max(x , -x);
}

int main()
{
    FILE *fin = stdin;
    FILE *fout = stdout;
    long long i , n , j , under1 , under2 , cnt1 , cnt2 , ic , jc;
    long long sol = 0;
    fscanf (fin,"%lld",&n);
    for (i = 1 ; i <= 2 * n ; i++){
        fscanf (fin,"%lld%lld",&v[i].first,&v[i].second);

        /// acum reduci v ul

        if (v[i].second <= 1){

            sol = sol + 1 - v[i].second;
            v[i].second = 1;

        }
        else {

            sol = sol + v[i].second - 2;
            v[i].second = 2;

        }

        if (v[i].first < 1){

            sol = sol + 1 - v[i].first;
            v[i].first = 1;

        }
        else if (v[i].first > n){

            sol = sol + v[i].first - n;
            v[i].first = n;

        }

        f[v[i].first][v[i].second]++;


    }
    /// renunt la heap gata ok am inteles, nu e bn:)))))
    /// ok o sa renunt si la celalalt greedy :(((

    ic = 1;
    jc = 1;

    for (i = 1 ; i <= n ; i++){
        for (j = 1 ; j <= f[i][1] + f[i][2] ; j++){

            sol = sol + modul(i - ic);
            jc++;
            if (jc == 3){
                jc = 1;
                ic++;
            }

        }
    }

    under1 = under2 = 0;
    cnt1 = cnt2 = 0;

    for (i = 1 ; i <= n ; i++){

        under1++;
        under2++;

        cnt1 += f[i][1];
        cnt2 += f[i][2];

        while (under1 && cnt1){
            under1--;
            cnt1--;
        }
        while (under2 && cnt2){
            under2--;
            cnt2--;
        }
        while (under1 && cnt2){
            under1--;
            cnt2--;
            sol++;
        }
        while (under2 && cnt1){
            under2--;
            cnt1--;
            sol++;
        }


    }
    fprintf (fout,"%lld",sol);

    return 0;
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:17:12: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     fscanf (fin,"%lld",&n);
     ~~~~~~~^~~~~~~~~~~~~~~
joi2019_ho_t4.cpp:19:16: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         fscanf (fin,"%lld%lld",&v[i].first,&v[i].second);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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