Submission #225228

#	Time	Username	Problem	Language	Result	Execution time	Memory
225228		MKopchev	Coin Collecting (JOI19_ho_t4)	C++14	100 / 100	95 ms	4984 KiB

joi2019_ho_t4

#include<bits/stdc++.h>
using namespace std;
const int nmax=2e5+42;

int seen[nmax][3];

int active[3];

int main()
{
    long long output=0;

    int n,x,y;

    scanf("%i",&n);

    for(int i=1;i<=2*n;i++)
    {
        scanf("%i%i",&x,&y);

        if(x>n){output+=x-n;x=n;}
        if(x<1){output+=1-x;x=1;}

        if(y>2){output+=y-2;y=2;}
        if(y<1){output+=1-y;y=1;}

        seen[x][y]++;
    }

    for(int i=1;i<=n;i++)
    {
        active[1]+=seen[i][1]-1;
        active[2]+=seen[i][2]-1;

        if(active[1]>0&&active[2]<0)
        {
            int add=min(active[1],-active[2]);
            active[1]-=add;
            active[2]+=add;
            output+=add;
        }
        if(active[1]<0&&active[2]>0)
        {
            int add=min(-active[1],active[2]);
            active[1]+=add;
            active[2]-=add;
            output+=add;
        }

        output+=abs(active[1])+abs(active[2]);
    }
    printf("%lld\n",output);
    return 0;
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:15:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i",&n);
     ~~~~~^~~~~~~~~
joi2019_ho_t4.cpp:19:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i%i",&x,&y);
         ~~~~~^~~~~~~~~~~~~~

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