Submission #153321

#	Time	Username	Problem	Language	Result	Execution time	Memory
153321		mhy908	Coin Collecting (JOI19_ho_t4)	C++14	100 / 100	78 ms	4988 KiB

joi2019_ho_t4

#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define llinf 8987654321987654321
#define inf 1987654321
using namespace std;
typedef long long LL;
typedef pair<int, int> pii;
typedef pair<LL, LL> pll;
LL ans;
int cnt[100010][3], temp1, temp2;
int n;
int main()
{
    scanf("%d", &n);
    for(int i=1; i<=2*n; i++){
        LL x, y;
        scanf("%lld %lld", &x, &y);
        if(x<1)ans+=1-x, x=1;
        if(x>n)ans+=x-(LL)n, x=(LL)n;
        if(y<1)ans+=1-y, y=1;
        if(y>2)ans+=y-2, y=2;
        cnt[(int)x][(int)y]++;
    }
    for(int i=1; i<=n; i++){
        temp1+=cnt[i][1]-1;
        temp2+=cnt[i][2]-1;
        if(temp1>0&&temp2<0){
            int t=min(temp1, -temp2);
            ans+=(LL)t;
            temp1-=t;
            temp2+=t;
        }
        if(temp1<0&&temp2>0){
            int t=min(-temp1, +temp2);
            ans+=(LL)t;
            temp1+=t;
            temp2-=t;
        }
        ans+=llabs((LL)temp1)+llabs((LL)temp2);
    }
    printf("%lld", ans);
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:16:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &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("%lld %lld", &x, &y);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~

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