Submission #557630

#	Time	Username	Problem	Language	Result	Execution time	Memory
557630		krit3379	Coin Collecting (JOI19_ho_t4)	C++17	100 / 100	56 ms	4900 KiB

joi2019_ho_t4

#include<bits/stdc++.h>
using namespace std;
#define N 100005
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

int cnt[3][N],a,b;
long long ans;

int main(){
    int n,i,x,y;
    scanf("%d",&n);
    for(i=1;i<=2*n;i++){
        scanf("%d %d",&x,&y);
        if(x<1)ans+=1-x,x=1;
        else if(x>n)ans+=x-n,x=n;
        if(y<1)ans+=1-y,y=1;
        else if(y>2)ans+=y-2,y=2;
        cnt[y][x]++;
    }
    for(i=1;i<=n;i++){
        a+=cnt[1][i]-1,b+=cnt[2][i]-1;
        while(a>0&&b<0)a--,b++,ans++;
        while(a<0&&b>0)a++,b--,ans++;
        ans+=abs(a)+abs(b);
    }
    printf("%lld",ans);
    return 0;
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
joi2019_ho_t4.cpp:14:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         scanf("%d %d",&x,&y);
      |         ~~~~~^~~~~~~~~~~~~~~

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