Submission #14534

#	Time	Username	Problem	Language	Result	Execution time	Memory
14534		dohyun0324	Palembang Bridges (APIO15_bridge)	C++98	100 / 100	163 ms	6536 KiB

bridge

#include<stdio.h>
#include<algorithm>
#include<queue>
using namespace std;
priority_queue<int>q;
priority_queue<int,vector<int>,greater<int> >q2;
char c1,c2;
long long dap,d[3][100010],dap2,dap3;
int t,w2,k,n,x1,x2,w,arr[200010];
struct data{
    int x,y;
    bool operator<(const data&r)const{
        return (x+y)<r.x+r.y;
    }
}a[100010];
void pro(int p)
{
    int c=0;
    long long sum=0,sum2=0,mid=0,i;
    while(q.size()) q.pop();
    while(q2.size()) q2.pop();
    q.push(min(a[1].x,a[1].y)); q2.push(max(a[1].x,a[1].y));
    d[p][1]=abs(a[1].x-a[1].y);
    sum=min(a[1].x,a[1].y); sum2=a[1].x+a[1].y;
    for(i=2;i<=w;i++){
        sum2+=a[i].x+a[i].y;
        if(q.top()>a[i].x){
            sum+=a[i].x-q.top();
            q2.push(q.top()); q.pop(); q.push(a[i].x);
        }
        else q2.push(a[i].x);
        sum+=q2.top(); q.push(q2.top()); q2.pop();
        if(q.top()>a[i].y){
            sum+=a[i].y-q.top();
            q2.push(q.top()); q.pop(); q.push(a[i].y);
        }
        else q2.push(a[i].y);
        mid=q.top();
        d[p][i]=mid*i-sum+(sum2-sum)-mid*i;
    }
}
int main()
{
    int i;
    scanf("%d %d",&k,&n);
    for(i=1;i<=n;i++){
        scanf(" %c %d %c %d",&c1,&x1,&c2,&x2);
        if(c1==c2) dap+=abs(x2-x1);
        else{w++; a[w].x=x1; a[w].y=x2; arr[++w2]=x1; arr[++w2]=x2;}
    }
    dap2=dap;
    sort(a+1,a+w+1); sort(arr+1,arr+w2+1);
    if(k==1 || k==2){
        for(i=1;i<=w2;i++) dap+=abs(arr[i]-arr[w]);
        dap3=dap;
    }
    if(k==2){
        dap=1e+15;
        pro(1); reverse(a+1,a+w+1); pro(2);
        for(i=1;i<=w;i++) dap=min(dap,d[1][i]+d[2][w-i]);
    }
    if(k==2) printf("%lld",min(dap3+w,dap+w+dap2));
    else printf("%lld",dap3+w);
    return 0;
}

Compilation message (stderr)

bridge.cpp: In function 'void pro(int)':
bridge.cpp:18:9: warning: unused variable 'c' [-Wunused-variable]
     int c=0;
         ^
bridge.cpp: In function 'int main()':
bridge.cpp:45:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&k,&n);
                         ^
bridge.cpp:47:46: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf(" %c %d %c %d",&c1,&x1,&c2,&x2);
                                              ^

• Subtask 1: 8 / 8
• Subtask 2: 14 / 14
• Subtask 3: 9 / 9
• Subtask 4: 32 / 32
• Subtask 5: 37 / 37