Submission #27792

#	Time	Username	Problem	Language	Result	Execution time	Memory
27792		TAMREF	Palembang Bridges (APIO15_bridge)	C++11	22 / 100	173 ms	12180 KiB

bridge

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int mx=1e5+5;
ll Q[mx], R[mx], M[mx], C[mx<<1];
ll ans;
int K,N,U;
struct BIT{
    ll a[mx<<1];
    BIT(){
        for(int i=0;i<mx<<1;i++) a[i]=0;
    }
    ll s(int i){
        ll f=0;
        for(int j=i;j;j-=j&-j) f+=a[j];
        return f;
    }
    void u(int i,ll v){
        for(int j=i;j<mx<<1;j+=j&-j) a[j]+=v;
    }
};
void input(){
    scanf("%d %d",&K,&N);
    char s,t;
    for(int i=1;i<=N;i++){
        getchar();
        scanf("%c %d %c %d",&s,&Q[i],&t,&R[i]);
        if(s==t){
            ans+=llabs(Q[i]-R[i]);
            --i,--N;
        } else{
            ++ans;
            if(s=='B') swap(Q[i],R[i]);
            M[i]=Q[i]+R[i];
            C[2*i-1]=Q[i];
            C[2*i]=R[i];
        }
    }
    sort(C+1,C+2*N+1);
    U=unique(C+1,C+2*N+1)-C;
    for(int i=1;i<=N;i++)
        Q[i]=lower_bound(C+1,C+U,Q[i])-C,
        R[i]=lower_bound(C+1,C+U,R[i])-C;
}
struct solver1{
    BIT x,y,cx,cy;
    ll tx,ty;
    ll pro(int t){
        int cxs=cx.s(t),cys=cy.s(t);
        ll xs=x.s(t), ys=y.s(t);
        return   (C[t]*cxs-xs)+((tx-xs)-C[t]*(N-cxs))
                +(C[t]*cys-ys)+((ty-ys)-C[t]*(N-cys));
    }
    void solve(){
        for(int i=1;i<=N;i++){
            x.u(Q[i],C[Q[i]]);
            y.u(R[i],C[R[i]]);
            cx.u(Q[i],1);
            cy.u(R[i],1);
        }
        tx=x.s(U-1), ty=y.s(U-1);
        int p=1,q,r,s=U-1;
        while(p<s){
            q=p+(s-p)/3, r=s-(s-p)/3;
            if(pro(q)<=pro(r)) s=r-1;
            else p=q+1;
        }
        printf("%lld\n",ans+pro(p));
    }
} S1;
int main(){
    input();
    if(K==1) S1.solve();
    else return 0;
}

Compilation message (stderr)

bridge.cpp: In function 'void input()':
bridge.cpp:27:46: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'll* {aka long long int*}' [-Wformat=]
         scanf("%c %d %c %d",&s,&Q[i],&t,&R[i]);
                                              ^
bridge.cpp:27:46: warning: format '%d' expects argument of type 'int*', but argument 5 has type 'll* {aka long long int*}' [-Wformat=]
bridge.cpp:23:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&K,&N);
                         ^
bridge.cpp:27:47: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%c %d %c %d",&s,&Q[i],&t,&R[i]);
                                               ^

• Subtask 1: 8 / 8
• Subtask 2: 14 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37