Submission #954545

#	Time	Username	Problem	Language	Result	Execution time	Memory
954545		hihihihaw	Palembang Bridges (APIO15_bridge)	C++17	22 / 100	33 ms	4332 KiB

bridge

#pragma GCC optimize("O3,unroll-loops")    
#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define pb push_back
#define pii pair<int,int>
#define sz(v) (int)v.size()
#define fi first
#define se second
#define INF 1223372036854775807
#define MOD 1000000007
#define cint(x) int x;cin>>x;
#define cinarr(a,n) int a[n];for (int i=0;i<n;i++) cin>>a[i];
#define coutarr(a) for (auto d:a) cout<<d<<" "; cout<<endl;
#define coutarrD(a) for (auto d:a) cout<<d.fi<<","<<d.se<<" "; cout<<endl;
#define AYBERK_SARICA ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define endl '\n'
#define ld long double

int t=1;
int usaco=0;
vector<pii> v;
int f(int x){
    int ans=0;
    for (auto d:v)ans+=abs(x-d.fi)+abs(x-d.se)+1;
    return ans;
}

void solve(){
    int k,n;
    cin>>k>>n;
    int ans=0;
    while (n--){
        char a,b;
        int x,y;
        cin>>a>>x>>b>>y;
        if (a==b) ans+=abs(x-y);
        else{
            v.pb({x,y});
        }
    }
    int l=0,r=9999999999;
    
    while (r>=l){
        int m=(l+r)/2;
        if (f(m)<=f(m+1)) r=m-1;
        else l=m+1;
    }
    cout<<f(l)+ans<<endl;
    
}  
    

    

 
 
 
 
int32_t main(){
    
    AYBERK_SARICA;
    if (usaco){
        freopen("hayfeast.in", "r", stdin);
        freopen("hayfeast.out", "w", stdout);
    }
    #ifdef Local
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
        //freopen("wormsort.out", "w", stdout);
    #endif
    if (t==1) solve();
    else{
        cin>>t;
        while (t--) solve();
    }
    
        
    return 0;
}

Compilation message (stderr)

bridge.cpp: In function 'int32_t main()':
bridge.cpp:65:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |         freopen("hayfeast.in", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
bridge.cpp:66:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |         freopen("hayfeast.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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