Submission #225018

#	Time	Username	Problem	Language	Result	Execution time	Memory
225018		mehrdad_sohrabi	ČVENK (COI15_cvenk)	C++14	60 / 100	3113 ms	275388 KiB

cvenk

#include <bits/stdc++.h>
typedef long long int ll;
typedef long double ld;
#define pb push_back
#define pii pair < ll , ll >
#define F first
#define S second
#define endl '\n'
#define int long long
#define sync ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
#define kill(x) return cout<<x<<'\n', 0;
using namespace std;
const int N=3e5+100,M=60;
vector <int> g[N];
map <pii,int> mp;
ll w[N*32];
pii nod[N*32];
ll par[N*32];
ll sz[N*32];
ll dp[N*32];
ll n;
ll ma=(ll)1e15;
ll dfssz(ll v){
    sz[v]=w[v];
    for (auto u : g[v]){
        dfssz(u);
        sz[v]+=sz[u];
    }
}
ll dfsdp(ll v){
    for (auto u : g[v]){
        dfsdp(u);
        dp[v]+=dp[u];
        ll e=nod[u].F-nod[v].F+nod[u].S-nod[v].S;
        dp[v]+=sz[u]*e;
    }
}
ll dfs(ll v){
    ma=min(ma,dp[v]);
    for (auto u : g[v]){
        ll e=nod[u].F-nod[v].F+nod[u].S-nod[v].S;
        dp[u]=dp[v]+e*n-2*e*sz[u];
        dfs(u);
    }
}
int32_t main(){
    sync;
    scanf("%lld",&n);
   // cin >> n;
    vector <pii> a;
    ll cnt=2;
    mp[{0,0}]=1;
    nod[1]={0,0};
    ll ans=0;
    for (int i=0;i<n;i++){
        ll r,s;
        scanf("%lld %lld",&r,&s);
        //cin >> r >> s;
        ans+=r+s;
        ll f=r,h=s;
        ll x=0,y=0;
        for (int j=M/2;j>-1;j--){
            ll z=x,t=y;
            if ((r-x)>=(1<<j)){
                x+=(1<<j);
            }
            if (mp[{x,y}]==0){
                nod[cnt]={x,y};
                par[cnt]=mp[{z,t}];
                mp[{x,y}]=cnt++;
            }
            a.pb({x,y});
            if ((s-y)>=(1<<j)){
                y+=(1<<j);
            }
            a.pb({x,y});
            if (mp[{x,y}]==0){
                nod[cnt]={x,y};
                //  cout << x << " " << y << endl;
                par[cnt]=mp[{z,t}];
                mp[{x,y}]=cnt++;
            }
        }
        w[mp[{r,s}]]++;
    }
    a.pb({0,0});
    sort(a.begin(),a.end());
    a.resize(unique(a.begin(), a.end()) - a.begin());
    for (int i=1;i<a.size();i++){
        if (a[i].F==a[i-1].F && nod[par[mp[a[i]]]].S<=nod[mp[a[i-1]]].S && nod[par[mp[a[i]]]].F==nod[mp[a[i-1]]].F){
            par[mp[a[i]]]=mp[a[i-1]];
        }
    }
    vector <pii> b;
    for (int i=0;i<a.size();i++){
        swap(a[i].F,a[i].S);
        b.pb(a[i]);
        swap(a[i].F,a[i].S);
    }
    sort(b.begin(),b.end());
    for (int i=1;i<b.size();i++){
        pii d=b[i],e=b[i-1];
        swap(d.F,d.S);
        swap(e.F,e.S);
        if (b[i].F==b[i-1].F && nod[par[mp[d]]].F<=nod[mp[e]].F && nod[par[mp[d]]].S==nod[mp[e]].S){
            par[mp[d]]=mp[e];
           // cout << nod[par[mp[{2,1}]]].F << " argers " << nod[par[mp[{2,1}]]].S << endl;
        }
    }
    for (int i=1;i<a.size();i++){
        g[par[mp[a[i]]]].pb(mp[a[i]]);
    //    cout << par[mp[a[i]]] << " " << mp[a[i]] << " " << nod[mp[a[i]]].F << " " << nod[mp[a[i]]].S << " " <<  nod[par[mp[a[i]]]].F << " " << nod[par[mp[a[i]]]].S << endl;
    }
    dfssz(mp[{0,0}]);
    dfsdp(mp[{0,0}]);
    dfs(mp[{0,0}]);
    printf("%lld",ma);
   // cout << ans-(1<<28);


}
/*
9
28 0
25 4
20 9
20 0
18 13
16 12
16 5
4 9
10 16
*/

Compilation message (stderr)

cvenk.cpp: In function 'll dfssz(ll)':
cvenk.cpp:30:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
cvenk.cpp: In function 'll dfsdp(ll)':
cvenk.cpp:38:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
cvenk.cpp: In function 'll dfs(ll)':
cvenk.cpp:46:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
cvenk.cpp: In function 'int32_t main()':
cvenk.cpp:61:12: warning: unused variable 'f' [-Wunused-variable]
         ll f=r,h=s;
            ^
cvenk.cpp:61:16: warning: unused variable 'h' [-Wunused-variable]
         ll f=r,h=s;
                ^
cvenk.cpp:90:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=1;i<a.size();i++){
                  ~^~~~~~~~~
cvenk.cpp:96:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0;i<a.size();i++){
                  ~^~~~~~~~~
cvenk.cpp:102:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=1;i<b.size();i++){
                  ~^~~~~~~~~
cvenk.cpp:111:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=1;i<a.size();i++){
                  ~^~~~~~~~~
cvenk.cpp:49:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld",&n);
     ~~~~~^~~~~~~~~~~
cvenk.cpp:58:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld %lld",&r,&s);
         ~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 21 / 21
• Subtask 3: 22 / 22
• Subtask 4: 0 / 40