Submission #238783

#	Time	Username	Problem	Language	Result	Execution time	Memory
238783		duality	Split the Attractions (IOI19_split)	C++14	46 / 100	168 ms	43640 KiB

split

#define DEBUG 0

#include <bits/stdc++.h>
using namespace std;

#if DEBUG
// basic debugging macros
int __i__,__j__;
#define printLine(l) for(__i__=0;__i__<l;__i__++){cout<<"-";}cout<<endl
#define printLine2(l,c) for(__i__=0;__i__<l;__i__++){cout<<c;}cout<<endl
#define printVar(n) cout<<#n<<": "<<n<<endl
#define printArr(a,l) cout<<#a<<": ";for(__i__=0;__i__<l;__i__++){cout<<a[__i__]<<" ";}cout<<endl
#define print2dArr(a,r,c) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<a[__i__][__j__]<<" ";}cout<<endl;}
#define print2dArr2(a,r,c,l) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<setw(l)<<setfill(' ')<<a[__i__][__j__]<<" ";}cout<<endl;}

// advanced debugging class
// debug 1,2,'A',"test";
class _Debug {
    public:
        template<typename T>
        _Debug& operator,(T val) {
            cout << val << endl;
            return *this;
        }
};
#define debug _Debug(),
#else
#define printLine(l)
#define printLine2(l,c)
#define printVar(n)
#define printArr(a,l)
#define print2dArr(a,r,c)
#define print2dArr2(a,r,c,l)
#define debug
#endif

// define
#define MAX_VAL 999999999
#define MAX_VAL_2 999999999999999999LL
#define EPS 1e-6
#define mp make_pair
#define pb push_back

// typedef
typedef unsigned int UI;
typedef long long int LLI;
typedef unsigned long long int ULLI;
typedef unsigned short int US;
typedef pair<int,int> pii;
typedef pair<LLI,LLI> plli;
typedef vector<int> vi;
typedef vector<LLI> vlli;
typedef vector<pii> vpii;
typedef vector<plli> vplli;

// ---------- END OF TEMPLATE ----------

vi adjList[100000],adjList2[100000];
int parent[100000],size[100000],disc[100000],low[100000],fin[100000],num = 0;
int doDFS(int u,int p) {
    int i;
    parent[u] = p,size[u] = 1,disc[u] = low[u] = num++;
    for (i = 0; i < adjList[u].size(); i++) {
        int v = adjList[u][i];
        if (disc[v] == -1) {
            adjList2[u].pb(v),size[u] += doDFS(v,u);
            low[u] = min(low[u],low[v]);
        }
        else if (v != p) low[u] = min(low[u],disc[v]);
    }
    fin[u] = num;
    return size[u];
}
pii x[3];
vi ans;
int need,no;
int doDFS2(int u) {
    if (need == 0) return 0;
    int i;
    ans[u] = x[0].second,need--;
    for (i = 0; i < adjList2[u].size(); i++) doDFS2(adjList2[u][i]);
    return 0;
}
int doDFS3(int u) {
    if (need == 0) return 0;
    int i;
    ans[u] = x[1].second,need--;
    for (i = 0; i < adjList[u].size(); i++) {
        if (ans[adjList[u][i]] == x[2].second) doDFS3(adjList[u][i]);
    }
    return 0;
}
int doDFS4(int u) {
    if (need == 0) return 0;
    int i;
    if ((disc[u] >= disc[no]) && (disc[u] < fin[no])) return 0;
    ans[u] = x[0].second,need--;
    for (i = 0; i < adjList[u].size(); i++) {
        int v = adjList[u][i];
        if (ans[v] == x[2].second) doDFS4(v);
    }
    return 0;
}
vector<int> find_split(int n,int a,int b,int c,vector<int> p,vector<int> q) {
    int i;
    x[0] = mp(a,1),x[1] = mp(b,2),x[2] = mp(c,3),sort(x,x+3);
    for (i = 0; i < p.size(); i++) {
        adjList[p[i]].pb(q[i]);
        adjList[q[i]].pb(p[i]);
    }
    for (i = 0; i < n; i++) disc[i] = low[i] = -1;
    doDFS(0,-1);
    int u = 0;
    while (1) {
        int h = -1;
        for (i = 0; i < adjList2[u].size(); i++) {
            int v = adjList2[u][i];
            if ((h == -1) || (size[v] > size[h])) h = v;
        }
        if (size[h] >= x[0].first) u = h;
        else break;
    }
    ans.resize(n,x[2].second);
    if (n-size[u] >= x[1].first) {
        need = x[0].first,doDFS2(u);
        need = x[1].first,doDFS3(parent[u]);
    }
    else {
        no = u,need = x[0].first,doDFS4(0);
        for (i = 0; i < adjList2[u].size(); i++) {
            int v = adjList2[u][i];
            if (low[v] < disc[u]) doDFS2(v);
        }
        if (need > 0) fill(ans.begin(),ans.end(),0);
        else need = x[1].first,doDFS3(u);
    }
    return ans;
}

Compilation message (stderr)

split.cpp: In function 'int doDFS(int, int)':
split.cpp:63:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < adjList[u].size(); i++) {
                 ~~^~~~~~~~~~~~~~~~~~~
split.cpp: In function 'int doDFS2(int)':
split.cpp:81:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < adjList2[u].size(); i++) doDFS2(adjList2[u][i]);
                 ~~^~~~~~~~~~~~~~~~~~~~
split.cpp: In function 'int doDFS3(int)':
split.cpp:88:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < adjList[u].size(); i++) {
                 ~~^~~~~~~~~~~~~~~~~~~
split.cpp: In function 'int doDFS4(int)':
split.cpp:98:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < adjList[u].size(); i++) {
                 ~~^~~~~~~~~~~~~~~~~~~
split.cpp: In function 'std::vector<int> find_split(int, int, int, int, std::vector<int>, std::vector<int>)':
split.cpp:107:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < p.size(); i++) {
                 ~~^~~~~~~~~~
split.cpp:116:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (i = 0; i < adjList2[u].size(); i++) {
                     ~~^~~~~~~~~~~~~~~~~~~~
split.cpp:130:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (i = 0; i < adjList2[u].size(); i++) {
                     ~~^~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 22 / 22
• Subtask 4: 24 / 24
• Subtask 5: 0 / 36