Submission #231149

#	Time	Username	Problem	Language	Result	Execution time	Memory
231149		duality	Hamburg Steak (JOI20_hamburg)	C++11	6 / 100	211 ms	17520 KiB

hamburg

#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 ----------

int L[200000],D[200000],R[200000],U[200000];
vi adjList[200000];
vi ans1,ans2;
int colour[200000];
int doDFS(int u,int c) {
    if (colour[u] != 0) return 0;
    int i;
    colour[u] = c+1;
    for (i = 0; i < adjList[u].size(); i++) doDFS(adjList[u][i],!c);
    return 0;
}
int main() {
    int i;
    int N,K;
    scanf("%d %d",&N,&K);
    for (i = 0; i < N; i++) scanf("%d %d %d %d",&L[i],&D[i],&R[i],&U[i]);

    if (K == 1) {
        int ml = 0,md = 0;
        for (i = 0; i < N; i++) ml = max(ml,L[i]),md = max(md,D[i]);
        printf("%d %d\n",ml,md);
    }
    else if (K == 2) {
        int b = 0;
        for (i = 0; i < N; i++) {
            if (L[i] > L[b]) b = i;
        }
        for (i = 0; i < N; i++) {
            if (R[i] < L[b]) {
                adjList[i].pb(b);
                adjList[b].pb(i);
            }
        }
        for (i = 0; i < N; i++) {
            if (R[i] < R[b]) b = i;
        }
        for (i = 0; i < N; i++) {
            if (L[i] > R[b]) {
                adjList[i].pb(b);
                adjList[b].pb(i);
            }
        }
        for (i = 0; i < N; i++) {
            if (D[i] > D[b]) b = i;
        }
        for (i = 0; i < N; i++) {
            if (U[i] < D[b]) {
                adjList[i].pb(b);
                adjList[b].pb(i);
            }
        }
        for (i = 0; i < N; i++) {
            if (U[i] < U[b]) b = i;
        }
        for (i = 0; i < N; i++) {
            if (D[i] > U[b]) {
                adjList[i].pb(b);
                adjList[b].pb(i);
            }
        }
        for (i = 0; i < N; i++) doDFS(i,0);
        for (i = 0; i < N; i++) {
            if (colour[i] == 1) ans1.pb(i);
            else ans2.pb(i);
        }
        int ml = 0,md = 0;
        for (i = 0; i < ans1.size(); i++) ml = max(ml,L[ans1[i]]),md = max(md,D[ans1[i]]);
        printf("%d %d\n",ml,md);
        ml = 0,md = 0;
        for (i = 0; i < ans2.size(); i++) ml = max(ml,L[ans2[i]]),md = max(md,D[ans2[i]]);
        printf("%d %d\n",ml,md);
    }

    return 0;
}

Compilation message (stderr)

hamburg.cpp: In function 'int doDFS(int, int)':
hamburg.cpp:66:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |     for (i = 0; i < adjList[u].size(); i++) doDFS(adjList[u][i],!c);
      |                 ~~^~~~~~~~~~~~~~~~~~~
hamburg.cpp: In function 'int main()':
hamburg.cpp:124:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  124 |         for (i = 0; i < ans1.size(); i++) ml = max(ml,L[ans1[i]]),md = max(md,D[ans1[i]]);
      |                     ~~^~~~~~~~~~~~~
hamburg.cpp:127:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  127 |         for (i = 0; i < ans2.size(); i++) ml = max(ml,L[ans2[i]]),md = max(md,D[ans2[i]]);
      |                     ~~^~~~~~~~~~~~~
hamburg.cpp:72:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   72 |     scanf("%d %d",&N,&K);
      |     ~~~~~^~~~~~~~~~~~~~~
hamburg.cpp:73:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   73 |     for (i = 0; i < N; i++) scanf("%d %d %d %d",&L[i],&D[i],&R[i],&U[i]);
      |                             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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• Subtask 2: 1 / 1
• Subtask 3: 0 / 3
• Subtask 4: 0 / 6
• Subtask 5: 1 / 1
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