Submission #398755

#	Time	Username	Problem	Language	Result	Execution time	Memory
398755		duality	Rope (JOI17_rope)	C++11	80 / 100	2554 ms	81696 KiB

rope

#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 C[1000000];
int ans[1000000],occ[1000000];
vi adj[1000000];
int tree[1 << 21];
int build(int s,int e,int i) {
    if (s == e) {
        tree[i] = occ[s];
        return 0;
    }

    int mid = (s+e) / 2;
    build(s,mid,2*i+1),build(mid+1,e,2*i+2);
    tree[i] = max(tree[2*i+1],tree[2*i+2]);
    return 0;
}
int update(int s,int e,int ai,int i,int num) {
    if ((s > ai) || (e < ai)) return 0;
    else if (s == e) {
        tree[i] += num;
        return 0;
    }

    int mid = (s+e) / 2;
    update(s,mid,ai,2*i+1,num),update(mid+1,e,ai,2*i+2,num);
    tree[i] = max(tree[2*i+1],tree[2*i+2]);
    return 0;
}
int main() {
    int i;
    int N,M;
    scanf("%d %d",&N,&M);
    for (i = 0; i < N; i++) scanf("%d",&C[i]),C[i]--;
    if (M == 1) {
        printf("0\n");
        return 0;
    }

    int j,t;
    for (i = 0; i < M; i++) ans[i] = N;
    for (i = 0; i < N; i++) occ[C[i]]++;
    build(0,M-1,0);
    for (t = 0; t < 2; t++) {
        for (i = t; i+1 < N; i += 2) {
            adj[C[i]].pb(C[i+1]);
            adj[C[i+1]].pb(C[i]);
        }
        for (i = 0; i < M; i++) {
            for (j = 0; j < adj[i].size(); j++) update(0,M-1,adj[i][j],0,-1);
            update(0,M-1,i,0,-1e9);
            ans[i] = min(ans[i],N-occ[i]-tree[0]);
            for (j = 0; j < adj[i].size(); j++) update(0,M-1,adj[i][j],0,1);
            update(0,M-1,i,0,1e9);
            adj[i].clear();
        }
    }
    for (i = 0; i < M; i++) printf("%d\n",ans[i]);

    return 0;
}

Compilation message (stderr)

rope.cpp: In function 'int main()':
rope.cpp:105:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  105 |             for (j = 0; j < adj[i].size(); j++) update(0,M-1,adj[i][j],0,-1);
      |                         ~~^~~~~~~~~~~~~~~
rope.cpp:108:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  108 |             for (j = 0; j < adj[i].size(); j++) update(0,M-1,adj[i][j],0,1);
      |                         ~~^~~~~~~~~~~~~~~
rope.cpp:88:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   88 |     scanf("%d %d",&N,&M);
      |     ~~~~~^~~~~~~~~~~~~~~
rope.cpp:89:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   89 |     for (i = 0; i < N; i++) scanf("%d",&C[i]),C[i]--;
      |                             ~~~~~^~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 30 / 30
• Subtask 3: 10 / 10
• Subtask 4: 25 / 25
• Subtask 5: 0 / 20