oj.uz

답안 #79428

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
79428 2018-10-13T18:08:35 Z duality Mousetrap (CEOI17_mousetrap) C++11
25 / 100
 1110 ms 91756 KB 
#define DEBUG 1

#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 t,m;
vi adjList[1000000];
int parent[1000000],dp[1000000];
int doDFS(int u,int p) {
    int i;
    int m1 = 0,m2 = 0,c = 0;
    parent[u] = p;
    for (i = 0; i < adjList[u].size(); i++) {
        int v = adjList[u][i];
        if (v != p) {
            doDFS(v,u);
            if (dp[v] >= m1) m2 = m1,m1 = dp[v];
            else if (dp[v] >= m2) m2 = dp[v];
            c++;
        }
    }
    dp[u] = m2+c;
    return dp[u];
}
vi x[1000000];
int sum[1000000];
int dp2[1010][1010];
int main() {
    int i;
    int n;
    int a,b;
    scanf("%d %d %d",&n,&t,&m),t--,m--;
    for (i = 1; i < n; i++) {
        scanf("%d %d",&a,&b);
        a--,b--;
        adjList[a].pb(b);
        adjList[b].pb(a);
    }
    doDFS(t,-1);

    int j,k;
    int u = m,p = -1,c = 0;
    while (u != -1) {
        for (i = 0; i < adjList[u].size(); i++) {
            int v = adjList[u][i];
            if ((v != parent[u]) && (v != p)) x[c].pb(dp[v]);
        }
        sort(x[c].begin(),x[c].end(),greater<int>());
        sum[c] += adjList[u].size()-2;
        p = u,u = parent[u],c++;
    }
    reverse(x,x+c),reverse(sum,sum+c);
    for (i = 1; i < c; i++) {
        if (i > 1) sum[i] += sum[i-1];
        for (j = 0; j <= n; j++) {
            dp2[i][j] = MAX_VAL;
            for (k = 0; k <= x[i].size(); k++) {
                if (k > j+1) break;
                dp2[i][j] = min(dp2[i][j],max((k == x[i].size()) ? 0:(x[i][k]+sum[i]+1),dp2[i-1][j+1-k]+k));
            }
        }
    }
    printf("%d\n",dp2[c-1][0]);

    return 0;
}

Compilation message

mousetrap.cpp: In function 'int doDFS(int, int)':
mousetrap.cpp:65:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < adjList[u].size(); i++) {
                 ~~^~~~~~~~~~~~~~~~~~~
mousetrap.cpp: In function 'int main()':
mousetrap.cpp:96:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (i = 0; i < adjList[u].size(); i++) {
                     ~~^~~~~~~~~~~~~~~~~~~
mousetrap.cpp:109:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (k = 0; k <= x[i].size(); k++) {
                         ~~^~~~~~~~~~~~~~
mousetrap.cpp:111:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 dp2[i][j] = min(dp2[i][j],max((k == x[i].size()) ? 0:(x[i][k]+sum[i]+1),dp2[i-1][j+1-k]+k));
                                                ~~^~~~~~~~~~~~~~
mousetrap.cpp:84:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d",&n,&t,&m),t--,m--;
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
mousetrap.cpp:86:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d",&a,&b);
         ~~~~~^~~~~~~~~~~~~~~

Subtask #1
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 44 ms 47352 KB Output is correct
2 Correct 45 ms 47356 KB Output is correct
3 Correct 44 ms 47392 KB Output is correct
4 Correct 44 ms 47392 KB Output is correct
5 Correct 44 ms 47392 KB Output is correct
6 Correct 44 ms 47392 KB Output is correct
7 Correct 44 ms 47424 KB Output is correct
8 Incorrect 45 ms 47440 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #2
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 483 ms 90404 KB Output is correct
2 Correct 457 ms 90404 KB Output is correct
3 Correct 1097 ms 91752 KB Output is correct
4 Correct 483 ms 91752 KB Output is correct
5 Correct 1110 ms 91752 KB Output is correct
6 Correct 1098 ms 91756 KB Output is correct

Subtask #3
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 44 ms 47352 KB Output is correct
2 Correct 45 ms 47356 KB Output is correct
3 Correct 44 ms 47392 KB Output is correct
4 Correct 44 ms 47392 KB Output is correct
5 Correct 44 ms 47392 KB Output is correct
6 Correct 44 ms 47392 KB Output is correct
7 Correct 44 ms 47424 KB Output is correct
8 Incorrect 45 ms 47440 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 44 ms 47352 KB Output is correct
2 Correct 45 ms 47356 KB Output is correct
3 Correct 44 ms 47392 KB Output is correct
4 Correct 44 ms 47392 KB Output is correct
5 Correct 44 ms 47392 KB Output is correct
6 Correct 44 ms 47392 KB Output is correct
7 Correct 44 ms 47424 KB Output is correct
8 Incorrect 45 ms 47440 KB Output isn't correct
9 Halted 0 ms 0 KB -