oj.uz

Submission #68116

# Submission time Handle Problem Language Result Execution time Memory
68116 2018-08-16T01:03:29 Z duality Skyscraper (JOI16_skyscraper) C++11
100 / 100
 331 ms 117800 KB 
#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 ----------
#define MOD 1000000007

int A[100];
LLI dp[100][101][1001][3];
int main() {
    int i;
    int N,L;
    scanf("%d %d",&N,&L);
    for (i = 0; i < N; i++) scanf("%d",&A[i]);
    sort(A,A+N);
    if (N == 1) {
        printf("1\n");
        return 0;
    }

    int j,k,l;
    if (A[1]-A[0] <= L) dp[0][1][A[1]-A[0]][1] = 2;
    if (2*(A[1]-A[0]) <= L) dp[0][1][2*(A[1]-A[0])][0] = 1;
    for (i = 0; i < N-1; i++) {
        for (j = 1; j <= i+1; j++) {
            for (k = 0; k <= L; k++) {
                int d = (i == N-2) ? 9999:(A[i+2]-A[i+1]);
                for (l = 0; l <= 2; l++) {
                    dp[i][j][k][l] %= MOD;
                    if (l < 2) {
                        if ((k+(2*j+1-l)*d) <= L) dp[i+1][j+1][k+(2*j+1-l)*d][l+1] += (2-l)*dp[i][j][k][l];
                        if ((k+(2*j-1-l)*d) <= L) {
                            if (i == N-2) dp[i+1][j][k+(2*j-1-l)*d][l+1] += (2-l)*j*dp[i][j][k][l];
                            else dp[i+1][j][k+(2*j-1-l)*d][l+1] += (2-l)*(j-l)*dp[i][j][k][l];
                        }
                    }
                    if ((k+(2*j+2-l)*d) <= L) dp[i+1][j+1][k+(2*j+2-l)*d][l] += dp[i][j][k][l];
                    if ((k+(2*j-l)*d) <= L) dp[i+1][j][k+(2*j-l)*d][l] += (2*j-l)*dp[i][j][k][l];
                    if ((j >= 2) && ((k+(2*j-2-l)*d) <= L)) {
                        if (l == 0) dp[i+1][j-1][k+(2*j-2-l)*d][l] += j*(j-1)*dp[i][j][k][l];
                        else if (l == 1) dp[i+1][j-1][k+(2*j-2-l)*d][l] += (j-1)*(j-1)*dp[i][j][k][l];
                        else {
                            if (i == N-2) dp[i+1][j-1][k+(2*j-2-l)*d][l] += ((j-1)*(j-2)+1)*dp[i][j][k][l];
                            else dp[i+1][j-1][k+(2*j-2-l)*d][l] += (j-1)*(j-2)*dp[i][j][k][l];
                        }
                    }
                }
            }
        }
    }
    LLI ans = 0;
    for (i = 0; i <= L; i++) ans += dp[N-1][1][i][2];
    printf("%lld\n",ans % MOD);

    return 0;
}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:64:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&N,&L);
     ~~~~~^~~~~~~~~~~~~~~
skyscraper.cpp:65:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for (i = 0; i < N; i++) scanf("%d",&A[i]);
                             ~~~~~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 472 KB Output is correct
3 Correct 3 ms 472 KB Output is correct
4 Correct 3 ms 540 KB Output is correct
5 Correct 5 ms 1180 KB Output is correct
6 Correct 4 ms 1180 KB Output is correct
7 Correct 3 ms 1180 KB Output is correct
8 Correct 3 ms 1180 KB Output is correct
9 Correct 5 ms 1228 KB Output is correct
10 Correct 3 ms 1228 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1228 KB Output is correct
2 Correct 4 ms 1228 KB Output is correct
3 Correct 3 ms 1228 KB Output is correct
4 Correct 4 ms 1228 KB Output is correct
5 Correct 4 ms 1228 KB Output is correct
6 Correct 4 ms 1232 KB Output is correct
7 Correct 3 ms 1232 KB Output is correct
8 Correct 4 ms 1232 KB Output is correct
9 Correct 3 ms 1232 KB Output is correct
10 Correct 4 ms 1232 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 472 KB Output is correct
3 Correct 3 ms 472 KB Output is correct
4 Correct 3 ms 540 KB Output is correct
5 Correct 5 ms 1180 KB Output is correct
6 Correct 4 ms 1180 KB Output is correct
7 Correct 3 ms 1180 KB Output is correct
8 Correct 3 ms 1180 KB Output is correct
9 Correct 5 ms 1228 KB Output is correct
10 Correct 3 ms 1228 KB Output is correct
11 Correct 4 ms 1228 KB Output is correct
12 Correct 4 ms 1228 KB Output is correct
13 Correct 3 ms 1228 KB Output is correct
14 Correct 4 ms 1228 KB Output is correct
15 Correct 4 ms 1228 KB Output is correct
16 Correct 4 ms 1232 KB Output is correct
17 Correct 3 ms 1232 KB Output is correct
18 Correct 4 ms 1232 KB Output is correct
19 Correct 3 ms 1232 KB Output is correct
20 Correct 4 ms 1232 KB Output is correct
21 Correct 8 ms 4604 KB Output is correct
22 Correct 210 ms 70952 KB Output is correct
23 Correct 331 ms 117620 KB Output is correct
24 Correct 292 ms 117620 KB Output is correct
25 Correct 293 ms 117696 KB Output is correct
26 Correct 256 ms 117696 KB Output is correct
27 Correct 90 ms 117696 KB Output is correct
28 Correct 115 ms 117696 KB Output is correct
29 Correct 198 ms 117696 KB Output is correct
30 Correct 292 ms 117800 KB Output is correct