oj.uz

Submission #946517

# Submission time Handle Problem Language Result Execution time Memory
946517 2024-03-14T17:42:44 Z hariaakas646 Skyscraper (JOI16_skyscraper) C++17
100 / 100
 185 ms 242616 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
#define scd(t) scanf("%d", &t)
#define sclld(t) scanf("%lld", &t)
#define forr(i, l, r) for(int i=l; i<r; i++)
#define frange(i, l) forr(i, 0, l)
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define all(x) x.begin(), x.end()
 
typedef vector<int> vi;
typedef pair<int, int> pii;
typedef vector<pii> vii;
typedef long long lli;
typedef vector<vi> vvi;
typedef vector<lli> vll;
typedef vector<bool> vb;
typedef set<int> seti;
typedef multiset<int> mseti;
 
void usaco()
{
    freopen("/media/hariaakash646/785EF1075EF0BF46/CompetitiveProgramming/input.in", "r", stdin);
//    freopen("problem.out", "w", stdout);
}

const lli mod = 1e9 + 7;

int main() {
    // usaco();
    int n, l;
    scd(n);
    scd(l);
    vi vec(n);
    frange(i, n) scd(vec[i]);
    sort(all(vec));
    vec.pb(1e6);
    if(n == 1) {
        printf("1");
        return 0;
    }

    vector<vector<vll>> dp(n, vector<vll>(n+2, vll(3*(l+1))));
    if(2*(vec[1] - vec[0]) <= l)
        dp[0][1][2*(vec[1] - vec[0])] = 1;
    if((vec[1] - vec[0]) <= l)
        dp[0][1][(vec[1] - vec[0])+l+1] = 2;
    dp[0][1][2*(l+1)] = 1;

    forr(i, 1, n) {
        forr(j, 1, n+1) {
            forr(k, 0, l+1) {
                int c = k - (2*j) * (vec[i+1] - vec[i]);
                if(c >= 0) {
                    dp[i][j][k] += 2*j*dp[i-1][j][c] + dp[i-1][j-1][c] + dp[i-1][j+1][c] * j * (j+1);
                    dp[i][j][k] %= mod;
                }
                c = k - (2*(j)-1) * (vec[i+1] - vec[i]);
                if(c >= 0) {
                    dp[i][j][k+l+1] += (2*j-1)*dp[i-1][j][c+l+1] + dp[i-1][j-1][c+l+1] + dp[i-1][j+1][c+l+1] * (j * j);
                    dp[i][j][k+l+1] %= mod;
                    dp[i][j][k+l+1] += 2*j*dp[i-1][j][c] + 2*dp[i-1][j-1][c];
                    dp[i][j][k+l+1] %= mod;
                }
                c = k - (2*(j)-2) * (vec[i+1] - vec[i]);
                if(c >= 0) {
                    dp[i][j][k+2*(l+1)] += (2*j-2)*dp[i-1][j][c+2*(l+1)] + (j!=2) * dp[i-1][j-1][c+2*(l+1)] + dp[i-1][j+1][c+2*(l+1)] * ((j-1) * j + (j == 1));
                    dp[i][j][k+2*(l+1)] %= mod;
                    dp[i][j][k+2*(l+1)] += (j-1 + (j==1))*dp[i-1][j][c+l+1] + dp[i-1][j-1][c+l+1];
                    dp[i][j][k+2*(l+1)] %= mod;
                }
            }
        }
    }  
    lli tot = 0;
    frange(i, l+1) tot += dp[n-1][1][i+2*(l+1)];
    tot %= mod;
    printf("%lld", tot);
}

Compilation message

skyscraper.cpp: In function 'void usaco()':
skyscraper.cpp:27:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     freopen("/media/hariaakash646/785EF1075EF0BF46/CompetitiveProgramming/input.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
skyscraper.cpp:36:5: note: in expansion of macro 'scd'
   36 |     scd(n);
      |     ^~~
skyscraper.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
skyscraper.cpp:37:5: note: in expansion of macro 'scd'
   37 |     scd(l);
      |     ^~~
skyscraper.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
skyscraper.cpp:39:18: note: in expansion of macro 'scd'
   39 |     frange(i, n) scd(vec[i]);
      |                  ^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 436 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2140 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 2 ms 2140 KB Output is correct
10 Correct 0 ms 696 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 604 KB Output is correct
2 Correct 1 ms 940 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 856 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 860 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 436 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2140 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 2 ms 2140 KB Output is correct
10 Correct 0 ms 696 KB Output is correct
11 Correct 0 ms 604 KB Output is correct
12 Correct 1 ms 940 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 856 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 1 ms 860 KB Output is correct
17 Correct 0 ms 604 KB Output is correct
18 Correct 1 ms 600 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 1 ms 860 KB Output is correct
21 Correct 1 ms 1884 KB Output is correct
22 Correct 109 ms 122792 KB Output is correct
23 Correct 185 ms 238420 KB Output is correct
24 Correct 121 ms 180308 KB Output is correct
25 Correct 166 ms 241492 KB Output is correct
26 Correct 130 ms 205472 KB Output is correct
27 Correct 50 ms 59996 KB Output is correct
28 Correct 59 ms 73568 KB Output is correct
29 Correct 106 ms 139340 KB Output is correct
30 Correct 155 ms 242616 KB Output is correct