oj.uz

Submission #50352

# Submission time Handle Problem Language Result Execution time Memory
50352 2018-06-10T17:37:47 Z duality Boat (APIO16_boat) C++11
100 / 100
 877 ms 5256 KB 
#include <bits/stdc++.h>
using namespace std;

// 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(),

// define
#define MAX_VAL 999999999
#define MAX_VAL_2 999999999999999999LL
#define EPS 1e-6

// 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[500],b[500];
vi l;
LLI inv[501];
LLI dp[500][1000];
int main() {
    int i;
    int N;
    scanf("%d",&N);
    for (i = 0; i < N; i++) scanf("%d %d",&a[i],&b[i]),b[i]++,l.push_back(a[i]),l.push_back(b[i]);
    l.push_back(-1);
    sort(l.begin(),l.end());
    l.resize(unique(l.begin(),l.end())-l.begin());

    int j,k;
    int s = 0,x;
    LLI w;
    for (i = 1; i <= N; i++) {
        int e = MOD-2;
        LLI r = 1,b = i;
        while (e > 0) {
            if (e & 1) r *= b,r %= MOD;
            e >>= 1;
            b *= b,b %= MOD;
        }
        inv[i] = r;
    }
    for (i = 0; i < N; i++) {
        for (j = 1; j < (l.size()-1); j++) {
            w = 1,x = 0;
            dp[i][j] = dp[i][j-1];
            for (k = i; k >= 0; k--) {
                if ((l[j] >= a[k]) && (l[j+1] <= b[k])) {
                    w *= l[j+1]-l[j]+x,w %= MOD;
                    w *= inv[x+1],w %= MOD;
                    x++;
                }
                else if (k == i) break;
                if (k == 0) dp[i][j] += w;
                else dp[i][j] += w*dp[k-1][j-1];
                dp[i][j] %= MOD;
            }
        }
        s += dp[i][l.size()-2],s %= MOD;
    }
    printf("%d\n",s);

    return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:72:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (j = 1; j < (l.size()-1); j++) {
                     ~~^~~~~~~~~~~~~~
boat.cpp:52:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&N);
     ~~~~~^~~~~~~~~
boat.cpp:53:80: 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 %d",&a[i],&b[i]),b[i]++,l.push_back(a[i]),l.push_back(b[i]);
                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4216 KB Output is correct
2 Correct 7 ms 4360 KB Output is correct
3 Correct 7 ms 4384 KB Output is correct
4 Correct 7 ms 4416 KB Output is correct
5 Correct 6 ms 4416 KB Output is correct
6 Correct 7 ms 4416 KB Output is correct
7 Correct 7 ms 4416 KB Output is correct
8 Correct 7 ms 4416 KB Output is correct
9 Correct 9 ms 4416 KB Output is correct
10 Correct 7 ms 4416 KB Output is correct
11 Correct 7 ms 4416 KB Output is correct
12 Correct 7 ms 4416 KB Output is correct
13 Correct 6 ms 4432 KB Output is correct
14 Correct 8 ms 4476 KB Output is correct
15 Correct 7 ms 4476 KB Output is correct
16 Correct 6 ms 4476 KB Output is correct
17 Correct 7 ms 4476 KB Output is correct
18 Correct 6 ms 4476 KB Output is correct
19 Correct 6 ms 4476 KB Output is correct
20 Correct 7 ms 4476 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4216 KB Output is correct
2 Correct 7 ms 4360 KB Output is correct
3 Correct 7 ms 4384 KB Output is correct
4 Correct 7 ms 4416 KB Output is correct
5 Correct 6 ms 4416 KB Output is correct
6 Correct 7 ms 4416 KB Output is correct
7 Correct 7 ms 4416 KB Output is correct
8 Correct 7 ms 4416 KB Output is correct
9 Correct 9 ms 4416 KB Output is correct
10 Correct 7 ms 4416 KB Output is correct
11 Correct 7 ms 4416 KB Output is correct
12 Correct 7 ms 4416 KB Output is correct
13 Correct 6 ms 4432 KB Output is correct
14 Correct 8 ms 4476 KB Output is correct
15 Correct 7 ms 4476 KB Output is correct
16 Correct 6 ms 4476 KB Output is correct
17 Correct 7 ms 4476 KB Output is correct
18 Correct 6 ms 4476 KB Output is correct
19 Correct 6 ms 4476 KB Output is correct
20 Correct 7 ms 4476 KB Output is correct
21 Correct 362 ms 4476 KB Output is correct
22 Correct 362 ms 4604 KB Output is correct
23 Correct 302 ms 4604 KB Output is correct
24 Correct 391 ms 4668 KB Output is correct
25 Correct 322 ms 4668 KB Output is correct
26 Correct 651 ms 4744 KB Output is correct
27 Correct 653 ms 4776 KB Output is correct
28 Correct 662 ms 4852 KB Output is correct
29 Correct 684 ms 4852 KB Output is correct
30 Correct 9 ms 4852 KB Output is correct
31 Correct 10 ms 4852 KB Output is correct
32 Correct 9 ms 4852 KB Output is correct
33 Correct 9 ms 4852 KB Output is correct
34 Correct 9 ms 4852 KB Output is correct
35 Correct 11 ms 4852 KB Output is correct
36 Correct 11 ms 4852 KB Output is correct
37 Correct 10 ms 4852 KB Output is correct
38 Correct 11 ms 4852 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4852 KB Output is correct
2 Correct 5 ms 4852 KB Output is correct
3 Correct 5 ms 4852 KB Output is correct
4 Correct 5 ms 4852 KB Output is correct
5 Correct 6 ms 4852 KB Output is correct
6 Correct 9 ms 4852 KB Output is correct
7 Correct 8 ms 4852 KB Output is correct
8 Correct 8 ms 4852 KB Output is correct
9 Correct 9 ms 4852 KB Output is correct
10 Correct 8 ms 4852 KB Output is correct
11 Correct 5 ms 4852 KB Output is correct
12 Correct 5 ms 4852 KB Output is correct
13 Correct 5 ms 4852 KB Output is correct
14 Correct 5 ms 4852 KB Output is correct
15 Correct 5 ms 4852 KB Output is correct
16 Correct 5 ms 4852 KB Output is correct
17 Correct 4 ms 4852 KB Output is correct
18 Correct 4 ms 4852 KB Output is correct
19 Correct 4 ms 4852 KB Output is correct
20 Correct 4 ms 4852 KB Output is correct

Subtask #4
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4216 KB Output is correct
2 Correct 7 ms 4360 KB Output is correct
3 Correct 7 ms 4384 KB Output is correct
4 Correct 7 ms 4416 KB Output is correct
5 Correct 6 ms 4416 KB Output is correct
6 Correct 7 ms 4416 KB Output is correct
7 Correct 7 ms 4416 KB Output is correct
8 Correct 7 ms 4416 KB Output is correct
9 Correct 9 ms 4416 KB Output is correct
10 Correct 7 ms 4416 KB Output is correct
11 Correct 7 ms 4416 KB Output is correct
12 Correct 7 ms 4416 KB Output is correct
13 Correct 6 ms 4432 KB Output is correct
14 Correct 8 ms 4476 KB Output is correct
15 Correct 7 ms 4476 KB Output is correct
16 Correct 6 ms 4476 KB Output is correct
17 Correct 7 ms 4476 KB Output is correct
18 Correct 6 ms 4476 KB Output is correct
19 Correct 6 ms 4476 KB Output is correct
20 Correct 7 ms 4476 KB Output is correct
21 Correct 362 ms 4476 KB Output is correct
22 Correct 362 ms 4604 KB Output is correct
23 Correct 302 ms 4604 KB Output is correct
24 Correct 391 ms 4668 KB Output is correct
25 Correct 322 ms 4668 KB Output is correct
26 Correct 651 ms 4744 KB Output is correct
27 Correct 653 ms 4776 KB Output is correct
28 Correct 662 ms 4852 KB Output is correct
29 Correct 684 ms 4852 KB Output is correct
30 Correct 9 ms 4852 KB Output is correct
31 Correct 10 ms 4852 KB Output is correct
32 Correct 9 ms 4852 KB Output is correct
33 Correct 9 ms 4852 KB Output is correct
34 Correct 9 ms 4852 KB Output is correct
35 Correct 11 ms 4852 KB Output is correct
36 Correct 11 ms 4852 KB Output is correct
37 Correct 10 ms 4852 KB Output is correct
38 Correct 11 ms 4852 KB Output is correct
39 Correct 6 ms 4852 KB Output is correct
40 Correct 5 ms 4852 KB Output is correct
41 Correct 5 ms 4852 KB Output is correct
42 Correct 5 ms 4852 KB Output is correct
43 Correct 6 ms 4852 KB Output is correct
44 Correct 9 ms 4852 KB Output is correct
45 Correct 8 ms 4852 KB Output is correct
46 Correct 8 ms 4852 KB Output is correct
47 Correct 9 ms 4852 KB Output is correct
48 Correct 8 ms 4852 KB Output is correct
49 Correct 5 ms 4852 KB Output is correct
50 Correct 5 ms 4852 KB Output is correct
51 Correct 5 ms 4852 KB Output is correct
52 Correct 5 ms 4852 KB Output is correct
53 Correct 5 ms 4852 KB Output is correct
54 Correct 5 ms 4852 KB Output is correct
55 Correct 4 ms 4852 KB Output is correct
56 Correct 4 ms 4852 KB Output is correct
57 Correct 4 ms 4852 KB Output is correct
58 Correct 4 ms 4852 KB Output is correct
59 Correct 375 ms 4940 KB Output is correct
60 Correct 348 ms 4940 KB Output is correct
61 Correct 399 ms 5096 KB Output is correct
62 Correct 406 ms 5096 KB Output is correct
63 Correct 443 ms 5096 KB Output is correct
64 Correct 816 ms 5124 KB Output is correct
65 Correct 877 ms 5124 KB Output is correct
66 Correct 813 ms 5164 KB Output is correct
67 Correct 762 ms 5256 KB Output is correct
68 Correct 746 ms 5256 KB Output is correct
69 Correct 304 ms 5256 KB Output is correct
70 Correct 297 ms 5256 KB Output is correct
71 Correct 309 ms 5256 KB Output is correct
72 Correct 350 ms 5256 KB Output is correct
73 Correct 342 ms 5256 KB Output is correct
74 Correct 91 ms 5256 KB Output is correct
75 Correct 74 ms 5256 KB Output is correct
76 Correct 78 ms 5256 KB Output is correct
77 Correct 76 ms 5256 KB Output is correct
78 Correct 78 ms 5256 KB Output is correct