oj.uz

Submission #342021

# Submission time Handle Problem Language Result Execution time Memory
342021 2021-01-01T05:49:34 Z thecodingwizard Boat (APIO16_boat) C++11
9 / 100
 419 ms 6380 KB 
#include <bits/stdc++.h>

using namespace std;

using ll = long long;
#define ii pair<int, int>
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define F0R(i, n) for (int i = 0; i < n; i++)
#define FOR(i, a, b) for (int i = a; i < b; i++)
#define inf 1000000010

const int mod = 1e9+7;

int main() {
    cin.tie(0)->sync_with_stdio(0);

    int n; cin >> n;
    ii A[n];
    map<int, int> compress;
    set<int> setValues; setValues.insert(0); setValues.insert(1);
    F0R(i, n) {
        cin >> A[i].f >> A[i].s;
        A[i].s++;
        setValues.insert(A[i].f);
        setValues.insert(A[i].s);
    }
    int idx = 0;
    vector<int> values;
    for (auto x : setValues) {
        compress[x] = idx;
        values.pb(x);
        idx++;
    }
    F0R(i, n) {
        A[i].f = compress[A[i].f];
        A[i].s = compress[A[i].s];
    }

    int ct[values.size()][n+1];
    F0R(i, values.size()-1) {
        F0R(j, n+1) {
            if (j == 0) ct[i][j] = 1;
            else {
                int len = values[i+1]-values[i];
                ct[i][j] = (ll)ct[i][j-1]*(len-(j-1))/j%mod;
            }
        }
        FOR(j, 2, n+1) {
            ct[i][j] = (ct[i][j] + ct[i][j-1]) % mod;
        }
        ct[i][0] = 0;
    }

    int dp[n][values.size()];
    int dpSum[n][values.size()];
    F0R(i, n) {
        F0R(j, values.size()-1) {
            if (j == 0) { dp[i][j] = 1; continue; }

            dp[i][j] = 0;
            int num = 0;
            for (int k = i-1; k >= -1; k--) {
                if (A[k+1].f <= j && A[k+1].s > j) {
                    num++;
                    //cout << (k>=0?dpSum[k][j-1]:1) << " " << j << " " << num << endl;
                    dp[i][j] = (dp[i][j] + (ll)(k>=0?dpSum[k][j-1]:1)*ct[j][num])%mod;
                }
            }

            //cout << "dp[" << i << "][" << j << "]: " << dp[i][j] << endl;
        }
        F0R(j, values.size()-1) {
            dpSum[i][j] = ((j?dpSum[i][j-1]:0)+dp[i][j])%mod;
        }
    }

    ll ans = 0;
    FOR(j, 1, values.size()-1) {
        ans = (ans + dp[n-1][j]) % mod;
    }
    cout << ans << endl;

    return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:13:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 | #define F0R(i, n) for (int i = 0; i < n; i++)
......
   45 |     F0R(i, values.size()-1) {
      |         ~~~~~~~~~~~~~~~~~~           
boat.cpp:45:5: note: in expansion of macro 'F0R'
   45 |     F0R(i, values.size()-1) {
      |     ^~~
boat.cpp:13:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 | #define F0R(i, n) for (int i = 0; i < n; i++)
......
   62 |         F0R(j, values.size()-1) {
      |             ~~~~~~~~~~~~~~~~~~       
boat.cpp:62:9: note: in expansion of macro 'F0R'
   62 |         F0R(j, values.size()-1) {
      |         ^~~
boat.cpp:13:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 | #define F0R(i, n) for (int i = 0; i < n; i++)
......
   77 |         F0R(j, values.size()-1) {
      |             ~~~~~~~~~~~~~~~~~~       
boat.cpp:77:9: note: in expansion of macro 'F0R'
   77 |         F0R(j, values.size()-1) {
      |         ^~~
boat.cpp:14:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 | #define FOR(i, a, b) for (int i = a; i < b; i++)
......
   83 |     FOR(j, 1, values.size()-1) {
      |         ~~~~~~~~~~~~~~~~~~~~~           
boat.cpp:83:5: note: in expansion of macro 'FOR'
   83 |     FOR(j, 1, values.size()-1) {
      |     ^~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 290 ms 6380 KB Output is correct
2 Correct 289 ms 6380 KB Output is correct
3 Correct 288 ms 6380 KB Output is correct
4 Correct 282 ms 6380 KB Output is correct
5 Correct 283 ms 6332 KB Output is correct
6 Correct 177 ms 6380 KB Output is correct
7 Correct 171 ms 6380 KB Output is correct
8 Correct 177 ms 6380 KB Output is correct
9 Correct 186 ms 6380 KB Output is correct
10 Correct 173 ms 6380 KB Output is correct
11 Correct 181 ms 6380 KB Output is correct
12 Correct 182 ms 6380 KB Output is correct
13 Correct 178 ms 6380 KB Output is correct
14 Correct 166 ms 6380 KB Output is correct
15 Correct 179 ms 6380 KB Output is correct
16 Correct 62 ms 1644 KB Output is correct
17 Correct 60 ms 1516 KB Output is correct
18 Correct 62 ms 1516 KB Output is correct
19 Correct 61 ms 1516 KB Output is correct
20 Correct 62 ms 1516 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 290 ms 6380 KB Output is correct
2 Correct 289 ms 6380 KB Output is correct
3 Correct 288 ms 6380 KB Output is correct
4 Correct 282 ms 6380 KB Output is correct
5 Correct 283 ms 6332 KB Output is correct
6 Correct 177 ms 6380 KB Output is correct
7 Correct 171 ms 6380 KB Output is correct
8 Correct 177 ms 6380 KB Output is correct
9 Correct 186 ms 6380 KB Output is correct
10 Correct 173 ms 6380 KB Output is correct
11 Correct 181 ms 6380 KB Output is correct
12 Correct 182 ms 6380 KB Output is correct
13 Correct 178 ms 6380 KB Output is correct
14 Correct 166 ms 6380 KB Output is correct
15 Correct 179 ms 6380 KB Output is correct
16 Correct 62 ms 1644 KB Output is correct
17 Correct 60 ms 1516 KB Output is correct
18 Correct 62 ms 1516 KB Output is correct
19 Correct 61 ms 1516 KB Output is correct
20 Correct 62 ms 1516 KB Output is correct
21 Incorrect 419 ms 5868 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 620 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 290 ms 6380 KB Output is correct
2 Correct 289 ms 6380 KB Output is correct
3 Correct 288 ms 6380 KB Output is correct
4 Correct 282 ms 6380 KB Output is correct
5 Correct 283 ms 6332 KB Output is correct
6 Correct 177 ms 6380 KB Output is correct
7 Correct 171 ms 6380 KB Output is correct
8 Correct 177 ms 6380 KB Output is correct
9 Correct 186 ms 6380 KB Output is correct
10 Correct 173 ms 6380 KB Output is correct
11 Correct 181 ms 6380 KB Output is correct
12 Correct 182 ms 6380 KB Output is correct
13 Correct 178 ms 6380 KB Output is correct
14 Correct 166 ms 6380 KB Output is correct
15 Correct 179 ms 6380 KB Output is correct
16 Correct 62 ms 1644 KB Output is correct
17 Correct 60 ms 1516 KB Output is correct
18 Correct 62 ms 1516 KB Output is correct
19 Correct 61 ms 1516 KB Output is correct
20 Correct 62 ms 1516 KB Output is correct
21 Incorrect 419 ms 5868 KB Output isn't correct
22 Halted 0 ms 0 KB -