oj.uz

답안 #48379

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
48379 2018-05-12T11:17:13 Z BThero Boat (APIO16_boat) C++17
9 / 100
 2000 ms 524288 KB 
// Why am I so stupid? :c
#include <bits/stdc++.h>

#define pb push_back
#define mp make_pair

#define all(x) (x).begin(), (x).end()

#define fi first
#define se second

typedef long long ll;

using namespace std;

const int mod = 1e9+7;

pair <int, int> l[505];

pair <int, int> r[505];

int dp[2][1000005];

int dp2[1000005];

int rl[1005];

int n, m;

int ans;

int now;

void addMod(int &a, int b) {
    a += b;

    if (mod <= a) {
        a -= mod;
    }
}

void compress() {
    vector <int> vv;

    for (int i = 1; i <= n; ++i) {
        for (int j = l[i].fi; j <= r[i].fi; ++j) {
            vv.pb(j);
        }
    }

    sort(all(vv));
    vv.resize(unique(all(vv)) - vv.begin());

    m = vv.size();

    for (int i = 1; i <= n; ++i) {
        l[i].se = upper_bound(all(vv), l[i].fi) - vv.begin();
        r[i].se = upper_bound(all(vv), r[i].fi) - vv.begin();
    }
}

void solve() {
    scanf("%d", &n);

    for (int i = 1; i <= n; ++i) {
        scanf("%d %d", &l[i].fi, &r[i].fi);
    }

    compress();

    for (int i = 1; i <= n; ++i) {
        now ^= 1;

        for (int j = l[i].se; j <= r[i].se; ++j) {
            dp[now][j] = 1;
        }

        for (int j = l[i].se; j <= r[i].se; ++j) {
            for (int k = 1; k < j; ++k) {
                addMod(dp[now][j], dp2[k]);
            }
        }

        for (int j = l[i].se; j <= r[i].se; ++j) {
            addMod(dp2[j], dp[now][j]);
        }
    }

    for (int i = 1; i <= m; ++i) {
        addMod(ans, dp2[i]);
    }

    printf("%d\n", ans);
}

int main() {
#ifdef BThero
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif // BThero

    int tt = 1;

    while (tt--) {
        solve();
    }

    return 0;
}

Compilation message

boat.cpp: In function 'void solve()':
boat.cpp:63:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
boat.cpp:66:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &l[i].fi, &r[i].fi);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 428 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 580 KB Output is correct
6 Correct 2 ms 580 KB Output is correct
7 Correct 2 ms 580 KB Output is correct
8 Correct 2 ms 580 KB Output is correct
9 Correct 2 ms 580 KB Output is correct
10 Correct 2 ms 580 KB Output is correct
11 Correct 2 ms 612 KB Output is correct
12 Correct 2 ms 612 KB Output is correct
13 Correct 2 ms 612 KB Output is correct
14 Correct 2 ms 616 KB Output is correct
15 Correct 2 ms 712 KB Output is correct
16 Correct 2 ms 712 KB Output is correct
17 Correct 2 ms 712 KB Output is correct
18 Correct 2 ms 712 KB Output is correct
19 Correct 2 ms 712 KB Output is correct
20 Correct 2 ms 712 KB Output is correct

Subtask #2
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 428 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 580 KB Output is correct
6 Correct 2 ms 580 KB Output is correct
7 Correct 2 ms 580 KB Output is correct
8 Correct 2 ms 580 KB Output is correct
9 Correct 2 ms 580 KB Output is correct
10 Correct 2 ms 580 KB Output is correct
11 Correct 2 ms 612 KB Output is correct
12 Correct 2 ms 612 KB Output is correct
13 Correct 2 ms 612 KB Output is correct
14 Correct 2 ms 616 KB Output is correct
15 Correct 2 ms 712 KB Output is correct
16 Correct 2 ms 712 KB Output is correct
17 Correct 2 ms 712 KB Output is correct
18 Correct 2 ms 712 KB Output is correct
19 Correct 2 ms 712 KB Output is correct
20 Correct 2 ms 712 KB Output is correct
21 Execution timed out 2061 ms 4816 KB Time limit exceeded
22 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 785 ms 524288 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 428 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 580 KB Output is correct
6 Correct 2 ms 580 KB Output is correct
7 Correct 2 ms 580 KB Output is correct
8 Correct 2 ms 580 KB Output is correct
9 Correct 2 ms 580 KB Output is correct
10 Correct 2 ms 580 KB Output is correct
11 Correct 2 ms 612 KB Output is correct
12 Correct 2 ms 612 KB Output is correct
13 Correct 2 ms 612 KB Output is correct
14 Correct 2 ms 616 KB Output is correct
15 Correct 2 ms 712 KB Output is correct
16 Correct 2 ms 712 KB Output is correct
17 Correct 2 ms 712 KB Output is correct
18 Correct 2 ms 712 KB Output is correct
19 Correct 2 ms 712 KB Output is correct
20 Correct 2 ms 712 KB Output is correct
21 Execution timed out 2061 ms 4816 KB Time limit exceeded
22 Halted 0 ms 0 KB -