Submission #837587

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Source Code Expand

#include <iostream>
#include <cstdio>
#include <vector>
#include <set>
#include <deque>
#include <algorithm>
#include <queue>
#include <cmath>
#include <map>
#include <complex>
#include <cstring>
#include <iomanip>
#include <bitset>

using namespace std;
#define rep(i, a, b) for(int i = (a); i < (b); i++)
#define repd(i, a, b) for(int i = (a); i > (b); i--)
#define forIt(it, a) for(__typeof((a).begin()) it = (a).begin(); it != (a).end(); it++)
#define forRev(it, a) for(__typeof((a).rbegin()) it = (a).rbegin(); it != (a).rend(); it++)
#define ft(a) __typeof((a).begin())
#define ll long long
#define ld long double
#define fi first
#define se second
#define mk make_pair
#define pb push_back
#define sz(a) (int)(a).size()
#define all(a) (a).begin(), (a).end()
#define Rep(i,n) for(int i = 0; i < (n); ++i)
#define bitcount(n) __builtin_popcountll(n)


typedef complex<ld> cplex;
typedef vector<int> vi;
typedef pair<int, int> ii;
typedef pair<ii, int> iii;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef pair<ll, ll> pll;

const int N = 400 + 7;
const int M = 30;
const int inf = 1e9 + 7;
const long long linf = (ll) inf * inf + 7;
const double pi = acos(-1);
const double eps = 1e-20;
const bool multipleTest = false;


int f[N][N];

int n, C;
int a[N], b[N];

ll dp[N][N];


void solve() {
    for(int u = 1; u < N; ++u) {
        f[u][0] = u;
        int t = u;
        for(int c = 1; c < N; ++c) {
            f[u][c] = (f[u - 1][c] + t) % inf;
            t = (ll) t * u % inf;
        }
    }
    cin >> n >> C;
    for(int i = 1; i <= n; ++i) scanf("%d", a + i);
    for(int j = 1; j <= n; ++j) scanf("%d", b + j);
    dp[0][0] = 1;
    for(int i = 1; i <= n; ++i) {
        dp[i][0] = dp[i - 1][0] * (f[b[i]][0] - f[a[i] - 1][0] + inf) % inf;
        for(int c = 1; c <= C; ++c) {
            for(int cur = 0; cur <= c; ++cur) {
                dp[i][c] = (dp[i][c] + dp[i - 1][c - cur] * (f[b[i]][cur] - f[a[i] - 1][cur] + inf)) % inf;
            }
        }
    }
    
    cout << dp[n][C];
    
    
    
}

int main() {
//#ifndef ONLINE_JUDGE
//    freopen("in.txt", "r", stdin);
//    auto t1 = clock();
//#endif

    
    int Test = 1;
    if (multipleTest) {
        cin >> Test;
    }
    
    for(int i = 0; i < Test; ++i) {
        solve();
    }
    
//#ifndef ONLINE_JUDGE
//    printf("\n%.9lf\n", (0.0 + clock() - t1) / CLOCKS_PER_SEC);
//#endif
}

Submission Info

Compile Error

./Main.cpp: In function ‘void solve()’:
./Main.cpp:68:51: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     for(int i = 1; i <= n; ++i) scanf("%d", a + i);
                                                   ^
./Main.cpp:69:51: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     for(int j = 1; j <= n; ++j) scanf("%d", b + j);
                                                   ^

Judge Result