Submission #35236

#	Time	Username	Problem	Language	Result	Execution time	Memory
35236		bql20000	마스코트 (JOI13_mascots)	C++14	100 / 100	283 ms	213936 KiB

mascots

#include <bits/stdc++.h>

#define ff(i,a,b)       for(int i=(a), _b=(b); i<=_b; ++i)
#define gg(i,a,b)       for(int i=(a), _b=(b); i>=_b; --i)
#define REP(i,b)        for(int i=(0), _b=(b); i< _b; ++i)
#define endl            '\n'
#define long            long long
#define ALL(x)          (x).begin(), (x).end()
#define Love(a)         {cerr << #a << " = " << a << endl;}
#define _               << "," <<
#define BIT(i, x)       (((x)>>(i))&1)
#define X               first
#define Y               second

#define NAME            "MASCOTS"

using namespace std;
const int N = 3e3 + 7;
const int MOD = 1e9 + 7;

int n, m, k, a, b, c, d;
long p[N*N], ans, dp[N][N], CC[N][N];

void Enter() {
    scanf("%d%d%d", &m, &n, &k);

    a = N;
    b = N;

    ff(i, 1, k) {
        int x , y;
        scanf("%d%d", &x, &y);
        a = min(a, x);
        c = max(c, x);
        b = min(b, y);
        d = max(d, y);
    }

    p[0] = 1;
    ff(i, 1, n*m) p[i] = p[i-1] * i % MOD;
    ans = p[(c-a+1)*(d-b+1)-k];
}

inline void Add(long &a, long b) {
    a += b;
    if (a > MOD) a -= MOD;
}

void Init() {
    int V = max(m, n);
    ff(i, 0, V) CC[0][i] = 1;
    ff(i, 1, V)
        ff(j, i, V)
            CC[i][j] = (CC[i-1][j-1] + CC[i][j-1]) % MOD;
}

void Process() {
    Init();
    dp[m][n] = 1;
    gg(i, m, 1)
        gg(j, n, 1) {
            if (i < m) Add(dp[i][j], dp[i+1][j] * p[j] % MOD);
            if (j < n) Add(dp[i][j], dp[i][j+1] * p[i] % MOD);
        }

    printf("%d", ans * dp[c-a+1][d-b+1] % MOD * CC[a-1][m-(c-a+1)] % MOD * CC[b-1][n-(d-b+1)] % MOD);
}

int main() {
    //ios_base::sync_with_stdio(0); cin.tie(0);
    //freopen(NAME".inp", "r", stdin);
    //freopen(NAME".out", "w", stdout);
    Enter();
    Process();
    return 0;
}

Compilation message (stderr)

mascots.cpp: In function 'void Process()':
mascots.cpp:66:100: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
     printf("%d", ans * dp[c-a+1][d-b+1] % MOD * CC[a-1][m-(c-a+1)] % MOD * CC[b-1][n-(d-b+1)] % MOD);
                                                                                                    ^
mascots.cpp: In function 'void Enter()':
mascots.cpp:25:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d", &m, &n, &k);
                                ^
mascots.cpp:32:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &x, &y);
                              ^

• Subtask 1: 10 / 10
• Subtask 2: 30 / 30
• Subtask 3: 60 / 60