#include <bits/stdc++.h>
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2")
// #define ATC
#define LL long long
#define eb emplace_back
#define writesp(x) write(x), putchar(' ')
#define writeln(x) write(x), putchar('\n')
#define FIO(FILENAME) freopen(FILENAME".in", "r", stdin), freopen(FILENAME".out", "w", stdout)
using namespace std;

#ifdef ATC
#include <atcoder/all>
using namespace atcoder;
#endif

namespace IO {
    char ibuf[(1 << 20) + 1], *iS, *iT;
#if ONLINE_JUDGE
#define gh() (iS == iT ? iT = (iS = ibuf) + fread(ibuf, 1, (1 << 20) + 1, stdin), (iS == iT ? EOF : *iS++) : *iS++)
#else
#define gh() getchar()
#endif
    inline long long read() {
        char ch = gh();
        long long x = 0;
        bool t = 0;
        while (ch < '0' || ch > '9') t |= ch == '-', ch = gh();
        while (ch >= '0' && ch <= '9') x = (x << 1) + (x << 3) + (ch ^ 48), ch = gh();
        return t ? ~(x - 1) : x;
    }
    template<typename _Tp>
    inline void write(_Tp x) {
        static char stk[64], *top = stk;
        if (x < 0) {
            x = ~(x - 1);
            putchar('-');
        }
        do *top++ = x % 10, x /= 10;
        while (x);
        while (top != stk) putchar((*--top) | 48);
    }
}

using IO::read;
using IO::write;


inline void slv () {
    int n = read(), x = read(), y = read();
    vector<tuple<int, int, int, int>> as;
    for (int i = 1; i < min(x, y); i++) 
        as.eb(i, i, n - i, n - i);
    int b = min(x, y);
    if (x < y) {
        int sx = x + 1, sy = y - 1, d = 1;
        while (sx <= y) {
            as.eb(sx, sy, d, -d);
            ++d, ++sx, --sy;
        }
        x = y;
    } else {
        int sx = x - 1, sy = y + 1, d = 1;
        while (sy <= x) {
            as.eb(sx, sy, -d, d);
            ++d, --sx, ++sy;
        }
        y = x;
    }
    for (int i = x + 1; i <= n; i++) as.eb(i, i, b - i, b - i);
    writeln(as.size());
    for (auto [x, y, z, w] : as) writesp(x), writesp(y), writesp(z), writeln(w);
}

int main() {
    int T = 1;
    while (T--) slv();
    return 0;
}
// I love WHQ!