Submission #1487734

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Source Code Expand

#include <iostream>
#include <vector>
#include <algorithm>
#include <utility>

using namespace std;
using llng = long long;
template<typename T> using v = vector<T>;
template<typename T> using vv = v<v<T> >;

int main() {
    int H, W; cin >> H >> W;
    int N; cin >> N;
    v<int> a(N+1); for (int i=1; i<=N; i++) cin >> a[i];
    vv<int> c(H, v<int>(W));

    int ai = 1;
    for (int i=0; i<H; i++) {
        if (i % 2 == 0) {
            for (int j=0; j<W; j++) {
                c[i][j] = ai;
                a[ai]--; if (a[ai] == 0) ai++;
            }
        } else {
            for (int j=W-1; j>=0; j--) {
                c[i][j] = ai;
                a[ai]--; if (a[ai] == 0) ai++;
            }
        }
    }

    for (int i=0; i<H; i++) {
        for (int j=0; j<W; j++) {
            cout << c[i][j] << " ";
        }
        cout << endl;
    }
    return 0;
}

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