1256C - Platforms Jumping - CodeForces Solution


greedy *1700

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Python Code:

def solution():
    def ceil_divide(a, b):
        return (a+b-1)//b

    n, m, d = list(map(int, input().split()))
    c = list(map(int, input().split()))
    if ceil_divide(n-sum(c), m+1) >= d:
        return "NO"
    q, r = divmod(n-sum(c), m+1)
    result = [0]*n
    j = 0
    for i in range(m):
        j += q+int(i < r)
        for _ in range(min(c[i],n-j)):
            result[j] = i+1
            j += 1
    j += q+int(m < r)
    assert(j == n)
    return f'YES\n{" ".join(map(str, result))}'

print(solution())

C++ Code:

#include <bits/stdc++.h>
#define int long long

using namespace std;

main() {
	ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	int n, m, d;
	cin >> n >> m >> d;
	int c[m + 5], s = 0;
	for(int i = 1; i <= m; ++i) {
		cin >> c[i];
		s += c[i];
	}
	int ans[n + 5] = {0}, h = 0, j = 1;
	for(int i = 1; i <= n; ++i) {
		if(n - i + 1 == s) {
			int k = 0;
			for(int z = i; z <= n; ++z) {
				k ++;
				ans[z] = j;
				if(k == c[j]) {
					j ++;
					k = 0;
				}
			}
			break;
		} 
		if(i == h + d) {
			if(j == m + 1) {
				cout << "NO";
				return 0;
			}
			for(int z = i; z < i + c[j]; ++z) {
				ans[z] = j;
			}
			i += c[j] - 1;
			h = i;
			s -= c[j];
			j ++;
		}
	}
	cout << "YES\n";
	for(int i = 1; i <= n; ++i) {
		cout << ans[i] << " ";
	}
}


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