[BOJ] 14969 : Taro`s Shopping

#include <cstdio>

int n, m, a[1001];
int main() {
    while (1) {
        scanf("%d %d", &n, &m);
        if (!n && !m) {
            return 0;
        }
        for (int i = 0; i < n; i++) {
            scanf("%d", a + i);
        }

        int res = -1;
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n; j++) {
                if (i == j) {
                    continue;
                }
                int s = a[i] + a[j];
                if (s <= m && s > res) res = s;
            }
        }
        if (res != -1) {
            printf("%d\n", res);
        }
        else {
            printf("NONE\n");
        }
    }

    return 0;
}