int monta(int ini, int fim) {
int at = cabeca++;
tree[at].ini = ini;
tree[at].fim = fim;
tree[at].trocas = 0;
if(ini == fim) {
tree[at].esq = tree[at].dir = -1;
tree[at].qtd[1] = tree[at].qtd[2] = 0;
tree[at].qtd[0] = 1;
return at;
}
int e = tree[at].esq = monta(ini, (ini+fim)/2);
int d = tree[at].dir = monta((ini+fim)/2 + 1, fim);
for(int i = 0; i < 3; i++) {
tree[at].qtd[i] = tree[e].qtd[i] + tree[d].qtd[i];
}
return at;
}
int main() {
int n,q,op,a,b;
scanf("%d %d", &n, &q);
cabeca = 0; monta(0,n-1);
for(int i = 0; i < q; i++) {
scanf("%d %d %d", &op, &a, &b);
if(op == 0) {
soma(0,a,b);
} else {
printf("%d\n", query(a,b));
}
}
}
int main () {
while(scanf("%d %d", &m, &n) != EOF && n && m) {
for (int i = 0; i < n; i++) {
scanf("%d", &v[i]);
}
for (int i = 0; i <= m; i++) {
memo[i] = 0;
}
monta(m);
if (memo[m] >= 50010) printf("Impossivel\n");
else printf("%d\n", memo[m]);
}
}
int monta (int p) {
int min, aux;
if (p == 0) return 0;
if (memo[p]) {
// printf("memo[%d] == %d\n", p, memo[p]);
return memo[p];
}
min = 50010;
for (int i = 0; i < n; i++) {
if (p >= v[i]) {
aux = monta(p-v[i]) + 1;
// printf("%d - %d = %d -> %d\n", p, v[i], p-v[i], aux);
if (aux < min) min = aux;
}
}
memo[p] = min;
return min;
}