#include<bits/stdc++.h>

using namespace std;

struct pt {
    int to, w, node;
};

typedef long long ll;
int const maxn = 2e5 + 5, K = 50;
string s;
int numb[maxn], tmp = 1;
ll h[maxn], ans;
vector < pair < int, int > > g[maxn];
pair < int, int > dp[(1 << 19)][K];
pair < int, int > f[K];
vector < pt > G[K];
int ok[maxn];

void dfs(int v, int p, int cur) {
    int flag = 1;
    numb[v] = cur;
    for (auto [u, w] : g[v]) {
        if (u == p) continue;
        h[u] = h[v] + w;
        if (flag) dfs(u, v, cur), flag = 0;
        else {
            G[cur].push_back({tmp, w, v});
            dfs(u, v, tmp++);
        }
    }
}

inline pair < int, int > merge(pair < int, int > a, pair < int, int > b) {
    if (a.first == -1 || (b.first != -1 && h[a.first] > h[b.first])) a.first = b.first;
    if (a.second == -1 || (a.second != -1 && h[a.second] < h[b.second])) a.second = b.second;
    return a;
}

void build(int i, int l, int r) {
    if (r - l == 1) {
        for (int j = 0; j < tmp; j++) {
            dp[i][j] = {-1, -1};
        }
        if (s[l] == '1') dp[i][numb[l]] = {l, l};
    } else {
        int m = (r + l) / 2;
        build(2 * i + 1, l, m);
        build(2 * i + 2, m, r);
        for (int j = 0; j < tmp; j++) {
            dp[i][j] = merge(dp[2 * i + 1][j], dp[2 * i + 2][j]);
        }
    }
}

void update(int i, int l, int r, int lq) {
    if (r - l == 1) {
        if (s[lq] == '1') s[lq] = '0';
        else s[lq] = '1';
        for (int j = 0; j < tmp; j++) {
            dp[i][j] = {-1, -1};
        }
        if (s[l] == '1') dp[i][numb[l]] = {l, l};
    } else {
        int m = (r + l) / 2;
        if (lq < m) update(2 * i + 1, l, m, lq);
        else update(2 * i + 2, m, r, lq);
        for (int j = 0; j < tmp; j++) {
            dp[i][j] = merge(dp[2 * i + 1][j], dp[2 * i + 2][j]);
        }
    }
}

void get(int i, int l, int r, int lq, int rq) {
    if (lq >= r || l >= rq) return;
    if (lq <= l && r <= rq) {
        for (int j = 0; j < tmp; j++) f[j] = merge(f[j], dp[i][j]);
        return;
    }
    int m = (r + l) / 2;
    get(2 * i + 1, l, m, lq, rq);
    get(2 * i + 2, m, r, lq, rq);
}

void calc(int v) {
    ok[v] = 0;
    if (f[v].first != -1) ok[v] = 1;
    for (auto u : G[v]) {
        calc(u.to);
        ok[v] |= ok[u.to];
    }
}

void get(int v, int s) {
    for (auto u : G[v]) {
        s += ok[u.to];
    }
    s += ok[v];
    for (auto u : G[v]) {
        if (s - ok[u.to] > 0) {
            f[u.to].first = u.node;
            get(u.to, 1);
        } else {
            get(u.to, 0);
        }
        if (ok[u.to]) {
            if (f[v].second == -1 || h[f[v].second] < h[u.node]) f[v].second = u.node;
            if (f[v].first == -1 || h[f[v].first] > h[u.node]) f[v].first = u.node;
        }
    }
}

main() {
#ifdef HOME
    freopen("input.txt", "r", stdin);
#endif // HOME
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n, q, u, v, w, l, r, type;
    cin >> n >> q;
    cin >> s;
    s = "#" + s;
    for (int i = 1; i < n; i++) {
        cin >> u >> v >> w;
        g[u].push_back({v, w});
        g[v].push_back({u, w});
    }
    dfs(1, 0, 0);
    build(0, 1, n + 1);
    for (int i = 1; i <= q; i++) {
        cin >> type;
        if (type == 2) {
            cin >> l >> r;
            for (int j = 0; j < tmp; j++) f[j] = {-1, -1};
            get(0, 1, n + 1, l, r + 1);
            ans = 0;
            calc(0);
            get(0, 0);
            int flag = 0;
            for (int j = 0; j < tmp; j++) {
                if (f[j].first == -1) f[j].first = f[j].second;
                else if (f[j].second == -1) f[j].second = f[j].first;
                //cout << f[j].first << " " << f[j].second << endl;
                if (f[j].first != -1) ans += h[f[j].second] - h[f[j].first], flag = 1;
            }
            if (flag) cout << 2 * ans << '\n';
            else cout << -1 << '\n';
        } else {
            cin >> u;
            update(0, 1, n + 1, u);
        }
    }
    return 0;
}