线段树

#include <cstdio>
#include <cstring>
#include <algorithm>

using namespace std;

const int INF = 0x3f3f3f3f;
const int maxn = 105;

int a[maxn];
int add[maxn << 2], col[maxn << 2];
int minv[maxn << 2], maxv[maxn << 2], sum[maxn << 2];

void maintain(int o, int L, int R)
{
    if(L >= R) return ;
    int lc = o << 1, rc = o << 1 | 1;
    sum[o] = sum[lc] + sum[rc];
    maxv[o] = max(maxv[lc], maxv[rc]);
    minv[o] = min(minv[lc], minv[rc]);
}

void pushdown(int o, int L, int R)
{
    if(L >= R) return ;
    int M = (L + R) >> 1, lc = o << 1, rc = o << 1 | 1;
    if(col[o])
    {
        col[lc] = col[rc] = col[o];
        add[lc] = add[rc] = 0;
        sum[lc] = col[o] * (M-L+1);
        sum[rc] = col[o] * (R-M);
        maxv[lc] = maxv[rc] = minv[lc] = minv[rc] = col[o];
        col[o] = 0;
    }
    if(add[o])
    {
        add[lc] += add[o]; add[rc] += add[o];
        sum[lc] += add[o] * (M-L+1); sum[rc] += add[o] * (R-M);
        maxv[lc] += add[o]; maxv[rc] += add[o];
        minv[lc] += add[o]; minv[rc] += add[o];
        add[o] = 0;
    }
}

int op, qv, _sum, _max, _min;

void update(int o, int L, int R, int ql, int qr)
{
    if(L == ql && qr == R)
    {
        if(op == 1)//add
        {
            add[o] += qv;
            maxv[o] += qv;
            minv[o] += qv;
            sum[o] += qv * (R-L+1);
        }
        else//set
        {
            col[o] = maxv[o] = minv[o] = qv;
            add[o] = 0;
            sum[o] = qv * (R-L+1);
        }
    }
    else
    {
        pushdown(o, L, R);
        int M = (L + R) >> 1;
        if(qr <= M) update(o << 1, L, M, ql, qr);
        else if(M < ql) update(o << 1 | 1, M+1, R, ql, qr);
        else
        {
            update(o << 1, L, M, ql, M);
            update(o << 1 | 1, M+1, R, M+1, qr);
        }
        maintain(o, L, R);
    }
}

void query(int o, int L, int R, int ql, int qr)
{
    if(L == ql && qr == R)
    {
        _sum += sum[o];
        _max = max(_max, maxv[o]);
        _min = min(_min, minv[o]);
    }
    else
    {
        pushdown(o, L, R);
        int M = (L + R) >> 1;
        if(qr <= M) query(o << 1, L, M, ql, qr);
        else if(M < ql) query(o << 1 | 1, M+1, R, ql, qr);
        else
        {
            query(o << 1, L, M, ql, M);
            query(o << 1 | 1, M+1, R, M+1, qr);
        }
        maintain(o, L, R);
    }
}

void build(int o, int L, int R)
{
    if(L == R) maxv[o] = minv[o] = sum[o] = a[L];
    else
    {
        int M = (L + R) >> 1;
        build(o << 1, L, M);
        build(o << 1 | 1, M+1, R);
        maintain(o, L, R);
    }
}

int main()
{
    freopen("input.txt","r",stdin);
    freopen("out2.txt","w",stdout);

    int n, q;
    scanf("%d%d", &n, &q);
    for(int i = 1; i <= n; i++) scanf("%d", &a[i]);
    build(1, 1, n);
    while(q--)
    {
        int ql, qr;
        scanf("%d", &op);
        if(op <= 2)
        {
            scanf("%d%d%d", &ql, &qr, &qv);
            update(1, 1, n, ql, qr);
        }
        else
        {
            scanf("%d%d", &ql, &qr);
            _sum = _max = 0; _min = INF;
            query(1, 1, n, ql, qr);
            printf("%d %d %d\n", _min, _max, _sum);
        }
    }

    fclose(stdin);
    fclose(stdout);
    return 0;
}