P4588 [TJOI2018]数学计算

#include <bits/stdc++.h>
#define LL long long
using namespace std;
const int N = 2e5 + 10;
int T, n, m, p;
int w[N];
struct node {
    int l, r;
    int mul;
}tr[N << 2];
void pushup(int u)
{
    tr[u].mul = (LL)tr[u << 1].mul * tr[u << 1 | 1].mul % m;
}
void build(int u, int l, int r)
{
    tr[u] = {l, r, 1};
    if (l == r)  return;
    int mid = l + r >> 1;
    build(u << 1, l, mid);
    build(u << 1 | 1, mid + 1, r);
    pushup(u);
}
void modify(int u, int x, int d)
{
    if (tr[u].l == x  && tr[u].r == x) {
        tr[u].mul = d % m;
        return;
    }
    int mid = tr[u].l + tr[u].r >> 1;
    if (x <= mid)   modify(u << 1, x, d);
    if (x > mid)    modify(u << 1 | 1, x, d);
    pushup(u);
}
void modify1(int u, int x)
{
    if (tr[u].l == x && tr[u].r == x) {
        tr[u].mul = 1;
        return;
    }
    int mid = tr[u].l + tr[u].r >> 1;
    if (x <= mid)   modify1(u << 1, x);
    if (x > mid)    modify1(u << 1 | 1, x);
    pushup(u);
}
int main() {
    scanf("%d", &T);
    while (T -- ) {
        scanf("%d%d", &n, &m);
        build(1, 1, n);
        int pos = 1;
        while (n -- ) {
            int t, x;
            scanf("%d%d", &t, &x);
            if (t == 1) {
                modify(1, pos, x);
                printf("%d\n", tr[1].mul);
            }
            else {
                modify1(1, x);
                printf("%d\n", tr[1].mul);
            }
            pos ++;
        }
    }
    return 0;
}

标签：P4588,struct,int,namespace,mid,long,const,数学计算,TJOI2018
来源： https://www.cnblogs.com/Angels-of-Death/p/15864601.html