线段树背诵用模板

#include <cstdio>
#define lson o<<1, l, m
#define rson o<<1|1, m+1, r
typedef long long LL;
const int maxn = 100005;

int n, a, b, c, k, q;
LL sum[maxn<<2], add[maxn<<2], mul[maxn<<2], p;

void up(int o) {
sum[o] = (sum[o<<1]+sum[o<<1|1]) %p;
}

void build(int o, int l, int r) {
add[o] = 0, mul[o] = 1;
if(l == r) {
scanf("%lld", &sum[o]);
return;
}
int m = (l+r) >> 1;
build(lson);
build(rson);
up(o);
}

void down(int o, int len) {
// if(add[o] != 0 && mul[o] != 1) {
add[o<<1] = (add[o<<1] * mul[o] + add[o]) %p;
add[o<<1|1] = (add[o<<1|1] * mul[o] + add[o]) %p;
mul[o<<1] = mul[o<<1] * mul[o] %p;
mul[o<<1|1] = mul[o<<1|1] * mul[o] %p;
sum[o<<1] = (sum[o<<1] * mul[o] + add[o] * (len-(len>>1))) %p;
sum[o<<1|1] = (sum[o<<1|1] * mul[o] + add[o] * (len>>1)) %p;
add[o] = 0, mul[o] = 1;
// }
}

void update(int o, int l, int r, int op) {
if(a <= l && r <= b) {
if(op == 1) {
add[o] = add[o]*c %p;
mul[o] = mul[o]*c %p;
sum[o] = sum[o]*c %p;
} else {
add[o] = (add[o] + c) %p;
sum[o] = (sum[o] + (LL)c*(r-l+1)) %p;
}
return;
}
down(o, r-l+1);
int m = (l+r) >> 1;
if(a <= m) update(lson, op);
if(m < b ) update(rson, op);
up(o);
}

LL query(int o, int l, int r) {
if(a <= l && r <= b) return sum[o] %p;
down(o, r-l+1);
int m = (l+r) >> 1;
LL ans = 0;
if(a <= m) ans = query(lson);
if(m < b ) ans += query(rson);
return ans %p;
}

int main()
{
scanf("%d%lld", &n, &q);scanf("%d", &p);
build(1, 1, n);

while(q--) {
scanf("%d%d%d", &k, &a, &b);
if(k != 3) {
scanf("%d", &c);
update(1, 1, n, k);
} else printf("%lld\n", query(1, 1, n));
}
return 0;
}