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| #include<bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#define debug(...) fprintf(stdout, ##__VA_ARGS__)
#else
#define debug(...) void(0)
#endif
inline int read(){int x=0,f=1;char ch=getchar();
while(ch<'0'||ch>'9'){if(ch=='-')f=-1;
ch=getchar();}while(ch>='0'&&ch<='9'){x=(x<<1)+
(x<<3)+(ch^48);ch=getchar();}return x*f;}
#define Z(x) (x)*(x)
#define pb push_back
#define fi first
#define se second
#define N 500010
int n, m, i, j, k, root;
struct fhq_treap {
int tot, ls[N], rs[N], w[N], a[N], pri[N];
int s[N], sl[N], sr[N], mx[N], b[N];
bool tag[N];
queue<int> q;
int st[500010], top;
void push_up(int k) {
if(ls[k]) push_down(ls[k]);
if(rs[k]) push_down(rs[k]);
w[k] = 1 + w[ls[k]] + w[rs[k]];
s[k] = s[ls[k]] + s[rs[k]] + a[k];
sl[0] = sr[0] = mx[0] = -2e9;
sl[k] = max({sl[ls[k]], s[ls[k]] + a[k], s[ls[k]] + a[k] + sl[rs[k]]});
sr[k] = max({sr[rs[k]], s[rs[k]] + a[k], s[rs[k]] + a[k] + sr[ls[k]]});
mx[k] = max(mx[ls[k]], mx[rs[k]]);
mx[k] = max(mx[k], max(0, sr[ls[k]]) + a[k] + max(0, sl[rs[k]]));
sl[0] = sr[0] = mx[0] = 0;
}
void push_down(int k) {
if(b[k] != 1e9) {
if(ls[k]) b[ls[k]] = b[k];
if(rs[k]) b[rs[k]] = b[k];
s[k] = b[k] * w[k]; a[k] = b[k];
sl[k] = sr[k] = mx[k] = max(b[k], b[k] * w[k]);
tag[k] = 0; b[k] = 1e9;
return ;
}
if(tag[k]) {
tag[ls[k]] ^= 1; tag[rs[k]] ^= 1; tag[k] = 0;
swap(ls[k], rs[k]);
swap(sl[k], sr[k]);
}
}
void print1(int x) {
if(!x) return;
printf("%lld(%lld) -> [%lld %lld] (%lld %lld %lld %lld)\n", a[x], w[x], a[ls[x]], a[rs[x]], s[x], sl[x], sr[x], mx[x]);
print1(ls[x]); print1(rs[x]);
}
void print2(int x) {
if(!x) return ;
print2(ls[x]); printf("%d ", a[x]); print2(rs[x]);
}
int merge(int x, int y) {
if(!x || !y) return x + y;
if(x) push_down(x); if(y) push_down(y);
if(pri[x] < pri[y]) {
rs[x] = merge(rs[x], y); push_up(x);
return x;
}
else {
ls[y] = merge(x, ls[y]); push_up(y);
return y;
}
}
void split(int k, int sze, int &x, int &y) {
if(!k) return x = y = 0, void();
push_down(k);
if(w[ls[k]] + 1 > sze) {
y = k; split(ls[k], sze, x, ls[y]);
}
else {
x = k; split(rs[k], sze - w[ls[k]] - 1, rs[x], y);
}
push_up(k);
}
int ask() {
int u;
if(!q.empty()) u = q.front(), q.pop();
else u = ++tot;
return u;
}
void insert(int val) {
int u = ask(); w[u] = 1; pri[u] = rand();
a[u] = s[u] = sl[u] = sr[u] = mx[u] = val; b[u] = 1e9;
root = merge(root, u);
}
int build(int op = 0) {
int n = read(), val, top = 0, ans;
if(op) m = read();
while(n--) {
val = read();
int u = ask(), las = 0; w[u] = 1; pri[u] = rand();
a[u] = s[u] = sl[u] = sr[u] = mx[u] = val; b[u] = 1e9;
while(top && pri[st[top]] > pri[u])
las = st[top], push_up(las), --top;
ls[u] = las; push_up(u);
if(top) rs[st[top]] = u, push_up(st[top]);
else ans = u;
st[++top] = u;
}
while(top) push_up(st[top]), --top;
return ans;
}
void cun(int x) {
if(ls[x]) cun(ls[x]);
if(rs[x]) cun(rs[x]);
ls[x] = rs[x] = mx[x] = w[x] = pri[x] =
s[x] = sl[x] = sr[x] = a[x] = tag[x] = 0; b[x] = 0;
q.push(x);
}
}T;
signed main()
{
#ifdef LOCAL
freopen("in.txt", "r", stdin);
freopen("out.txt", "w", stdout);
#endif
srand(440103);
root = T.build(1);
char op[20];
for(i = 1; i <= m; ++i) {
scanf("%s", op);
if(op[0] == 'I') {
k = read();
int u = T.build(), x, y;
T.split(root, k, x, y);
root = T.merge(x, u); root = T.merge(root, y);
}
if(op[0] == 'D') {
k = read(); j = read();
if(j == 0) continue;
int x, y, z;
T.split(root, k - 1, x, y);
T.split(y, j, y, z);
root = T.merge(x, z);
T.cun(y);
}
if(op[0] == 'M' && op[6] == 'A') {
int x, y, z, c;
k = read(); j = read(); c = read();
if(j == 0) continue;
T.split(root, k - 1, x, y);
T.split(y, j, y, z);
T.b[y] = c; T.push_down(y);
root = T.merge(x, y); root = T.merge(root, z);
}
if(op[0] == 'R') {
int x, y, z;
k = read(); j = read();
if(j == 0) continue;
T.split(root, k - 1, x, y);
T.split(y, j, y, z);
T.tag[y] ^= 1; T.push_down(y);
root = T.merge(x, y); root = T.merge(root, z);
}
if(op[0] == 'G') {
int x, y, z;
k = read(); j = read();
if(j == 0) { printf("0\n"); continue; }
T.split(root, k - 1, x, y);
T.split(y, j, y, z);
T.push_down(y);
printf("%d\n", T.s[y]);
root = T.merge(x, y); root = T.merge(root, z);
}
if(op[0] == 'M' && op[6] == 'M') {
printf("%d\n", T.mx[root]);
}
}
return 0;
}
|
