#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,n) for (int i=a;i<n;i++)
#define per(i,a,n) for (int i=n-1;i>=a;i--)
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
#define SZ(x) ((int)(x).size())
typedef vector<int> VI;
typedef long long ll;
typedef pair<int,int> PII;
typedef double db;
mt19937 mrand(random_device{}());
const ll mod=1000000007;
int rnd(int x) { return mrand() % x;}
ll powmod(ll a,ll b) {ll res=1;a%=mod; assert(b>=0); for(;b;b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res;}
ll gcd(ll a,ll b) { return b?gcd(b,a%b):a;}
// head
const int N=200050;
const int inf=1e9;
int n,q,h[N],a[N],b[N],ql[N],qr[N],ans[N];
vector<PII> Qs[N][2];
struct node{
int val,mx,lzy;
}nd[4*N];
void upd(int p,int x) {
nd[p].val=max(nd[p].val,nd[p].mx+x);
nd[p].lzy=max(nd[p].lzy,x);
}
void push(int p) {
upd(p*2,nd[p].lzy);
upd(p*2+1,nd[p].lzy);
nd[p].lzy=-inf;
}
void build(int p,int l,int r) {
nd[p].val=nd[p].mx=nd[p].lzy=-inf;
if (l==r) return;
int mid=(l+r)/2;
build(p*2,l,mid);
build(p*2+1,mid+1,r);
}
void modify(int p,int l,int r,int tl,int x) {
push(p);
if (l==r) {
nd[p].mx=x;
return;
}
int mid=(l+r)/2;
if (tl<=mid) modify(p*2,l,mid,tl,x);
else modify(p*2+1,mid+1,r,tl,x);
nd[p].mx=max(nd[p*2].mx,nd[p*2+1].mx);
}
void update(int p,int l,int r,int tl,int tr,int x) {
if (tl>tr||l>r||l>tr||r<tl) return;
if (tl<=l&&r<=tr) {
upd(p,x);
push(p);
return;
}
push(p);
int mid=(l+r)/2;
update(p*2,l,mid,tl,tr,x);
update(p*2+1,mid+1,r,tl,tr,x);
nd[p].val=max(nd[p*2].val,nd[p*2+1].val);
}
int query(int p,int l,int r,int tl,int tr) {
if (tl>tr||l>r||l>tr||r<tl) return -inf;
if (tl<=l&&r<=tr) return nd[p].val;
int mid=(l+r)/2;
return max(query(p*2,l,mid,tl,tr),query(p*2+1,mid+1,r,tl,tr));
}
void solve() {
rep(i,1,n+1) {
Qs[i][0].clear();
Qs[i][1].clear();
}
rep(i,1,n+1) {
Qs[min(n+1,i+a[i])][0].pb(mp(i,0));
Qs[min(n+1,i+b[i])][0].pb(mp(i,1));
}
rep(i,1,q+1) Qs[qr[i]][1].pb(mp(i,ql[i]));
build(1,1,n);
rep(i,1,n+1) {
for (auto qs:Qs[i][0]) if (qs.se==0) modify(1,1,n,qs.fi,h[qs.fi]);
update(1,1,n,i-b[i],i-a[i],-h[i]);
for (auto qs:Qs[i][1]) ans[qs.fi]=max(ans[qs.fi],query(1,1,n,qs.se,i));
for (auto qs:Qs[i][0]) if (qs.se==1) modify(1,1,n,qs.fi,-inf);
}
}
int main() {
scanf("%d",&n);
rep(i,1,n+1) scanf("%d%d%d",&h[i],&a[i],&b[i]);
scanf("%d",&q);
rep(i,1,q+1) scanf("%d%d",&ql[i],&qr[i]),ans[i]=-1;
solve();
rep(i,1,n+1) h[i]=-h[i];
solve();
rep(i,1,q+1) printf("%d\n",ans[i]);
return 0;
}
Compilation message
antennas.cpp: In function 'int main()':
antennas.cpp:98:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
98 | scanf("%d",&n);
| ~~~~~^~~~~~~~~
antennas.cpp:99:20: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
99 | rep(i,1,n+1) scanf("%d%d%d",&h[i],&a[i],&b[i]);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
antennas.cpp:100:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
100 | scanf("%d",&q);
| ~~~~~^~~~~~~~~
antennas.cpp:101:20: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
101 | rep(i,1,q+1) scanf("%d%d",&ql[i],&qr[i]),ans[i]=-1;
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
9684 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
9684 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
331 ms |
52704 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
9684 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
