#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define sortvec(x) sort(all(x))
#define compress(x) x.erase(unique(all(x)), x.end())
using namespace std;
typedef long long LL;
typedef pair<int, int> pii;
typedef pair<LL, LL> pll;
typedef pair<int, LL> pil;
typedef pair<LL, int> pli;
const LL llinf=987654321987654321;
const int inf=2000000000;
struct SEGMENT_TREE{
LL x[800010], c[800010], lazy[800010];
void init(){
for(int i=1; i<800000; i++){
x[i]=lazy[i]=-llinf;
c[i]=llinf;
}
}
void propogate(int num){
x[num*2]=max(x[num*2], lazy[num]-c[num*2]);
lazy[num*2]=max(lazy[num*2], lazy[num]);
x[num*2+1]=max(x[num*2+1], lazy[num]-c[num*2+1]);
lazy[num*2+1]=max(lazy[num*2+1], lazy[num]);
x[num]=max(x[num], max(x[num*2], x[num*2+1]));
lazy[num]=-llinf;
}
void update(int num, int s, int e, int m, LL qu){
if(s==e){
c[num]=qu;
return;
}
propogate(num);
int mid=(s+e)/2;
if(m<=mid)update(num*2, s, mid, m, qu);
else update(num*2+1, mid+1, e, m, qu);
c[num]=min(c[num*2], c[num*2+1]);
x[num]=max(x[num*2], x[num*2+1]);
}
void alter(int num, int s, int e, int a, int b, LL qu){
if(s!=e)propogate(num);
if(e<a||s>b)return;
if(a<=s&&e<=b){
lazy[num]=max(lazy[num], qu);
x[num]=max(x[num], lazy[num]-c[num]);
return;
}
int mid=(s+e)/2;
alter(num*2, s, mid, a, b, qu);
alter(num*2+1, mid+1, e, a, b, qu);
c[num]=min(c[num*2], c[num*2+1]);
x[num]=max(x[num*2], x[num*2+1]);
}
LL query(int num, int s, int e, int a, int b){
if(e<a||s>b)return -llinf;
if(a<=s&&e<=b)return x[num];
propogate(num);
int mid=(s+e)/2;
LL ans=max(query(num*2, s, mid, a, b), query(num*2+1, mid+1, e, a, b));
c[num]=min(c[num*2], c[num*2+1]);
x[num]=max(x[num*2], x[num*2+1]);
return ans;
}
}seg;
int n, q;
pii range[200010];
pii query[200010];
LL ans[200010], h[200010];
vector<pii> qu[200010], upd[200010];
void solve(){
for(int i=1; i<=n; i++){
qu[i].clear();
upd[i].clear();
}
seg.init();
for(int i=1; i<=n; i++){
int t1=i+range[i].F;
int t2=min(n, i+range[i].S)+1;
upd[t1].pb(mp(i, 1));
upd[t2].pb(mp(i, 0));
}
for(int i=1; i<=q; i++)qu[query[i].S].pb(mp(query[i].F, i));
for(int i=1; i<=n; i++){
for(auto j:upd[i]){
if(j.S)seg.update(1, 1, n, j.F, h[j.F]);
else seg.update(1, 1, n, j.F, llinf);
}
if(i-range[i].F>=1){
seg.alter(1, 1, n, max(1, i-range[i].S), i-range[i].F, h[i]);
}
for(auto j:qu[i]){
ans[j.S]=max(ans[j.S], seg.query(1, 1, n, j.F, i-1));
}
}
}
int main(){
scanf("%d", &n);
for(int i=1; i<=n; i++){
scanf("%lld %d %d", &h[i], &range[i].F, &range[i].S);
ans[i]=-1;
}
scanf("%d", &q);
for(int i=1; i<=q; i++)scanf("%d %d", &query[i].F, &query[i].S);
solve();
for(int i=1; i<=n; i++)h[i]*=-1;
solve();
for(int i=1; i<=q; i++)printf("%lld\n", ans[i]);
}
Compilation message
antennas.cpp: In function 'int main()':
antennas.cpp:105:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &n);
~~~~~^~~~~~~~~~
antennas.cpp:107:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld %d %d", &h[i], &range[i].F, &range[i].S);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
antennas.cpp:110:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &q);
~~~~~^~~~~~~~~~
antennas.cpp:111:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
for(int i=1; i<=q; i++)scanf("%d %d", &query[i].F, &query[i].S);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
22 ms |
28536 KB |
Output is correct |
| 2 |
Incorrect |
23 ms |
28536 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
22 ms |
28536 KB |
Output is correct |
| 2 |
Incorrect |
23 ms |
28536 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
178 ms |
78436 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
22 ms |
28536 KB |
Output is correct |
| 2 |
Incorrect |
23 ms |
28536 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
