이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#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 tree[800010], h[800010], lazy[800010];
void init(){
for(int i=1; i<800000; i++){
tree[i]=lazy[i]=-llinf;
h[i]=llinf;
}
}
void propogate(int point){
lazy[point*2]=max(lazy[point], lazy[point*2]);
lazy[point*2+1]=max(lazy[point], lazy[point*2+1]);
tree[point*2]=max(tree[point*2], lazy[point*2]-h[point*2]);
tree[point*2+1]=max(tree[point*2+1], lazy[point*2+1]-h[point*2+1]);
lazy[point]=-llinf;
}
void update(int point, int s, int e, int num, LL qu){
if(s==e){
h[point]=qu;
lazy[point]=-llinf;
return;
}
propogate(point);
int mid=(s+e)/2;
if(num<=mid)update(point*2, s, mid, num, qu);
else update(point*2+1, mid+1, e, num, qu);
tree[point]=max(tree[point*2], tree[point*2+1]);
h[point]=min(h[point*2], h[point*2+1]);
}
void alter(int point, int s, int e, int a, int b, LL qu){
if(e<a||s>b)return;
if(a<=s&&e<=b){
lazy[point]=max(lazy[point], qu);
tree[point]=max(tree[point], qu-h[point]);
return;
}
int mid=(s+e)/2;
propogate(point);
alter(point*2, s, mid, a, b, qu);
alter(point*2+1, mid+1, e, a, b, qu);
tree[point]=max(tree[point*2], tree[point*2+1]);
}
LL query(int point, int s, int e, int a, int b){
if(e<a||s>b)return -llinf;
if(a<=s&&e<=b)return tree[point];
propogate(point);
int mid=(s+e)/2;
return max(query(point*2, s, mid, a, b), query(point*2+1, mid+1, e, a, b));
}
}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=min(i+range[i].F, n+1);
int t2=min(i+range[i].S, n)+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]){
//printf("query %d : %lld\n", j.S, seg.query(1, 1, n, j.F, i));
ans[j.S]=max(ans[j.S], seg.query(1, 1, n, j.F, i));
}
}
}
int main(){
scanf("%d", &n);
for(int i=1; i<=n; i++){
scanf("%lld %d %d", &h[i], &range[i].F, &range[i].S);
}
scanf("%d", &q);
for(int i=1; i<=q; i++){
scanf("%d %d", &query[i].F, &query[i].S);
ans[i]=-1;
}
solve();
for(int i=1; i<=n; i++)h[i]=1000000000-h[i];
solve();
for(int i=1; i<=q; i++)printf("%lld\n", ans[i]);
}
컴파일 시 표준 에러 (stderr) 메시지
antennas.cpp: In function 'int main()':
antennas.cpp:102:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &n);
~~~~~^~~~~~~~~~
antennas.cpp:104:14: 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:106:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &q);
~~~~~^~~~~~~~~~
antennas.cpp:108:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &query[i].F, &query[i].S);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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