#include<stdio.h>
#include<algorithm>
#include<stdlib.h>
#define lb(y) (lower_bound(ys, ys+ycn, y) - ys)
using namespace std;
typedef long long lld;
struct intv {
lld x, yl, yr; int sco;
intv(lld x_=0, lld yl_=0, lld yr_=0, int sco_=0){ x=x_, yl=yl_, yr=yr_, sco=sco_; }
bool operator< (const intv& c) const {
if(x == c.x)return sco < c.sco;
return x<c.x;
}
} ba[404000];
struct iix {
int sum, mx;
iix(int sum_=0, int mx_=0) : sum(sum_), mx(mx_) {}
};
struct segtr {
segtr *l, *r; int s, e;
iix key;
segtr(int s_=0, int e_=0) : s(s_), e(e_) {l=NULL, r=NULL;}
} *itr;
int N, bcn, dap, ycn;
lld L, R, ys[404040];
void add(segtr* it, int mi, int mx, int v){
if(mi > mx)return;
int l = it->s, r = it->e;
int m = (l+r)/2;
if(m == r && l < m)m--;
// printf("%lld %lld %lld / %lld %lld\n", l, m, r, mi, mx);
if(l == -1 && r == -1 && mi == 0)exit(0);
if(l == mi && r == mx){
it->key.sum += v;
it->key.mx += v;
return;
}
if(it->l == NULL)it->l = new segtr(l, m);
if(it->r == NULL)it->r = new segtr(m+1, r);
if(mx <= m) add(it->l, mi, mx, v);
else if(mi > m) add(it->r, mi, mx, v);
else{
add(it->l, mi, m, v);
add(it->r, m+1, mx, v);
}
it->key.mx = max(it->l->key.mx, it->r->key.mx) + it->key.sum;
}
int main(){
itr = new segtr;
itr->s = 0, itr->e = 500000;
scanf("%d %lld %lld", &N, &L, &R); L--;
for(int i=0; i<N; i++){
lld x, y; int s;
scanf("%lld%lld%d", &x, &y, &s);
ba[bcn++] = intv(x-R, y-R, y+R, s);
ba[bcn++] = intv(x-L, y-L, y+L, -s);
ba[bcn++] = intv(x+L+1, y-L, y+L, s);
ba[bcn++] = intv(x+R+1, y-R, y+R, -s);
ys[ycn++] = y-L, ys[ycn++] = y+L;
ys[ycn++] = y-R, ys[ycn++] = y+R;
}
sort(ba, ba+bcn);
sort(ys, ys+ycn); ycn = unique(ys, ys+ycn) - ys;
for(int i=0; i<bcn; i++){
add(itr, lb(ba[i].yl), lb(ba[i].yr), ba[i].sco);
int mx = itr->key.mx;
if(dap < mx)dap = mx;
}
printf("%d", dap);
return 0;
}
Compilation message
DE.cpp: In function 'int main()':
DE.cpp:59:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %lld %lld", &N, &L, &R); L--;
^
DE.cpp:62:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld%lld%d", &x, &y, &s);
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
16956 KB |
Output is correct |
| 2 |
Correct |
0 ms |
16956 KB |
Output is correct |
| 3 |
Correct |
0 ms |
16956 KB |
Output is correct |
| 4 |
Correct |
3 ms |
16956 KB |
Output is correct |
| 5 |
Correct |
3 ms |
16956 KB |
Output is correct |
| 6 |
Correct |
6 ms |
17088 KB |
Output is correct |
| 7 |
Correct |
0 ms |
17088 KB |
Output is correct |
| 8 |
Correct |
3 ms |
17088 KB |
Output is correct |
| 9 |
Correct |
3 ms |
17088 KB |
Output is correct |
| 10 |
Correct |
9 ms |
17088 KB |
Output is correct |
| 11 |
Correct |
6 ms |
17088 KB |
Output is correct |
| 12 |
Correct |
6 ms |
17220 KB |
Output is correct |
| 13 |
Correct |
3 ms |
17088 KB |
Output is correct |
| 14 |
Incorrect |
6 ms |
17088 KB |
Output isn't correct |
| 15 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
16956 KB |
Output is correct |
| 2 |
Correct |
0 ms |
16956 KB |
Output is correct |
| 3 |
Correct |
0 ms |
16956 KB |
Output is correct |
| 4 |
Correct |
3 ms |
16956 KB |
Output is correct |
| 5 |
Correct |
3 ms |
16956 KB |
Output is correct |
| 6 |
Correct |
6 ms |
17088 KB |
Output is correct |
| 7 |
Correct |
0 ms |
17088 KB |
Output is correct |
| 8 |
Correct |
3 ms |
17088 KB |
Output is correct |
| 9 |
Correct |
3 ms |
17088 KB |
Output is correct |
| 10 |
Correct |
9 ms |
17088 KB |
Output is correct |
| 11 |
Correct |
6 ms |
17088 KB |
Output is correct |
| 12 |
Correct |
6 ms |
17220 KB |
Output is correct |
| 13 |
Correct |
3 ms |
17088 KB |
Output is correct |
| 14 |
Incorrect |
6 ms |
17088 KB |
Output isn't correct |
| 15 |
Halted |
0 ms |
0 KB |
- |
