#include<bits/stdc++.h>
using namespace std ;
const int maxn = 1e5 + 5 ;
int n ;
double x[maxn], y[maxn], p_x[maxn], p_y[maxn] ;
bool cmp(double a, double b){ return a >= b ; }
int main(){
scanf("%d",&n) ;
for(int i = 1 ; i <= n ; i++) scanf("%lf%lf", &x[i],&y[i]) ;
sort(x + 1, x + 1 + n, cmp) ; sort(y + 1, y + 1 + n, cmp) ;
for(int i = 1 ; i <= n ; i++) p_x[i] = p_x[i-1] + x[i], p_y[i] = p_y[i-1] + y[i] ;
double ans = 0 ;
for(int i = 1 ; i <= n ; i++){
int ini = 1, fim = n, mid, best = 0 ; double mn = p_x[i] ;
while(ini <= fim){
mid = (ini + fim)>>1 ;
if(abs((p_x[i])-(p_y[mid])) <= mn){
mn = abs((p_x[i])-(p_y[mid])) ;
best = mid ;
}
if(p_x[i] <= p_y[mid]) fim = mid - 1 ;
else ini = mid + 1 ;
}
ans = max(ans, min(p_x[i] - (double)best - (double)i, p_y[best] - (double)i - (double)best)) ;
}
printf("%.4lf\n", ans) ;
}
Compilation message
sure.cpp: In function 'int main()':
sure.cpp:13:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
13 | scanf("%d",&n) ;
| ~~~~~^~~~~~~~~
sure.cpp:15:37: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
15 | for(int i = 1 ; i <= n ; i++) scanf("%lf%lf", &x[i],&y[i]) ;
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
2 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
2 ms |
340 KB |
Output is correct |
| 17 |
Correct |
71 ms |
3404 KB |
Output is correct |
| 18 |
Correct |
71 ms |
3384 KB |
Output is correct |
| 19 |
Correct |
71 ms |
3472 KB |
Output is correct |
| 20 |
Correct |
72 ms |
3508 KB |
Output is correct |
| 21 |
Correct |
75 ms |
3404 KB |
Output is correct |
| 22 |
Correct |
76 ms |
3508 KB |
Output is correct |
| 23 |
Runtime error |
72 ms |
6828 KB |
Execution killed with signal 11 |
| 24 |
Halted |
0 ms |
0 KB |
- |
