#include <bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define vi vector<int>
#define vl vector<ll>
#define mp make_pair
#define pb push_back
using namespace std;
int n, q;
vector<pii> arr;
int parent[100000], water[100000];
int main(){
cin>>n>>q;
bool sorted = true;
for(int i = 0; i < n; i++){
int a, b;
cin>>a>>b;
if(i > 0 && arr[arr.size() - 1].first < a)
sorted = false;
arr.pb(mp(a,b));
water[i] = b;
}
if(sorted){
vi pref;
pref.pb(water[0]);
for(int i = 1; i < n; i++)
pref.pb(water[i] + pref[i - 1]);
while(q--){
int at, vol;
cin>>at>>vol;
at--;
int l = 0, r = n - 1, mid;
while(l <= r){
mid = (l + r) / 2;
if(water[mid] < vol)
l = mid + 1;
else
r = mid - 1;
}
cout<<l<<" "<<mid+1<<endl;
}
return 0;
}
for(int i = 0; i < n; i++){
bool f = false;
for(int j = i + 1; j < n; j++){
if(arr[i].first < arr[j].first)
{
f = true;
parent[i] = j;
break;
}
else
continue;
}
if(!f)
parent[i] = n;
//cout<<"the parent of "<<i<<" is "<<parent[i]<<endl;
}
while(q--){
int at, vol;
cin>>at>>vol;
at--;
if(vol <= water[at])
{
cout<<at + 1<<endl;
continue;
}
while(vol > 0){
if(at == n){
cout<<0<<endl;
break;
}
if(vol - water[at] <= 0){
cout<<at + 1<<endl;
break;
}
vol -= water[at];
at = parent[at];
}
}
}
Compilation message
fountain.cpp: In function 'int main()':
fountain.cpp:41:22: warning: 'mid' may be used uninitialized in this function [-Wmaybe-uninitialized]
41 | cout<<l<<" "<<mid+1<<endl;
| ^
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
3 ms |
364 KB |
Output is correct |
3 |
Correct |
4 ms |
364 KB |
Output is correct |
4 |
Correct |
6 ms |
364 KB |
Output is correct |
5 |
Correct |
11 ms |
492 KB |
Output is correct |
6 |
Correct |
8 ms |
364 KB |
Output is correct |
7 |
Correct |
7 ms |
364 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1589 ms |
2344 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
3 ms |
364 KB |
Output is correct |
3 |
Correct |
4 ms |
364 KB |
Output is correct |
4 |
Correct |
6 ms |
364 KB |
Output is correct |
5 |
Correct |
11 ms |
492 KB |
Output is correct |
6 |
Correct |
8 ms |
364 KB |
Output is correct |
7 |
Correct |
7 ms |
364 KB |
Output is correct |
8 |
Execution timed out |
1589 ms |
2344 KB |
Time limit exceeded |
9 |
Halted |
0 ms |
0 KB |
- |