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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#796156 | #9520. Concave Hull | XiaoretaW | RE | 0ms | 0kb | C++20 | 1.7kb | 2024-12-01 13:28:13 | 2024-12-01 13:28:13 |
answer
#include <bits/stdc++.h>
using namespace std;
#define int long long
struct node{
int pos,id;
}b[100010];
int a[100010],now[100010];
int n,m;
bool cmp(node x,node y){
return x.pos<y.pos;
}
void solve(){
cin>>n>>m;
set<pair<int,int>> q;
set<int> p[n+10];
vector<int> cnt(n+10,0);
for(int i=1;i<=n;i++){
cin>>a[i];
now[i]=a[i];
}
for(int i=1;i<=m;i++){
cin>>b[i].pos>>b[i].id;
p[b[i].id].insert(b[i].pos);
}
sort(b+1,b+1+m,cmp);
for(int i=1;i<=m;i++){
if(!cnt[b[i].id]) {
q.insert({b[i].pos,b[i].id});
}
cnt[b[i].id]++;
}
int sum=0;
for(int i=1;i<=n;i++){
if(cnt[i]==0){
sum+=a[i];
}
}
int ans=0;
for(int i=1;i<=m;i++){
if(!q.size()){
int cha=b[i].pos-ans;
ans+=min(sum,cha);
sum=max(0ll,sum-cha);
}
vector<pair<int,int>> del;
for(auto [x,y]:q){
int cha=b[i].pos-ans;
ans+=min(now[y],cha);
now[y]=max(0ll,now[y]-cha);
if(now[y]==0ll){
del.push_back({x,y});
}
if(ans>=b[i].pos){
break;
}
}
for(auto [x,y]:del){
q.erase({x,y});
}
if(ans<b[i].pos){
int cha=b[i].pos-ans;
ans+=min(sum,cha);
sum=max(0ll,sum-cha);
}
if(ans>=b[i].pos){
now[b[i].id]=a[b[i].id];
cnt[b[i].id]--;
if(cnt[b[i].id]==0ll) {
sum+=now[b[i].id];
}
else{
auto it=p[b[i].id].upper_bound(ans);
if(it==p[b[i].id].end()){
continue;
}else{
int index=*it;
q.insert({index,b[i].id});
}
}
}
else{
break;
}
}
cout<<ans+sum<<'\n';
}
signed main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
int T=1;
cin>>T;
while(T--) solve();
return 0;
}
Details
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Test #1:
score: 0
Runtime Error
input:
2 6 -2 0 1 -2 5 2 0 4 1 2 3 1 4 0 0 1 0 0 1 1 1