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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#798417 | #8790. First Billion | q1w2e3r4# | WA | 5ms | 4360kb | C++14 | 1.6kb | 2024-12-04 13:33:22 | 2024-12-04 13:33:29 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
int n;
int a[105];
vector<int> v[405];
const int SZ = 300;
void build(int id, int l, int r){
if(l == r){
v[id].push_back(a[l]);
v[id].push_back(0);
return;
}
int mid = l + r >> 1;
build(id*2, l, mid);
build(id*2+1, mid+1, r);
vector<int> tmp;
for(int x: v[id*2]){
for(int y: v[id*2+1]){
tmp.push_back(x+y);
}
}
sort(tmp.begin(), tmp.end());
if(tmp.size() >= SZ){
int n = tmp.size();
int l = n/2 - SZ/2, r = n/2 + SZ/2 - 1;
for(int i=l;i<=r;i++){
v[id].push_back(tmp[i]);
}
}
else{
v[id] = tmp;
}
}
void query(int id, int l, int r, int target, vector<int>& ans){
// cout << "query " << l << " " << r << " " << target << endl;
if(l == r){
if(target == a[l]) ans.push_back(l);
assert(target == 0 || target == a[l]);
return;
}
int mid = l + r >> 1;
for(auto x: v[id*2]){
for(int y: v[id*2+1]){
if(x + y == target){
query(id*2, l, mid, x, ans);
query(id*2+1, mid+1, r, y, ans);
return;
}
}
}
}
signed main(){
cin >> n;
for(int i=1;i<=n;i++) cin >> a[i];
build(1,1,n);
bool ok = false;
for(auto x: v[1]){
// cout << x << " ";
if(x == 1e9) ok = true;
}
// assert(ok);
vector<int> ans;
query(1,1,n,(int)1e9,ans);
cout << ans.size();
for(int x: ans){
cout << " " << x;
}
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3588kb
input:
10 386413329 88494216 245947398 316438989 192751270 204627269 65749456 3938400 150458676 345180997
output:
5 1 5 6 7 9
result:
ok OK (n = 10)
Test #2:
score: 0
Accepted
time: 0ms
memory: 3884kb
input:
10 119486233 299942886 169540407 349937991 597883752 32230162 140514533 57341098 12602102 220520836
output:
5 1 3 4 7 10
result:
ok OK (n = 10)
Test #3:
score: 0
Accepted
time: 1ms
memory: 3764kb
input:
14 384615281 84612238 83310504 54746763 142296081 56775470 128760350 343006424 177232390 214368720 67220468 21895072 16352717 224807522
output:
7 2 3 4 5 8 11 14
result:
ok OK (n = 14)
Test #4:
score: 0
Accepted
time: 1ms
memory: 3736kb
input:
14 270208635 14270307 89661499 113578022 47687195 101043954 38775146 208193324 650676076 351701957 3427619 59535626 24230888 27009752
output:
7 5 7 8 9 11 13 14
result:
ok OK (n = 14)
Test #5:
score: -100
Wrong Answer
time: 5ms
memory: 4360kb
input:
20 61638928 106712373 5946815 178135484 4937573 111395400 15504655 67139983 101814514 312223647 130341028 43244171 37671364 54108486 337181317 37924824 153793862 70383750 102917244 66984582
output:
0
result:
wrong answer need sum 1000000000, got sum 0