이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
#define ll int
#define f first
#define s second
#define pb push_back
#define mp make_pair
using namespace std;
ll n,k,a[200005],s,las;
set<pair<ll,ll> >st;
vector<vector<ll> >ans;
vector<ll>g;
int main(){
ios::sync_with_stdio(false);
cin >> n >> k;
bool ok = 1;
for(int i=1; i<=n; i++){
cin >> a[i];
if(a[i] != a[1])ok = 0;
s += a[i];
st.insert(mp(-a[i] , i));
}
/*
if(ok){
ll m = n , ind = 1;
while(m - k >= k){
m -= k;
g.clear();
g.pb(a[ind]);
for(int i=ind; i<ind + k; i++){
g.pb(i);
a[i] = 0;
}
ind += k;
ans.pb(g);
}
st.clear();
s = 0;
for(int i=1; i<=n; i++){
s += a[i];
if(a[i])
st.insert(mp(-a[i] , i));
}
}
*/
if(s % k){
cout << "-1";
return 0;
}
ll raod = s / k;
ll sum = s;
while(sum){
if((int)st.size() < k){
cout << "-1";
return 0;
}
ll p = 0,cur = 0;
g.clear();
ll maxi = -(*st.begin()).f;
for(set<pair<ll,ll> >::iterator it = st.begin(); it != st.end(); it++){
p++;
if(p > k){
cur = (*it).s;
break;
}
las = (*it).s;
}
ll l = 1 , r = a[las] , mid , can = 1;
while(r >= l){
mid = (l + r) / 2;
if(max(maxi - mid , a[cur]) * k <= sum - mid * k){
l = mid + 1;
can = mid;
}
else {
r = mid - 1;
}
}
sum -= can * k;
p = 0;
g.pb(can);
for(set<pair<ll,ll> >::iterator it = st.begin(); it != st.end(); it++){
p++;
if(p > k){
cur = (*it).s;
break;
}
g.pb((*it).s);
}
for(int i=1; i<g.size(); i++){
st.erase(mp(-a[g[i]] , g[i]));
a[g[i]]-=can;
if(a[g[i]])st.insert(mp(-a[g[i]] , g[i]));
}
ans.pb(g);
}
cout << (int)ans.size() << endl;
for(int i=0; i<ans.size(); i++){
for(int j=0; j<ans[i].size(); j++)
cout << ans[i][j] << " ";
cout << '\n';
}
return 0;
}
컴파일 시 표준 에러 (stderr) 메시지
nicegift.cpp: In function 'int main()':
nicegift.cpp:91:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=1; i<g.size(); i++){
~^~~~~~~~~
nicegift.cpp:101:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0; i<ans.size(); i++){
~^~~~~~~~~~~
nicegift.cpp:102:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=0; j<ans[i].size(); j++)
~^~~~~~~~~~~~~~
nicegift.cpp:15:10: warning: variable 'ok' set but not used [-Wunused-but-set-variable]
bool ok = 1;
^~
nicegift.cpp:51:8: warning: unused variable 'raod' [-Wunused-variable]
ll raod = s / k;
^~~~
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