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cp-study
codeforces-study
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CF_1019A.cpp
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CF_1019A.cpp
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#include<bits/stdc++.h>
#define N 100000
#define ll long long
using namespace std;
int n,m;
vector<int> a[N+5];
inline ll check(ll u){
ll ans = 0;
int tot = a[0].size();//a[0]의 사이즈는 1번당의 현재 득표수
vector<ll> nti;
for(int i = 1;i<=N;++i){
int j = 0,k = a[i].size();//j는 0부터 k는 i번째 당의 득표수를 의미함
while(k>=u) ans += a[i][j++],--k,++tot;
//k를 u까지 끌어내리면서 j는 증가시키고 i번당의 j번째 표를 사고 (코스트 증가)
//득표수를 상승시킨다
while(j<a[i].size()) nti.push_back(a[i][j++]);
//j가 i번 당의 득표수를 따라 잡을때 까지 nti에 i번당의 j번 표값 즉 나머지 비싼 표를 집어넣는다
}
sort(nti.begin(),nti.end());
//나머지 표들의 모음을 또 정렬하고
for(int i = 0;i<nti.size();++i){
if(tot>=u) break;
//현 득표수가 목표득표수를 따라오면 종료
ans += nti[i],++tot;
//조건을 만족할때까지 cost를 증가시키면서 nti에서 표를 가져온다.
}
return ans;
}
int main(){
scanf("%d%d",&n,&m);
int u,v;
for(int i = 1;i<=n;++i){
scanf("%d%d",&u,&v);//party와 cost입력 1번은 cost를 0으로 취급
if(u == 1) v = 0;
a[u].push_back(v);
}
for(int i = 1;i<=N;++i) sort(a[i].begin(),a[i].end());//모든 party에 대해 cost 오름차순 정렬
ll l = 1,r = n;
while(l<=r){//check 함수에대해 이분탐색을 수행 1~n범위내로
int mid = (l+r)/2;
if(check(mid) < check(mid+1)) r = mid-1;
else l = mid+1;
}
printf("%lld",check(l));
return 0;
}
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