제출 #204302

#제출 시각아이디문제언어결과실행 시간메모리
204302Segtree팀들 (IOI15_teams)C++14
34 / 100
4080 ms72408 KiB
#include"teams.h" #include<iostream> #include<algorithm> #include<vector> #include<queue> #include<unordered_set> using namespace std; typedef long long ll; typedef pair<ll,ll> P; #define chmin(a,b) a=min(a,b) #define chmax(a,b) a=max(a,b) #define all(x) x.begin(),x.end() #define rep(i,n) for(int i=0;i<n;i++) #define mod 1000000007 #define mad(a,b) a=(a+b)%mod #define up(x,y) upper_bound(all(x),y) #define NS 100010 vector<P> v; ll dat[NS*2],laste[2*NS],lastd[2*NS],correctA; vector<ll> as[NS*2]; unordered_set<ll> used; void add(int K){ correctA=K; } ll eval(ll k){ if(k==0)return 0; used.insert(k); if(k<NS){ chmax(lastd[k*2],lastd[k]); used.insert(k*2); chmax(lastd[k*2+1],lastd[k]); used.insert(k*2+1); } if(lastd[k]==-1e17){ dat[k]+=up(as[k],correctA)-up(as[k],laste[k]); } else{ dat[k]=up(as[k],correctA)-up(as[k],lastd[k]); } laste[k]=correctA; lastd[k]=-1e17; return dat[k]; } void erase(ll l,ll r){ l+=NS,r+=NS+1; for(ll d=20;~d;d--){ eval(l>>d); eval(r>>d); } for(ll a=l,b=r;a<b;a>>=1,b>>=1){ if(a&1){chmax(lastd[a],correctA);a++;} if(b&1){b--;chmax(lastd[b],correctA);} } for(ll a=l,b=r;a+b;a>>=1,b>>=1){ dat[a/2]=eval(a)+eval(a^1); dat[b/2]=eval(b)+eval(b^1); } } int sum(ll l,ll r){ l+=NS,r+=NS+1; ll res=0; for(ll d=20;~d;d--){ eval(l>>d); eval(r>>d); } for(ll a=l,b=r;a<b;a>>=1,b>>=1){ if(a&1){res+=eval(a);a++;} if(b&1){b--;res+=eval(b);} } return res; } void init(int N,int A[],int B[]){ rep(i,N)v.push_back(make_pair(B[i],A[i])); sort(v.begin(),v.end()); rep(i,NS){ if(i<N)as[i+NS].push_back(v[i].second); } for(int i=NS-1;i>0;i--){ for(auto t:as[i*2])as[i].push_back(t); for(auto t:as[i*2+1])as[i].push_back(t); sort(as[i].begin(),as[i].end()); } } int can(int M,int K[]){ used.clear(); correctA=0; sort(K,K+M); bool ans=1; rep(i,M){ add(K[i]); ll l,r,mid; l=-1,r=v.size(); while(l<r-1){ mid=(l+r)>>1; (v[mid].first<K[i]?l:r)=mid; } //cerr<<"##"<<sum(0,v.size()-1)<<endl; erase(0,l);//cerr<<"$"<<l<<endl; l=-1,r=v.size(); //cerr<<"#"<<sum(0,v.size()-1)<<endl; while(l<r-1){ mid=(l+r)>>1; (sum(0,mid)>=K[i]?r:l)=mid; } if(r==v.size()){ ans=0; break; } erase(0,r); } for(auto i:used)dat[i]=0,laste[i]=lastd[i]=-1e17; return ans; } /* int main(){ int n,a[110],b[110]; cin>>n; rep(i,n)cin>>a[i]>>b[i]; init(n,a,b); while(1){ int m,k[110]; cin>>m; rep(i,m)cin>>k[i]; cout<<(can(m,k)?"YES":"NO")<<endl; } }*/

컴파일 시 표준 에러 (stderr) 메시지

teams.cpp: In function 'll eval(ll)':
teams.cpp:33:12: warning: conversion to 'double' from 'll {aka long long int}' may alter its value [-Wconversion]
  if(lastd[k]==-1e17){
     ~~~~~~~^
teams.cpp: In function 'int sum(ll, ll)':
teams.cpp:69:9: warning: conversion to 'int' from 'll {aka long long int}' may alter its value [-Wconversion]
  return res;
         ^~~
teams.cpp: In function 'int can(int, int*)':
teams.cpp:106:7: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(r==v.size()){
      ~^~~~~~~~~~
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