제출 #118241

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
118241		baluteshih	Fish (IOI08_fish)	C++14	63 / 100	3050 ms	39160 KiB

fish

#include <bits/stdc++.h>
#define jizz ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define pb push_back
#define ET cout << "\n"
#define MEM(i,j) memset(i,j,sizeof i)
#define F first
#define S second
#define MP make_pair
#define ALL(v) v.begin(),v.end()
#define DB(a,s,e) {for(int i=s;i<e;++i) cout << a[i] << " ";ET;}
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

const ll INF=1e9;
ll MOD;
pll fish[500005];
vector<pll> pl[500005];
bitset<500005> vis;
ll cnt[500005];

int main()
{jizz
	ll n,k,ans=0,tmp,num;
	cin >> n >> k >> MOD;
	for(int i=0;i<n;++i)
		cin >> fish[i].F >> fish[i].S;
	sort(fish,fish+n);
	for(int i=0;i<n;++i)
		pl[fish[i].S].pb(MP(fish[i].F,1));
	for(int i=n-1;i>=0;--i)
		if(!vis[fish[i].S])
		{
			vector<pll> v;
			vis[fish[i].S]=1,tmp=1;
			for(int j=1;j<=k;++j)
				cnt[j]=0;
			for(int j=0;j<n&&fish[j].F*2<=fish[i].F;++j)
				++cnt[fish[j].S];
			for(int j=1;j<=k;++j)
				if(!vis[j])
				{
					tmp=tmp*(cnt[j]+1)%MOD;
					if(cnt[j]==0) pl[j].back().S=pl[j].back().S*(upper_bound(ALL(pl[fish[i].S]),MP(pl[j].back().F/2,INF))-pl[fish[i].S].begin()+1)%MOD;
					else if(cnt[j]<pl[j].size())
						pl[j][cnt[j]-1].S=pl[j][cnt[j]-1].S*(upper_bound(ALL(pl[fish[i].S]),MP(pl[j].back().F/2,INF))-pl[fish[i].S].begin()+1)%MOD;
				}
			num=1,tmp=tmp*pl[fish[i].S].back().S%MOD;
			ans=(ans+tmp)%MOD;
			for(int j=0;j<pl[fish[i].S].size()&&pl[fish[i].S][j].F*2<=fish[i].F;++j)
				tmp=tmp*pl[fish[i].S][j].S%MOD,ans=(ans+tmp)%MOD;
		}
	cout << ans << "\n";
}

컴파일 시 표준 에러 (stderr) 메시지

fish.cpp: In function 'int main()':
fish.cpp:46:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      else if(cnt[j]<pl[j].size())
              ~~~~~~^~~~~~~~~~~~~
fish.cpp:51:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int j=0;j<pl[fish[i].S].size()&&pl[fish[i].S][j].F*2<=fish[i].F;++j)
                ~^~~~~~~~~~~~~~~~~~~~~
fish.cpp:25:19: warning: variable 'num' set but not used [-Wunused-but-set-variable]
  ll n,k,ans=0,tmp,num;
                   ^~~

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