Submission #118197

#	Time	Username	Problem	Language	Result	Execution time	Memory
118197		baluteshih	Fish (IOI08_fish)	C++14	49 / 100	2619 ms	65536 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;

ll MOD;
pll fish[500005];
vector<ll> pl[500005];
bitset<500005> vis;
ll cnt[500005],rec[3000][3000];

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

Compilation message (stderr)

fish.cpp: In function 'int main()':
fish.cpp:48:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    while(t<v.size()&&v[t].F<=num)
          ~^~~~~~~~~
fish.cpp:52:17: 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]*2<=fish[i].F;++j)
                ~^~~~~~~~~~~~~~~~~~~~~
fish.cpp:55:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while(t<v.size()&&v[t].F<=num)
           ~^~~~~~~~~

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