Submission #776524

#TimeUsernameProblemLanguageResultExecution timeMemory
776524jamezzzFish (IOI08_fish)C++17
56 / 100
327 ms65536 KiB
#include <bits/stdc++.h> using namespace std; #define sf scanf #define pf printf #define fi first #define se second #define pb push_back #define sz(x) ((int)x.size()) #define all(x) x.begin(),x.end() #define LINF 1023456789123456789 typedef long long ll; typedef pair<int,int> ii; typedef pair<ll,int> li; #define maxn 500005 #define maxk 10005 int n,k,m,cnt[maxk],bad[maxk],num[maxk][maxk],mn[maxn]; vector<ii> v; int main(){ sf("%d%d%d",&n,&k,&m); for(int i=0;i<n;++i){ int l,c; sf("%d%d",&l,&c); v.pb({l,c}); ++cnt[c]; } sort(all(v)); int ptr=n-1; int ans=0; fill(mn,mn+n+1,1); for(int i=n-1;i>=0;--i){ if(bad[v[i].se])continue; while(ptr>=0&&v[i].fi<2*v[ptr].fi){ --cnt[v[ptr].se]; --ptr; } for(int j=1;j<=k;++j){ if(v[i].se==j)continue; if(num[v[i].se][j]<=cnt[v[i].se]+1){ mn[num[v[i].se][j]+1]*=(cnt[j]+1); mn[num[v[i].se][j]+1]%=m; } } int add=1; for(int j=1;j<=cnt[v[i].se]+1;++j){ add*=mn[j]; add%=m; ans+=add; ans%=m; } for(int j=1;j<=k;++j){ mn[num[v[i].se][j]+1]=1; } for(int j=1;j<=k;++j){ num[j][v[i].se]=cnt[j]; } bad[v[i].se]=1; } pf("%d\n",ans); } /* 5 3 7 2 2 4 1 8 3 4 1 2 3 */

Compilation message (stderr)

fish.cpp: In function 'int main()':
fish.cpp:23:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |  sf("%d%d%d",&n,&k,&m);
      |    ^
fish.cpp:26:5: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |   sf("%d%d",&l,&c);
      |     ^
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