Submission #96597

#	Time	Username	Problem	Language	Result	Execution time	Memory
96597		psmao	Parametriziran (COCI19_parametriziran)	C++14	11 / 110	12 ms	3704 KiB

Main

#include <bits/stdc++.h>
using namespace std;

#define fo(i,s,t) for(int i = s; i <= t; ++ i)
#define fd(i,s,t) for(int i = s; i >= t; -- i)
#define bf(i,s) for(int i = head[s]; i; i = e[i].next)
#define mp make_pair
#define fi first
#define se second
#define pii pair<int,int>
#define pb push_back
#define VI vector<int>
#define sf scanf
#define pf printf
#define fp freopen
#define SZ(x) ((int)(x).size())
#ifdef MPS
#define D(x...) printf(x)
#else
#define D(x...)
#endif
typedef long long ll;
typedef double db;
typedef unsigned long long ull;
const int inf = 1<<30;
const ll INF = 1ll<<60;
const db Inf = 1e20;
const db eps = 1e-9;

void gmax(int &a,int b){a = (a > b ? a : b);}
void gmin(int &a,int b){a = (a < b ? a : b);}

const int maxn = 50005;

map<string,int> cnt;
int lastx[27], firx[27], last[27], fir[27];
int n, m;
ll ans;
string s[maxn];

int main()
{
	#ifdef MPS	
		fp("1.in","r",stdin);
		fp("1.out","w",stdout);
	#endif
	cin.sync_with_stdio(false);
	cin >> n >> m;
	fo(i,1,n) cin >> s[i];
	if(m == 1)
	{
		int num = 0;
		fo(i,1,n)
		{
			if(s[i] == "?") ++ num;
			else cnt[s[i]] ++; 
		}
		fo(i,1,n) 
			if(s[i] != "?") ans += cnt[s[i]] - 1 + num;
			else ans += n - 1;
		ans /= 2;
		cout << ans << endl;
	}
	else if(m == 2)
	{
		int num = 0, a = 0, b = 0;
		fo(i,1,n)
		{
			if(s[i] == "??") ++ num;
			else if(s[i][0] == '?') {lastx[s[i][1]-'a'+1] ++; ++ a;}
			else if(s[i][1] == '?') {firx[s[i][0]-'a'+1] ++; ++ b;}
			else {last[s[i][1]-'a'+1] ++; fir[s[i][0]-'a'+1] ++; cnt[s[i]] ++;}
		}
		fo(i,1,n)
		{
			if(s[i] == "??") ans += n-1;
			else if(s[i][0] == '?') ans += b+last[s[i][1]-'a'+1]+num;
			else if(s[i][1] == '?') ans += a+fir[s[i][0]-'a'+1]+num;
			else ans += cnt[s[i]]-1+firx[s[i][0]-'a'+1]+lastx[s[i][1]-'a'+1]+num;
		}
		cout << ans/2 << endl;
	}else assert(0);
	return 0;
}

• Subtask 1: 11 / 11
• Subtask 2: 0 / 11
• Subtask 3: 0 / 11
• Subtask 4: 0 / 11
• Subtask 5: 0 / 11
• Subtask 6: 0 / 11
• Subtask 7: 0 / 11
• Subtask 8: 0 / 11
• Subtask 9: 0 / 11
• Subtask 10: 0 / 11