My UltiSnips for C++

cpp.snippets

snippet atcoder "Template for AtCoder" b
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

int main() {
	$1
	return 0;
}
endsnippet

global !p

_type_table = {
	'i': 'int',
	'f': 'float',
	'l': 'll',
	'c': 'char',
	's': 'string'
}
def add_decl(snip, is_vec, typech, namech, lench):
	if is_vec:
		if lench != '':
			snip.expand_anon('vector<{}> {}({});\n'.format(_type_table[typech], namech, lench))
			snip.expand_anon("for (ll j=0; j < {}; ++j) cin >> {}[j];\n".format(lench, namech))
		else:
			snip.expand_anon('vector<{}> {};\n'.format(_type_table[typech], namech))
	else:
		snip.expand_anon('{} {}; cin >> {};\n'.format(_type_table[typech], namech, namech))

def create_character_variables(snip):
	pat = snip.buffer[snip.line].strip()

	snip.buffer[snip.line] = ""
	is_vec = False
	typech = ''
	namech = ''
	lench = ''
	cpos = 0
	for idx, ch in enumerate(pat):
		if ch == '-':
			if idx != 0:
				add_decl(snip, is_vec, typech, namech, lench)
			is_vec = False
			typech = ''
			namech = ''
			lench = ''
			cpos = 0
			continue
		else:
			if cpos == 0:
				if ch == 'v':
					is_vec = True
				else:
					typech = ch
			elif cpos == 1:
				if is_vec:
					typech = ch
				else:
					namech = ch
			elif cpos == 2 and is_vec:
				namech = ch
			elif cpos == 3 and is_vec:
				lench = ch
			cpos += 1
	add_decl(snip, is_vec, typech, namech, lench)
endglobal

post_jump "create_character_variables(snip)"
snippet "cin((-v?[iflcs][a-zA-Z][a-zA-Z0-9]?)+)" "variables from stdin" br
`!p snip.rv = match.group(1)`
endsnippet

snippet for "for (0..N)" b
for (${1:int} j; j < ${2:N}; ++j) {
	$3
}
endsnippet

snippet foreach "for (x in X)" b
for (${1:int} x: ${2:X}) {
	$3
}
endsnippet

snippet yorn "Output Yes or No" b
cout << (${1:flag} ? "Yes" : "No") << endl;
endsnippet

snippet Yorn "Output YES or NO" b
cout << (${1:flag} ? "YES" : "NO") << endl;
endsnippet