Submission #79225

#	Time	Username	Problem	Language	Result	Execution time	Memory
79225		Plurm	Aliens (IOI07_aliens)	C++11	Compilation error	0 ms	0 KiB

aliens

#include <bits/stdc++.h>
using namespace std;
enum dir{
	up, down, lleft, rright
};
int n;
const pair<int,int> NOPE = make_pair(-1,-1);
map<pair<long long,long long>,bool> mp;
bool query(long long x,long long y){
	if(x <= 0 || y <= 0 || x > n || y > n) return false;
	if(mp.find(make_pair(x,y)) != mp.end()) return mp[make_pair(x,y)];
	printf("examine %lld %lld\n",x,y);
	fflush(stdout);
	char in[8];
	scanf("%s",in);
	mp[make_pair(x,y)] = in[0] == 't';
	return in[0] == 't';
}
pair<long long,long long> search(long long x,long long y,dir d){
	int sstate = 0;
	if(d == up){
		for(long long i = 1; y+i <= (long long)n; i *= 2ll){
			if(query(x,y+i)){
				if(sstate == 1){
					return make_pair(x,y+i);
				}
			}else{
				if(sstate == 0) sstate = 1;
			}
		}
		return NOPE;
	}else if(d == down){
		for(long long i = 1; y-i > 0ll; i *= 2ll){
			if(query(x,y-i)){
				if(sstate == 1){
					return make_pair(x,y-i);
				}
			}else{
				if(sstate == 0) sstate = 1;
			}
		}
		return NOPE;
	}else if(d == lleft){
		for(long long i = 1; x-i > 0ll; i *= 2ll){
			if(query(x-i,y)){
				if(sstate == 1){
					return make_pair(x-i,y);
				}
			}else{
				if(sstate == 0) sstate = 1;
			}
		}
		return NOPE;
	}else{
		for(long long i = 1; x+i <= (long long)n; i *= 2ll){
			if(query(x+i,y)){
				if(sstate == 1){
					return make_pair(x+i,y);
				}
			}else{
				if(sstate == 0) sstate = 1;
			}
		}
		return NOPE;
	}
}
long long getsidelength(long long x,long long y){
	long long byu = -1ll;
	long long byd = -1ll;
	for(long long i = 1; ; i *= 2ll){
		if(!query(x,y+i)){
			long long hi = min(i,n-y);
			long long lo = 0ll;
			long long mid;
			while(lo < hi){
				mid = (lo + hi)/2ll;
				if(query(x,y+mid)){
					lo = mid+1ll;
				}else{
					hi = mid;
				}
			}
			byu = y+lo;
			break;
		}
	}
	for(long long i = 1; ; i *= 2ll){
		if(!query(x,y-i)){
			long long hi = min(i,y);
			long long lo = 0ll;
			long long mid;
			while(lo < hi){
				mid = (lo + hi)/2ll;
				if(query(x,y-mid)){
					lo = mid+1ll;
				}else{
					hi = mid;
				}
			}
			byd = y-lo;
			break;
		}
	}
	return byu - byd - 1ll;
}
int main(){
	scanf("%d",&n);
	long long x0,y0;
	scanf("%lld%lld",&x0,&y0);
	long long m = getsidelength(x0,y0);
	//printf("%lld\n",m);
	auto v0 = search(x0,y0,up);
	auto v1 = search(x0,y0,down);
	auto v2 = search(x0,y0,lleft);
	auto v3 = search(x0,y0,rright);
	int mask = 0;
	if(v0 != NOPE) mask++;
	mask *= 2;
	if(v1 != NOPE) mask++;
	mask *= 2;
	if(v2 != NOPE) mask++;
	mask *= 2;
	if(v3 != NOPE) mask++;
	pair<long long,long long> nxt;
	//printf("DBG %d\n",mask);
	switch(mask){
		case 5:
		nxt = search(v1.first,v1.second,down);
		if(nxt == NOPE){
			nxt.first = x0 + m;
			nxt.second = y0 - m;
		}else{
			nxt.first = v1.first + 2ll*m;
			nxt.second = v1.second;
		}
		break;

		case 6:
		nxt = search(v1.first,v1.second,down);
		if(nxt == NOPE){
			nxt.first = x0 - m;
			nxt.second = y0 - m;
		}else{
			nxt.first = v1.first - 2ll*m;
			nxt.second = v1.second;
		}
		break;

		case 7:
		nxt = v1;
		break;

		case 9:
		nxt = search(v0.first,v0.second,up);
		if(nxt == NOPE){
			nxt.first = x0 + m;
			nxt.second = y0 + m;
		}else{
			nxt.first = v0.first + 2ll*m;
			nxt.second = v0.second;
		}
		break;

		case 10:
		nxt = search(v0.first,v0.second,up);
		if(nxt == NOPE){
			nxt.first = x0 - m;
			nxt.second = y0 + m;
		}else{
			nxt.first = v0.first - 2ll*m;
			nxt.second = v0.second;
		}
		break;

		case 11:
		nxt = v0;
		break;

		case 13:
		nxt = v3;
		break;

		case 14:
		nxt = v2;
		break;

		case 15:
		nxt = make_pair(x0,y0);
		break;
	}
	long long x = nxt.first;
	long long y = nxt.second;
	//printf("DBGDBG %d %d\n",x,y);
	long long lo = 0;
	long long hi = m+1;
	long long mid;
	long long byu = 0;
	long long byd = 0;
	long long bxl = 0;
	long long bxr = 0;
	while(lo < hi){
		mid = (lo + hi)/2ll;
		if(query(x,y+mid)){
			lo = mid+1ll;
		}else{
			hi = mid;
		}
	}
	byu = y+lo;
	lo = 0ll;
	hi = m+1ll;
	while(lo < hi){
		mid = (lo + hi)/2ll;
		if(query(x,y-mid)){
			lo = mid+1ll;
		}else{
			hi = mid;
		}
	}
	byd = y-lo;
	lo = 0ll;
	hi = m+1ll;
	while(lo < hi){
		mid = (lo + hi)/2ll;
		if(query(x-mid,y)){
			lo = mid+1ll;
		}else{
			hi = mid;
		}
	}
	bxl = x-lo;
	lo = 0ll;
	hi = m+1ll;
	while(lo < hi){
		mid = (lo + hi)/2ll;
		if(query(x+mid,y)){
			lo = mid+1ll;
		}else{
			hi = mid;
		}
	}
	bxr = x+lo;
	printf("solution %lld %lld\n",(bxl + bxr)/2ll,(byd + byu)/2ll);
	return 0;
}

Compilation message (stderr)

aliens.cpp: In function 'int main()':
aliens.cpp:117:8: error: no match for 'operator!=' (operand types are 'std::pair<long long int, long long int>' and 'const std::pair<int, int>')
  if(v0 != NOPE) mask++;
     ~~~^~~~~~~
In file included from /usr/include/c++/7/regex:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/regex.h:951:5: note: candidate: template<class _BiIter> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, const std::__cxx11::sub_match<_BiIter>&)
     operator!=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
     ^~~~~~~~
/usr/include/c++/7/bits/regex.h:951:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/regex:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/regex.h:1029:5: note: candidate: template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator!=(std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const std::__cxx11::sub_match<_BiIter>&)
     operator!=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/regex.h:1029:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/regex:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/regex.h:1109:5: note: candidate: template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)
     operator!=(const sub_match<_Bi_iter>& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/regex.h:1109:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/regex:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/regex.h:1186:5: note: candidate: template<class _Bi_iter> bool std::__cxx11::operator!=(const typename std::iterator_traits<_Iter>::value_type*, const std::__cxx11::sub_match<_BiIter>&)
     operator!=(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/regex.h:1186:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'const std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/regex:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/regex.h:1260:5: note: candidate: template<class _Bi_iter> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)
     operator!=(const sub_match<_Bi_iter>& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/regex.h:1260:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/regex:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/regex.h:1337:5: note: candidate: template<class _Bi_iter> bool std::__cxx11::operator!=(const typename std::iterator_traits<_Iter>::value_type&, const std::__cxx11::sub_match<_BiIter>&)
     operator!=(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/regex.h:1337:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'const std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/regex:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/regex.h:1417:5: note: candidate: template<class _Bi_iter> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)
     operator!=(const sub_match<_Bi_iter>& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/regex.h:1417:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/regex:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/regex.h:1944:5: note: candidate: template<class _Bi_iter, class _Alloc> bool std::__cxx11::operator!=(const std::__cxx11::match_results<_BiIter, _Alloc>&, const std::__cxx11::match_results<_BiIter, _Alloc>&)
     operator!=(const match_results<_Bi_iter, _Alloc>& __m1,
     ^~~~~~~~
/usr/include/c++/7/bits/regex.h:1944:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::match_results<_BiIter, _Alloc>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/iosfwd:40:0,
                 from /usr/include/c++/7/ios:38,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/postypes.h:221:5: note: candidate: template<class _StateT> bool std::operator!=(const std::fpos<_StateT>&, const std::fpos<_StateT>&)
     operator!=(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
     ^~~~~~~~
/usr/include/c++/7/bits/postypes.h:221:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::fpos<_StateT>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:64:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/stl_pair.h:456:5: note: candidate: template<class _T1, class _T2> constexpr bool std::operator!=(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&)
     operator!=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
     ^~~~~~~~
/usr/include/c++/7/bits/stl_pair.h:456:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   deduced conflicting types for parameter '_T1' ('long long int' and 'int')
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/stl_iterator.h:311:5: note: candidate: template<class _Iterator> bool std::operator!=(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&)
     operator!=(const reverse_iterator<_Iterator>& __x,
     ^~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:311:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::reverse_iterator<_Iterator>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/stl_iterator.h:349:5: note: candidate: template<class _IteratorL, class _IteratorR> bool std::operator!=(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)
     operator!=(const reverse_iterator<_IteratorL>& __x,
     ^~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:349:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::reverse_iterator<_Iterator>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/stl_iterator.h:1130:5: note: candidate: template<class _IteratorL, class _IteratorR> bool std::operator!=(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&)
     operator!=(const move_iterator<_IteratorL>& __x,
     ^~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:1130:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::move_iterator<_IteratorL>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/stl_iterator.h:1136:5: note: candidate: template<class _Iterator> bool std::operator!=(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorL>&)
     operator!=(const move_iterator<_Iterator>& __x,
     ^~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:1136:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::move_iterator<_IteratorL>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/string:41:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/allocator.h:158:5: note: candidate: template<class _T1, class _T2> bool std::operator!=(const std::allocator<_CharT>&, const std::allocator<_T2>&)
     operator!=(const allocator<_T1>&, const allocator<_T2>&)
     ^~~~~~~~
/usr/include/c++/7/bits/allocator.h:158:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::allocator<_CharT>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/string:41:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/allocator.h:164:5: note: candidate: template<class _Tp> bool std::operator!=(const std::allocator<_CharT>&, const std::allocator<_CharT>&)
     operator!=(const allocator<_Tp>&, const allocator<_Tp>&)
     ^~~~~~~~
/usr/include/c++/7/bits/allocator.h:164:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::allocator<_CharT>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/basic_string.h:6044:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> bool std::operator!=(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:6044:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/basic_string.h:6057:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> bool std::operator!=(const _CharT*, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator!=(const _CharT* __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:6057:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   mismatched types 'const _CharT*' and 'std::pair<long long int, long long int>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from aliens.cpp:1:
/usr/include/c++/7/bits/basic_string.h:6069:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> bool std::operator!=(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)
     operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:6069:5: note:   template argument deduction/substitution failed:
aliens.cpp:117:11: note:   'std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
  if(v0 != NOPE) mask++;
           ^~~~
In file included from /usr/include/c++/7/bits/ios_base.h:46:0,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from aliens.cpp:1:
/usr/include/c++/7/system_error:319:3: note: candidate: bool std::operator!=(const std::error_code&, const std::error_code&)
   operator!=(const error_code& __lhs, const error_code& __rhs) noexcept
   ^~~~~~~~
/usr/include/c++/7/system_error:319:3: note:   no known conversion for argument 1 from 'std::pair<long long int, long long int>' to 'const std::error_code&'
/usr/include/c++/7/system_error:323:3: note: candidate: bool std::operator!=(const std::error_code&, const std::error_condition&)
   operator!=(const error_code& __lhs, const error_condition& __rhs) noexcept
   ^~~~~~~~
/usr/include/c++/7/system_error:323: