提出 #38051067

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ソースコード 拡げる

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define f(i,j,k) for(register int i=j;i<=k;++i)
#define g(i,j,k) for(register int i=j;i>=k;--i)
int n,m,s,l;
int v[202020];
map<string,int>mp;
vector<int>q[202020];
int dfs(int x){
	if(v[x]==2)return 1;
	if(v[x])return 0;
	v[x]=2;
	f(i,1,q[x].size())if(dfs(q[x][i-1]))return 1;
	v[x]=1;
	return 0;
}
signed main(){
	cin>>n;
	string a,b;
	f(i,1,n){
		cin>>a>>b;
		if(!mp[a])mp[a]=++m;
		if(!mp[b])mp[b]=++m;
		q[mp[a]].push_back(mp[b]);
	}
	f(i,1,m)if(dfs(i))return printf("No\n"),0;
	printf("Yes\n");
	return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘long long int dfs(long long int)’:
./Main.cpp:14:4: warning: ISO C++17 does not allow ‘register’ storage class specifier [-Wregister]
   14 |  f(i,1,q[x].size())if(dfs(q[x][i-1]))return 1;
      |    ^
./Main.cpp:4:35: note: in definition of macro ‘f’
    4 | #define f(i,j,k) for(register int i=j;i<=k;++i)
      |                                   ^
./Main.cpp:4:40: warning: comparison of integer expressions of different signedness: ‘long long int’ and ‘std::vector<long long int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
    4 | #define f(i,j,k) for(register int i=j;i<=k;++i)
......
   14 |  f(i,1,q[x].size())if(dfs(q[x][i-1]))return 1;
      |    ~~~~~~~~~~~~~~~                      
./Main.cpp:14:2: note: in expansion of macro ‘f’
   14 |  f(i,1,q[x].size())if(dfs(q[x][i-1]))return 1;
      |  ^
./Main.cpp: In function ‘int main()’:
./Main.cpp:21:4: warning: ISO C++17 does not allow ‘register’ storage class specifier [-Wregister]
   21 |  f(i,1,n){
      |    ^
./Main.cpp:4:35: note: in definition of macro ‘f’
    4 | #define f(i,j,k) for(register int i=j;i<=k;++i)
      |                                   ^
./Main.cpp:27:4: warning: ISO C++17 does not allow ‘register’ storage class specifier [-Wregister]
   27 |  f(i,1,m)if(dfs(i))return printf("No\n"),0;
      |    ^
./Main.cpp:4:35: note: in definition of macro ‘f’
    4 | #define f(i,j,k) for(register int i=j;i<=k;++i)
      |                                   ^

ジャッジ結果