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新人一次AC,C++代码,抛砖引玉堆栈解法 #include<iostream> #include<string.h> #include<cmath> using namespace std; int main() { char a[250]; int b[6]; gets(a); int l; while (a[0]!='0') { int p=1; for (int i=1;i<=5;i++) b[i]=0; for (int i=0;i<=32&&p;i++) { int i1=i; for (int j=0;j<5;j++) { b[j]=i1%2; i1=i1/2; } l=strlen(a); int ls=0; int c[100]; for (int j=l-1;j>=0;j--) { if (a[j]>='p'&&a[j]<='t') { ls++; c[ls]=b[int(a[j]-'p')]; } if (a[j]=='N') c[ls]=!c[ls]; if (a[j]=='K') { ls--; c[ls]=(c[ls]&&c[ls+1]); } if (a[j]=='A') { ls--; c[ls]=(c[ls]||c[ls+1]); } if (a[j]=='E') { ls--; c[ls]=(c[ls]==c[ls+1]); } if (a[j]=='C') { ls--; c[ls]=((!c[ls])||c[ls+1]); } } if (!c[1]) p=0; } if (p) cout<<"tautology\n"; else cout<<"not\n"; gets(a); } return 0; } Followed by: Post your reply here: |
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