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请教,各位不知道这段代码为什么WA,测试数据都OK:)#include<iostream> using namespace std; int main() { int w[21][21][21]; int a,b,c; int i,j,k; for(i=0;i<=20;i++) { for(j=0;j<=20;j++) { w[0][i][j]=1; w[i][0][j]=1; w[i][j][0]=1; } } while(cin>>a>>b>>c) { if(a==-1 && b==-1 && c==-1) return 0; if(a<0 || b<0 || c<=0) { cout<<"w("<<a<<", "<<b<<", "<<c<<") = "<<1<<endl; continue; } if(a>20 || b>20 || c>20) { a=b=c=20; } for(i=1;i<=a;i++) { for(j=1;j<=b;j++) { for(k=1;k<=c;k++) { if(i<j && j<k) w[i][j][k]=w[i][j][k-1]+w[i][j-1][k-1]-w[i][j-1][k]; else w[i][j][k]=w[i-1][j][k]+w[i-1][j-1][k]+w[i-1][j][k-1]-w[i-1][j-1][k-1]; } } } cout<<"w("<<a<<", "<<b<<", "<<c<<") = "<<w[a][b][c]<<endl; for(i=1;i<=a;i++) { for(j=1;j<=b;j++) { for(k=1;k<=c;k++) w[i][j][k]=0; } } } return 0; } Followed by:
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