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很黄很暴力的做法#include<cstdio> #include<algorithm> #include<string.h> #include<iostream> #include<cmath> #include<vector> #include<fstream> #include<map> #include<list> #include<sstream> #include<queue> #include<set> using namespace std; set<vector<int> > hash; int a[12]; int main() { int t,n; while(scanf("%d %d",&t,&n)&&t) { hash.clear(); for(int i=0;i<n;i++) scanf("%d",a+i); printf("Sums of %d:\n",t); char ok=0; for(int i=(1<<n)-1;i>=0;i--) { int tmp=0,mask=1<<n; vector<int> tp1; for(int j=0;j<n;j++) { mask>>=1; if(mask&i) {tmp+=a[j]; tp1.push_back(a[j]);} } if(tmp==t&&hash.find(tp1)==hash.end()) { hash.insert(tp1); ok=1; for(int j=0;j<tp1.size();j++) { printf("%d",tp1[j]); if(j==tp1.size()-1) putchar('\n'); else putchar('+'); } } } if(!ok) puts("NONE"); } } Followed by:
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