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i>=0; i--) {\n if (sortedCoals[i].price < minPP) minPP = sortedCoals[i].price;\n minPrices[i] = minPP;\n }\n let totalCombos = 0;\n const allResults = [];\n for (let n=1; n<=maxShovels; n++) {\n let upperBound = Infinity;\n const greedy = (()=>{\n const combo = Array(sortedCoals.length).fill(0);\n let rem = n;\n for (let i=0; i0; i++) {\n combo[i] = rem;\n const r = evaluateCombo(sortedCoals, combo, useWeighted, constraints);\n if (r) { rem=0; break; }\n combo[i] = 0;\n }\n return rem>0 ? null : evaluateCombo(sortedCoals, combo, useWeighted, constraints);\n })();\n if (greedy) upperBound = greedy.totalCost;\n const current = Array(sortedCoals.length).fill(0);\n (function dfs(idx, rem, curCost) {\n if (rem === 0) {\n const r = evaluateCombo(sortedCoals, current, useWeighted, constraints);\n if (r && r.totalCost < upperBound) {\n upperBound = r.totalCost;\n allResults.push({...r, combo: current.slice()});\n totalCombos++;\n }\n return;\n }\n if (idx === sortedCoals.length-1) {\n current[idx] = rem;\n const r = evaluateCombo(sortedCoals, current, useWeighted, constraints);\n if (r && r.totalCost < upperBound) {\n upperBound = r.totalCost;\n allResults.push({...r, combo: current.slice()});\n totalCombos++;\n }\n current[idx] = 0;\n return;\n }\n const minCost = minPrices[idx+1] || 0;\n for (let k=0; 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