背包问题

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完全背包问题

function getMaxGold(n,w,g,p){            var nextGold,                results = [];            for(var i = 0; i <= w; i++){                results[i] = (i < p[0]) ? 0 : g[0];            }            for(var i = 0; i < n; i++){                for(var j = 0; j <= w; j++){                    if(j >= p[i]){                        nextGold = g[i] + results[j-p[i]];                        results[j] = Math.max(results[j],nextGold);                    }                }                console.log(results);            }            return results;        }        console.log(getMaxGold(5,10,[400,500,200,300,350],[5,5,3,4,3]));

01背包问题

function getMaxGold2(n,w,g,p){            var preResults = [],                results = [];            for(var i = 0; i <= w; i++){                preResults[i] = (i < p[0]) ? 0 : g[0];            }            for(var i = 1; i < n; i++){                for(var j = 0; j <= w; j++){                    if(j < p[i]){                        results[j] = preResults[j];                    }else{                        results[j] = Math.max(preResults[j],g[i] + preResults[j-p[i]]);                    }                }                for(var k = 0 ; k <= w; k++){                    preResults[k] = results[k];                }            }            return results;        }        // console.log(getMaxGold2(5,10,[400,500,200,300,350],[5,5,3,4,3]));

01背包问题

    function getMaxGold3(n,w,g,p){            var nextGold,                results = [];            for(var i = 0; i <= w; i++){                results[i] = (i < p[0]) ? 0 : g[0];            }            for(var i = 1; i < n; i++){                for(var j = w; j >= 0; j--){                    if(j >= p[i]){                        nextGold = g[i] + results[j-p[i]];                        // console.log(nextGold);                        results[j] = Math.max(results[j],nextGold);                    }                }            }            return results;        }        // console.log(getMaxGold3(5,10,[400,500,200,300,350],[5,5,3,4,3]));

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