标签：hdu1789
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#include <stdio.h>
#include <string.h>
#include <algorithm>
#define maxn 1010
struct Node {
int days, penalty;
} arr[maxn];
bool vis[maxn];
bool cmp(Node a, Node b) {
return a.penalty > b.penalty;
}
int main() {
// freopen("stdin.txt", "r", stdin);
int t, n, i, j, sum, sum2;
scanf("%d", &t);
while(t--) {
scanf("%d", &n);
sum = sum2 = 0;
for(i = 0; i < n; ++i)
scanf("%d", &arr[i].days);
for(i = 0; i < n; ++i) {
scanf("%d", &arr[i].penalty);
sum += arr[i].penalty;
}
std::sort(arr, arr + n, cmp);
memset(vis, 0, sizeof(vis));
for(j = 0; j < n; ++j)
for(i = arr[j].days; i; --i)
if(!vis[i]) {
vis[i] = true;
sum2 += arr[j].penalty;
break;
}
printf("%d\n", sum - sum2);
}
return 0;
}#include <stdio.h>
#include <string.h>
#define maxn 1010
#define inf 0x3f3f3f3f
int G[maxn][maxn];
int Lx[maxn], Ly[maxn];
int match[maxn];
bool visx[maxn], visy[maxn];
int slack[maxn], n, m, sum;
bool DFS(int cur) {
int t, y;
visx[cur] = true;
for(y = 1; y <= n; ++y) {
if(visy[y]) continue;
t = Lx[cur] + Ly[y] - G[cur][y];
if(0 == t) {
visy[y] = true;
if(-1 == match[y] || DFS(match[y])) {
match[y] = cur; return true;
}
} else if(slack[y] > t) slack[y] = t;
}
return false;
}
int KM() {
int i, j, x, d, ret = 0;
memset(match, -1, sizeof(int) * (n + 1));
memset(Ly, 0, sizeof(int) * (n + 1));
for(i = 1; i <= n; ++i) {
Lx[i] = -inf;
for(j = 1; j <= n; ++j)
if(G[i][j] > Lx[i]) Lx[i] = G[i][j];
}
for(x = 1; x <= n; ++x) {
memset(slack, 0x3f, sizeof(int) * (n + 1));
while(true) {
memset(visx, 0, sizeof(bool) * (n + 1));
memset(visy, 0, sizeof(bool) * (n + 1));
if(DFS(x)) break;
d = inf;
for(i = 1; i <= n; ++i)
if(!visy[i] && d > slack[i])
d = slack[i];
for(i = 1; i <= n; ++i)
if(visx[i]) Lx[i] -= d;
for(i = 1; i <= n; ++i)
if(visy[i]) Ly[i] += d;
else slack[i] -= d;
}
}
for(i = 1; i <= n; ++i)
if(match[i] > -1)
ret += G[match[i]][i];
return ret;
}
void getMap() {
int i, w, j;
sum = 0;
scanf("%d", &n);
memset(G, 0, sizeof(G));
for(i = 1; i <= n; ++i)
scanf("%d", &match[i]); // 临时表示第i个任务可以匹配的天数
for(i = 1; i <= n; ++i) {
scanf("%d", &w);
sum += w;
for(j = 1; j <= match[i]; ++j)
G[i][j] = w;
}
}
void solve() {
printf("%d\n", sum - KM());
}
int main()
{
// freopen("stdin.txt", "r", stdin);
int t;
scanf("%d", &t);
while(t--) {
getMap();
solve();
}
}HDU1789 Doing Homework again 【贪心】
标签：hdu1789
原文地址：http://blog.csdn.net/chang_mu/article/details/40507939
