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思路跟你一样,对拍了一下发现query少了个spread !感谢啊分享In Reply To:AC code Posted by:caizixian at 2010-02-09 14:21:48 > Source Code
> Problem: 3667 User: caizixian
> Memory: 3296K Time: 594MS
> Language: C++ Result: Accepted
>
> * Source Code
>
> #include <stdio.h>
>
>
>
> #define Max(a, b) ((a)>(b)?(a):(b))
>
>
>
> const int N = 50010;
>
>
>
> struct ST {int i,j,m,l,r,c,lc,rc;} st[2*N]; //区????´å®½åº¦çš„2å€�
>
> int up, n;
>
>
>
> void bd(int d, int x, int y) {
>
> st[d].i = x, st[d].j = y, st[d].m = (x+y)/2;
>
> st[d].c = st[d].lc = st[d].rc = y-x;
>
> if(x < y-1) {
>
> st[d].l = ++up; bd(up, x, st[d].m);
>
> st[d].r = ++up; bd(up, st[d].m, y);
>
> }
>
> }
>
>
>
> void spread(int d) {
>
> if(st[d].c == st[d].j-st[d].i) {
>
> int& l = st[d].l, &r = st[d].r;
>
> st[l].c = st[l].lc = st[l].rc = st[l].j-st[l].i;
>
> st[r].c = st[r].lc = st[r].rc = st[r].j-st[r].i;
>
> } else if(st[d].c == 0) {
>
> int& l = st[d].l, &r = st[d].r;
>
> st[l].c = st[l].lc = st[l].rc = 0;
>
> st[r].c = st[r].lc = st[r].rc = 0;
>
> }
>
> }
>
>
>
> void update(int d) {
>
> st[d].c = Max(Max(st[st[d].l].c, st[st[d].r].c), st[st[d].l].rc + st[st[d].r].lc);
>
> if(st[st[d].l].c == st[st[d].l].j-st[st[d].l].i) {
>
> st[d].lc = st[st[d].l].c + st[st[d].r].lc;
>
> } else st[d].lc = st[st[d].l].lc;
>
> if(st[st[d].r].rc == st[st[d].r].j-st[st[d].r].i) {
>
> st[d].rc = st[st[d].r].rc + st[st[d].l].rc;
>
> } else st[d].rc = st[st[d].r].rc;
>
> }
>
>
>
> void Empty(int d, int x, int y) {
>
> if(x <= st[d].i && y >= st[d].j) {
>
> st[d].c = st[d].lc = st[d].rc = 0;
>
> return;
>
> }
>
>
>
> spread(d);
>
>
>
> if(x < st[d].m) Empty(st[d].l, x, y);
>
> if(y > st[d].m) Empty(st[d].r, x, y);
>
>
>
> update(d);
>
> }
>
>
>
> void Fill(int d, int x, int y) {
>
> if(x <= st[d].i && y >= st[d].j) {
>
> st[d].c = st[d].lc = st[d].rc = st[d].j-st[d].i;
>
> return;
>
> }
>
>
>
> spread(d);
>
>
>
> if(x < st[d].m) Fill(st[d].l, x, y);
>
> if(y > st[d].m) Fill(st[d].r, x, y);
>
>
>
> update(d);
>
> }
>
>
>
> int Get(int d, int l) {
>
>
>
> spread(d);
>
>
>
> if(st[d].c < l) return -1;
>
> if(st[st[d].l].c >= l)
>
> return Get(st[d].l, l);
>
> else if(st[st[d].l].rc + st[st[d].r].lc >= l) {
>
> return st[st[d].l].j-st[st[d].l].rc;
>
> }
>
> return Get(st[d].r, l);
>
> }
>
>
>
> int main()
>
> {
>
> int i, nq, cmd, x, l, y;
>
> up = 0;
>
> scanf("%d%d", &n, &nq);
>
> bd(0, 0, n);
>
> while(nq--) {
>
> scanf("%d", &cmd);
>
> if(cmd == 1) {
>
> scanf("%d", &l);
>
> x = Get(0, l);
>
> if(x != -1)
>
> Empty(0, x, x+l);
>
> printf("%d\n", x+1);
>
> } else {
>
> scanf("%d%d", &x, &l);
>
> Fill(0, x-1, x+l-1);
>
> }
>
> }
>
> return 0;
>
> }
>
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