Codeforces Round #427 (Div. 2) C Star sky
The Cartesian coordinate system is set in the sky. There you can see n stars, the i-th has coordinates (xi, yi), a maximum brightness c, equal for all stars, and an initial brightness si (0 ≤ si ≤ c).
Over time the stars twinkle. At moment 0 the i-th star has brightness si. Let at moment t some star has brightness x. Then at moment (t + 1) this star will have brightness x + 1, if x + 1 ≤ c, and 0, otherwise.
You want to look at the sky q times. In the i-th time you will look at the moment ti and you will see a rectangle with sides parallel to the coordinate axes, the lower left corner has coordinates (x1i, y1i) and the upper right — (x2i, y2i). For each view, you want to know the total brightness of the stars lying in the viewed rectangle.
A star lies in a rectangle if it lies on its border or lies strictly inside it.
The first line contains three integers n, q, c (1 ≤ n, q ≤ 105, 1 ≤ c ≤ 10) — the number of the stars, the number of the views and the maximum brightness of the stars.
The next n lines contain the stars description. The i-th from these lines contains three integers xi, yi, si (1 ≤ xi, yi ≤ 100, 0 ≤ si ≤ c ≤ 10) — the coordinates of i-th star and its initial brightness.
The next q lines contain the views description. The i-th from these lines contains five integers ti, x1i, y1i, x2i, y2i (0 ≤ ti ≤ 109, 1 ≤ x1i < x2i ≤ 100, 1 ≤ y1i < y2i ≤ 100) — the moment of the i-th view and the coordinates of the viewed rectangle.
For each view print the total brightness of the viewed stars.
2 3 3 1 1 1 3 2 0 2 1 1 2 2 0 2 1 4 5 5 1 1 5 5
3 0 3
3 4 5 1 1 2 2 3 0 3 3 1 0 1 1 100 100 1 2 2 4 4 2 2 1 4 7 1 50 50 51 51
3 3 5 0
Let's consider the first example.
At the first view, you can see only the first star. At moment 2 its brightness is 3, so the answer is 3.
At the second view, you can see only the second star. At moment 0 its brightness is 0, so the answer is 0.
At the third view, you can see both stars. At moment 5 brightness of the first is 2, and brightness of the second is 1, so the answer is 3.
写到一半断网了。。。很绝望啊
容易发现c++后取模
应该是每一个(x+t%c)%c
但是我试图把几个x合起来
然后直接(sumx+有几个*t)然后去%c
很明显是不对的
只可以把%拆到括号里而不能把括号里的取出来
所以我们要另开一维 t%c
这样就可以分开存了
还有注意注意矩形是f[t][x2][y2]-f[t][x1-1][y2]-f[t][x2][y1-1]+f[t][x1-1][y1-1]
#include<cstdio> #include<cstdlib> int f[15][105][105]; int main() { int n,q,c; scanf("%d %d %d",&n,&q,&c); c++; int x,y,s; for(int i=1;i<=n;i++) { scanf("%d %d %d",&x,&y,&s); for(int t=0;t<c;t++) f[t][x][y]+=(s+t)%c; } for(int t=0;t<c;t++) for(int i=1;i<=100;i++) for(int j=1;j<=100;j++) f[t][i][j]+=f[t][i-1][j]+f[t][i][j-1]-f[t][i-1][j-1]; int t,x1,y1,x2,y2; for(int i=1;i<=q;i++) { scanf("%d %d %d %d %d",&t,&x1,&y1,&x2,&y2); t%=c; printf("%d\n",f[t][x2][y2]-f[t][x1-1][y2]-f[t][x2][y1-1]+f[t][x1-1][y1-1]); } return 0; }