JZOJ 5922. sequence
5922. 【NOIP2018模拟10.23】sequence
(File IO): input:sequence.in output:sequence.out
Description
具体来说,对于每一天,优化改造的商店都是一个连续的区间 l ∼ r,每次优化改造也会有一个优化参数 k。对于所有 l ≤ i ≤ r ,第 i 个商店的便利值会增加
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小 F 想知道,m 天之后,每个商店的便利值分别是多少。由于小 F 并不喜欢高精度,因此你只需要输出便利值对 10^9 + 7 取模的结果。
Input
第 1 行,两个整数 n, m 表示街道的长度与天数。
接下来的 m 行,每行三个整数 l, r, k,表示第 i 天优化改造的商店区间和优化参数。
Output
每行 1 个整数,表示第 i 个商店的便利值对 109 + 7 取模的结果。
Sample Input
5 3
1 4 3
2 5 0
3 4 2 Sample 2
见选手目录下的sequence/sequence2.in与sequence/sequence2.ans。
该组样例的数据范围同第 1 个测试点。
Sample Output
1
5
12
24
1 第 1 次操作之后,每个商店的便利值分别为 1, 4, 10, 20, 0。
第 2 次操作之后,每个商店的便利值分别为 1, 5, 11, 21, 1。
第 3 次操作之后,每个商店的便利值分别为 1, 5, 12, 24, 1。
#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
#define LL long long
#define N 500010
#define rep(i,a,b) for(register int i=a;i<=b;++i)
#define dep(i,a,b) for(register int i=a;i>=b;--i)
using namespace std;
LL mo=1e9+;
int n,m;
LL f[][N],a[N],ans[N];
struct arr{
int l,r,k;
}e[N]; bool cmp(arr x,arr y){
return x.k>y.k;
} int read(){
int s=;
char ch=getchar();
for(;ch<''||ch>'';ch=getchar());
for(;ch>=''&&ch<='';s=s*+ch-'',ch=getchar());
return s;
} int main(){
freopen("sequence.in","r",stdin);
freopen("sequence.out","w",stdout);
n=read(),m=read();
a[]=;
rep(j,,)
rep(i,,n)
a[i]=(a[i]+a[i-])%mo,f[j][i]=a[i];
rep(i,,m) e[i].l=read(),e[i].r=read(),e[i].k=read();
sort(e+,e+m+,cmp);
int l=;
dep(i,e[].k,){
while(l<=m&&e[l].k==i) ++ans[e[l].l],++l;
rep(j,,l-)
ans[e[j].r+]=(ans[e[j].r+]-f[e[j].k-i][e[j].r-e[j].l+])%mo;
rep(j,,n)
ans[j]=(ans[j]+ans[j-]+mo)%mo;
}
rep(i,,n) printf("%lld\n",ans[i]);
}
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