80分!求调!

P2367 语文成绩

pjr_freopen @ 2024-09-25 23:27:58

#include<algorithm>
#include<cstdio>
#include<cstring>
using namespace std;
const int N=5e6+5;
int a[N],d[N];
int main(){
    memset(d,0,sizeof(d));
    int n,m;
    scanf("%d%d",&n,&m);
    for(int i=1;i<=n;++i){
        scanf("%d",&a[i]);
    }
    int h=-1;
    while(m--){
        int x,y,z;
        scanf("%d%d%d",&x,&y,&z);
        d[x]+=z;
        d[y+1]-=z;
        if(y>h)h=y;
    }
    for(int i=2;i<=h;++i){
        d[i]+=d[i-1];
    }
    int ans=1<<30;
    for(int i=1;i<=n;++i){
        if(a[i]+d[i]<ans)ans=a[i]+d[i];
    } 
    printf("%d\n",ans);
    return 0;
}

by xujingbo @ 2024-09-25 23:42:59

初始化

d[i]=a[i]-a[i-1]


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