玄学 RE

本地没问题但是交上去就 RE，检查了下好像不是返回值的问题

#include<stdio.h>
struct{
    int id,x1,y1,x2,y2,k;
}q[60001],q1[60001],q2[60001];
struct{
    int x,y,k;
}a[250001],a1[250001],a2[250001];
int n,res[60001],c[501][501];
void add(int x,int y,int k){
    for(int i=x;i<=n;i+=(i&-i))
        for(int j=y;j<=n;j+=(j&-j))
            c[i][j]+=k;
}
int sum(int x,int y){
    int s=0;
    for(int i=x;i;i-=(i&-i))
        for(int j=y;j;j-=(j&-j))
            s+=c[i][j];
    return s;
}
int sum(int x1,int y1,int x2,int y2){
    return sum(x2,y2)-sum(x1-1,y2)-sum(x2,y1-1)+sum(x1-1,y1-1);
}
void solve(int l,int r,int al,int ar,int ql,int qr){
    if(ql>qr)return;
    if(l==r){
        for(int i=ql;i<=qr;++i)res[q[i].id]=l;
        return;
    }
    int mid=l+r>>1,p1=0,p2=0,p3=0,p4=0;
    for(int i=al;i<=ar;++i)
        if(a[i].k<=mid)
            add(a[i].x,a[i].y,1),a1[++p1]=a[i];
        else a2[++p2]=a[i];
    for(int i=ql,k;i<=qr;++i)
        if(q[i].k<=(k=sum(q[i].x1,q[i].y1,q[i].x2,q[i].y2)))q1[++p3]=q[i];
        else q[i].k-=k,q2[++p4]=q[i];
    for(int i=1;i<=p1;++i)add(a1[i].x,a1[i].y,-1),a[al-1+i]=a1[i];
    for(int i=1;i<=p2;++i)a[al-1+p1+i]=a2[i];
    for(int i=1;i<=p3;++i)q[ql-1+i]=q1[i];
    for(int i=1;i<=p4;++i)q[ql-1+p3+i]=q2[i];
    solve(l,mid,al,al-1+p1,ql,ql-1+p3),solve(mid+1,r,al+p1,ar,ql+p3,qr);
}
int main(){
    int m,tot;
    scanf("%d%d",&n,&m);
    for(int i=1;i<=n;++i)for(int j=1;j<=n;++j)scanf("%d",&a[++tot].k),a[tot].x=i,a[tot].y=j;
    for(int i=1;i<=m;++i)scanf("%d%d%d%d%d",&q[i].x1,&q[i].y1,&q[i].x2,&q[i].y2,&q[i].k),q[i].id=i;
    solve(0,1000000000,1,n*n,1,m);
    for(int i=1;i<=m;++i)printf("%d\n",res[i]);
    return 0;
}