Submission #1856778

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Source Code Expand

#include <cstdio>
#include <algorithm>
int a[200000],d[200000];
int *dp[200000];
int const INF = 1000000007;
bool comp(const int* a,const int* b){
    return *a<*b;
}
int main(void){
    int n,q,i,j,tmp;
    long long sum=0,ans;
    scanf("%d %d",&n,&q);
    for(i=0;i<2*n;i++){
        scanf("%d",&a[i]);
        sum+=a[i];
    }
    for(i=0;i<2*n;i++){
        scanf("%d",&tmp);
        d[i]=tmp-a[i];
        dp[i]=&d[i];
    }
    int p,x,y;
    for(i=0;i<q;i++){
        scanf("%d%d%d",&p,&x,&y);
        sum=sum+x-a[p-1];
        a[p-1]=x;
        d[p-1]=y-x;
        d[0]=-INF;
        d[2*n-1]=-INF;
        std::sort(dp,dp+2*n,comp);
        //printf("%lld,",sum);
        ans=sum;
        for(j=2*n-1;j>0 && *(dp[j-1])>0;j-=2){
            ans=ans+(*(dp[j]))+(*(dp[j-1]));
        }
        printf("%lld\n",ans);
    }
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:12:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&n,&q);
                         ^
./Main.cpp:14:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&a[i]);
                          ^
./Main.cpp:18:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&tmp);
                         ^
./Main.cpp:24:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d",&p,&x,&y);
                                 ^

Judge Result