代码：

#include<bits/stdc++.h>
using namespace std;

int mp[1005][1005], f[1005][1005][1005];

int main()
{
	memset(f, 0x81, sizeof f);
	int n, m;
	cin>>n>>m;
	for(int i=1; i<=n; i++) {
		for(int j=1; j<=m; j++) {
			cin>>mp[i][j];
		}
	} 
	
	for(int k=0; k<=1; k++) {//k=0往上 k=1从往下
		for(int i=1; i<=n; i++) {
			for(int j=1; j<=m; j++) {
				f[i][j][k] = max(f[i-1][j][1], max(f[i][j-1][1], f[i][j+1][0]))+mp[i][j];
			}
		}
	}
	
	int ans =  max(f[n][m][0], f[n][m][1]);
	cout<<ans;
	return 0;
}

错误信息(IDE)：

No valid executable file was produced by the compiler ./cculP5nW.o: in function __static_initialization_and_destruction_0(int, int)': src:(.text+0x285): relocation truncated to fit: R_X86_64_PC32 against .bss' src:(.text+0x29e): relocation truncated to fit: R_X86_64_PC32 against `.bss' collect2: 错误：ld 返回 1

沦落到编译错误都不会改的地步了，，，