dalao们,为什么这样不能输入

P1216 [USACO1.5] [IOI1994]数字三角形 Number Triangles

ngmhhy @ 2023-10-18 14:22:35


#include<bits/stdc++.h>
using namespace std;
int num[1000][1000];
int main(){
    int r;
    scanf("%d",&r);
    for(int i=1;i<=r;i++){
        for(int j=1;j<=i;j++){
            scanf("%d",&num[i][j]);
        }
    }
    for(int i=r-1;i>=1;i++){
        for(int j=1;j<=i;j++){
            num[i][j]=max(num[i+1][j]+num[i][j],num[i+1][j+1]+num[i][j]);
        }
    }
    printf("%d",num[1][1]);
}

by zheng_zx @ 2023-10-18 14:24:05

死循环


by Gch738 @ 2023-10-18 14:25:28

《for(int i=r-1;i>=1;i++)》


by L2YXY @ 2023-10-18 14:25:29

#include<bits/stdc++.h>
using namespace std;
int num[1005][1005];
int main(){
    int r;
    scanf("%d",&r);
    for(int i=1;i<=r;i++){
        for(int j=1;j<=i;j++){
            scanf("%d",&num[i][j]);
        }
    }
    for(int i=r-1;i>=1;i--){
        for(int j=1;j<=i;j++){
            num[i][j]=max(num[i+1][j]+num[i][j],num[i+1][j+1]+num[i][j]);
        }
    }
    printf("%d",num[1][1]);
}

这个


by operator_ @ 2023-10-18 14:25:38

for(int i=r-1;i>=1;i++)


by L2YXY @ 2023-10-18 14:26:07

改完了


by L2YXY @ 2023-10-18 14:27:58

@ngmhhy


by zheng_zx @ 2023-10-18 14:28:28

for(int i=r-1;i>=1;i--) 你写成i++了

还有数组开小了

AC code:

#include<bits/stdc++.h>
using namespace std;
int num[1001][1001];
int main(){
    int r;
    scanf("%d",&r);
    for(int i=1;i<=r;i++){
        for(int j=1;j<=i;j++){
            scanf("%d",&num[i][j]);
        }
    }
    for(int i=r-1;i>=1;i--){
        for(int j=1;j<=i;j++){
            num[i][j]=max(num[i+1][j]+num[i][j],num[i+1][j+1]+num[i][j]);
        }
    }
    printf("%d",num[1][1]);
}

by L2YXY @ 2023-10-18 14:30:00

从1开始输入数组1000不够


by wxh666 @ 2023-10-18 16:28:51

有一种CCF初赛的美


by ngmhhy @ 2023-10-18 20:25:30

@L2YXY @zheng_zx @operator_ @Gch738谢谢头一次帖子有那么多人帮我(小声嘀咕)(落泪)


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