JOJ 1343 城际公路网

WA

1. 函数体内用的是从 1 开始的数组, 而接受的 input 是从 0 开始的, 又是好2的错误

代码

#include <iostream>
#include <stdio.h>
#include <memory.h>
#include <algorithm>
#include <vector>
#include <map>
#include <set>
#include <string>
#include <deque>
#include <cstring>
#define MIN(x,y) (x)<(y)?(x):(y)
using namespace std;

int matrix[100][100];

int totalCost(int n) {
	int sum = 0;

	for(int i = 1; i <= n; i ++)  {
		for(int j = 1; j <= n; j ++)  {
			sum += matrix[i][j];
		}
	}
	return sum/2;
}

int updateMatrix(int n, int from, int to, int newCost)  {
	matrix[from][to] = newCost;
	matrix[to][from] = newCost;

	for(int i = 1; i <= n; i ++)  {
		for(int j = 1; j <= n; j ++)  {
			int dist1 = matrix[i][from] + matrix[to][j] + newCost;
			int dist2 = matrix[i][to] + matrix[from][j] + newCost;
			matrix[i][j] = min(matrix[i][j], dist1);
			matrix[i][j] = min(matrix[i][j], dist2);

			printf("matrix[%d][%d] = %d
",i, j, matrix[i][j]);
		}
	}
	return totalCost(n);
}

int main() {
	freopen("C:\Users\vincent\Dropbox\workplacce\joj\test.txt", "r", stdin);
	
	int n;
	while(scanf("%d", &n) != EOF)  {
		for(int i = 1; i <= n; i ++)  {
			for(int j = 1; j <= n; j ++)  {
				scanf("%d", &matrix[i][j]);
			}
		}
		int m;
		scanf("%d", &m);
		for(int i = 0; i < m; i ++)  {
			int from, to, cost;
			scanf("%d%d%d", &from, &to, &cost);
			int res = updateMatrix(n, from, to, cost);
			printf("%d
", res);
		}

	}
	return 0;
}