1 files changed, 88 insertions, 0 deletions
diff --git a/cpp/sorveglianza.c++ b/cpp/sorveglianza.c++
new file mode 100644
index 0000000..4154596
--- /dev/null
+++ b/cpp/sorveglianza.c++
@@ -0,0 +1,88 @@
+/* INPUT:
+10
+6
+2 5
+0 2
+1 3
+5 6
+4 7
+7 9
+
+OUTPUT:
+4*/
+#include <iostream>
+#include <vector>
+#include <fstream>
+
+using namespace std;
+
+int main(void)
+{
+	ifstream in;
+	ofstream out;
+	in.open("input.txt");
+	out.open("output.txt");
+	
+	int giorni, turniTot, i, j, tot = 0, m[2], x;
+	
+	in >> giorni;
+	in >> turniTot;
+	
+	vector< vector<int> > turni(turniTot, vector<int>(2));
+	int* eDay = new int[giorni];
+	
+	for(i = 0; i < giorni; i++) eDay[i] = 0;
+	
+	for(i = 0; i < turniTot; i++)
+	{
+		for(j = 0; j < 2; j++)
+		{
+			in >> x;
+			turni[i][j] = x;
+		}
+	}
+	
+	for(i = 0; i < turniTot-1; i++)
+	{
+		if(turni[i][0] > turni[i+1][0]) {
+			m[0] = turni[i][0];
+			m[1] = turni[i][1];
+			
+			turni[i][0] = turni[i+1][0];
+			turni[i][1] = turni[i+1][1];
+			
+			turni[i+1][0] = m[0];
+			turni[i+1][1] = m[1];
+		}
+		
+		if(turni[i][1] == giorni-1) {
+			m[0] = turni[i][0];
+			m[1] = turni[i][1];
+			
+			turni[i][0] = turni[i+1][0];
+			turni[i][1] = turni[i+1][1];
+			
+			turni[i+1][0] = m[0];
+			turni[i+1][1] = m[1];
+		}
+	}
+	
+	for(i = 0; i < turniTot-1; i++)
+	{
+		if(eDay[turni[i][0]] == 0) {
+			for(j = turni[i][0]; j <= turni[i][1]; j++) eDay[j] = 1;
+			tot++;
+		} else if(eDay[turni[i][1]] == 0 && turni[i][1] > turni[i+1][0]) {
+			for(j = turni[i][1]; j >= turni[i][0]; j--) eDay[j] = 1;
+			tot++;
+		}
+	}
+	
+	out << tot << endl;
+	
+	delete[] eDay;
+	in.close();
+	out.close();
+	
+	return 0;
+}